FPUS55 KPSR 190631 ZFPPSR Zone Forecast Product for Southwest Arizona/Southeast California National Weather Service Phoenix AZ 1131 PM MST Wed Mar 18 2026 This is an automatically generated product that provides average values for large geographical areas and may not be representative of the exact location that you are interested in. For a more site specific forecast, please visit weather.gov/phoenix and either (1) Select a location from the dropdown menu above the map or (2) Click a location on the map. You can refine your selection by clicking on the map displayed on the resulting page. AZZ537-540-542>544-546-548-550-551-191100- Northwest Valley-Buckeye/Avondale-Deer Valley-Central Phoenix- North Phoenix/Glendale-Scottsdale/Paradise Valley-East Valley- South Mountain/Ahwatukee-Southeast Valley/Queen Creek- Including the cities of Circle City, Surprise, Wittmann, Beardsley, Sun City West, Avondale, Cashion, Goodyear, Liberty, Peoria, Phoenix, Paradise Valley, Mesa, Chandler, Tempe, Gilbert, Sun Lakes, and Queen Creek 1131 PM MST Wed Mar 18 2026 ...EXTREME HEAT WARNING IN EFFECT FROM 11 AM THURSDAY TO 8 PM MST SUNDAY... .TONIGHT...Clear. Lows 61 to 69. West wind 5 to 10 mph in the evening becoming northeast after midnight. .THURSDAY...Sunny and hot. Highs 100 to 105. East wind 5 to 10 mph in the morning becoming south around 5 mph in the afternoon. .THURSDAY NIGHT...Clear. Lows 62 to 71. Northwest wind around 5 mph in the evening becoming northeast after midnight. .FRIDAY...Sunny and hot. Highs 102 to 106. East wind around 5 mph in the morning becoming southwest in the afternoon. .FRIDAY NIGHT...Clear. Lows 63 to 71. West wind 5 to 10 mph in the evening becoming northeast around 5 mph after midnight. .SATURDAY...Sunny and hot. Highs 101 to 107. .SATURDAY NIGHT...Clear in the evening then becoming partly cloudy. Lows 64 to 71. .SUNDAY...Partly sunny and hot. Highs 98 to 103. .SUNDAY NIGHT...Partly cloudy. Lows 62 to 70. .MONDAY...Mostly sunny and hot. Highs 97 to 102. .MONDAY NIGHT...Clear. Lows 62 to 69. .TUESDAY...Sunny and hot. Highs 99 to 104. .TUESDAY NIGHT...Clear. Lows 63 to 70. .WEDNESDAY...Sunny and hot. Highs 99 to 105. $$ AZZ541-549-555-191100- Cave Creek/New River-Fountain Hills/East Mesa- Apache Junction/Gold Canyon- Including the cities of Scottsdale, Fountain Hills, and Apache Junction 1131 PM MST Wed Mar 18 2026 ...EXTREME HEAT WARNING IN EFFECT FROM 11 AM THURSDAY TO 8 PM MST SUNDAY... .TONIGHT...Clear. Lows 60 to 70. Northeast wind 5 to 10 mph. .THURSDAY...Sunny and hot. Highs 99 to 104. Northeast wind 5 to 10 mph in the morning becoming southwest around 5 mph in the afternoon. .THURSDAY NIGHT...Clear. Lows 61 to 71. North wind 5 to 10 mph. .FRIDAY...Sunny and hot. Highs 100 to 105. East wind 5 to 10 mph in the morning becoming southwest in the afternoon. .FRIDAY NIGHT...Clear. Lows 61 to 71. Northwest wind around 5 mph in the evening becoming northeast 5 to 10 mph after midnight. .SATURDAY...Sunny and hot. Highs 99 to 105. .SATURDAY NIGHT...Mostly clear. Lows 66 to 71. .SUNDAY...Partly sunny and hot. Highs 96 to 102. .SUNDAY NIGHT...Partly cloudy. Lows 64 to 69. .MONDAY...Mostly sunny and hot. Highs 95 to 101. .MONDAY NIGHT...Clear. Lows 63 to 68. .TUESDAY...Sunny and hot. Highs 97 to 103. .TUESDAY NIGHT...Clear. Lows 64 to 69. .WEDNESDAY...Sunny and hot. Highs 98 to 104. $$ AZZ553-554-191100- Northwest Pinal County-West Pinal County- Including the cities of Casa Grande, Cactus Forest, Florence, and Coolidge 1131 PM MST Wed Mar 18 2026 ...EXTREME HEAT WARNING IN EFFECT FROM 11 AM THURSDAY TO 8 PM MST SUNDAY... .TONIGHT...Clear. Lows 56 to 66. West wind around 5 mph in the evening becoming southeast after midnight. .THURSDAY...Sunny and hot. Highs 101 to 106. East wind around 5 mph in the morning becoming northeast in the afternoon. .THURSDAY NIGHT...Clear. Lows 57 to 67. Northwest wind around 5 mph in the evening becoming southeast after midnight. .FRIDAY...Sunny and hot. Highs 102 to 107. East wind around 5 mph in the morning becoming northwest in the afternoon. .FRIDAY NIGHT...Clear. Lows 59 to 69. Northwest wind around 5 mph in the evening becoming southeast after midnight. .SATURDAY...Sunny and hot. Highs 101 to 107. .SATURDAY NIGHT...Mostly clear. Lows 60 to 69. .SUNDAY...Partly sunny and hot. Highs 98 to 104. .SUNDAY NIGHT...Partly cloudy. Lows 58 to 67. .MONDAY...Mostly sunny and hot. Highs 97 to 103. .MONDAY NIGHT...Clear. Lows 57 to 66. .TUESDAY...Sunny and hot. Highs 98 to 104. .TUESDAY NIGHT...Clear. Lows 59 to 67. .WEDNESDAY...Sunny and hot. Highs 99 to 105. $$ AZZ532-191100- Yuma- Including the cities of Yuma and Fortuna Foothills 1131 PM MST Wed Mar 18 2026 ...EXTREME HEAT WARNING IN EFFECT FROM 11 AM THURSDAY TO 8 PM MST SUNDAY... .TONIGHT...Clear. Lows 62 to 66. West wind 5 to 10 mph in the evening becoming light after midnight. .THURSDAY...Sunny and hot. Highs near 105. Northeast wind around 5 mph in the morning becoming northwest in the afternoon. .THURSDAY NIGHT...Clear. Lows 65 to 70. Light wind. .FRIDAY...Sunny and hot. Highs near 107. Northeast wind around 5 mph in the morning becoming northwest in the afternoon. .FRIDAY NIGHT...Clear. Lows 67 to 70. Southwest wind around 5 mph in the evening becoming north after midnight. .SATURDAY...Sunny and hot. Highs 104 to 108. .SATURDAY NIGHT...Partly cloudy. Lows in the mid 60s to lower 70s. .SUNDAY...Partly sunny and hot. Highs 100 to 102. .SUNDAY NIGHT...Partly cloudy. Lows 62 to 67. .MONDAY...Sunny. Highs 96 to 100. .MONDAY NIGHT...Clear. Lows 59 to 65. .TUESDAY...Sunny. Highs 99 to 101. .TUESDAY NIGHT...Clear. Lows 62 to 68. .WEDNESDAY...Sunny and hot. Highs 101 to 103. $$ AZZ562-191100- Globe/Miami- Including the cities of Globe and Miami 1131 PM MST Wed Mar 18 2026 .TONIGHT...Mostly clear. Lows 51 to 61. Northwest wind 5 to 10 mph in the evening becoming east after midnight. .THURSDAY...Sunny. Highs 88 to 98. Southeast wind around 5 mph. .THURSDAY NIGHT...Clear. Lows 53 to 63. West wind around 5 mph in the evening becoming northeast after midnight. .FRIDAY...Sunny and hot. Highs 90 to 100. East wind around 5 mph in the morning becoming west 5 to 10 mph in the afternoon. .FRIDAY NIGHT...Clear. Lows 54 to 64. Northwest wind 5 to 10 mph in the evening becoming northeast around 5 mph after midnight. .SATURDAY...Sunny. Highs in the mid to upper 90s. .SATURDAY NIGHT...Mostly clear. Lows in the lower 60s. .SUNDAY...Partly sunny. Highs in the lower to mid 90s. .SUNDAY NIGHT...Partly cloudy. Lows near 60. .MONDAY...Partly sunny in the morning then becoming sunny. Highs near 90. .MONDAY NIGHT...Clear. Lows near 60. .TUESDAY...Sunny. Highs 90 to 96. .TUESDAY NIGHT...Clear. Lows in the lower 60s. .WEDNESDAY...Sunny. Highs 91 to 97. $$ AZZ545-547-552-561-191100- New River Mesa-Rio Verde/Salt River-Superior-Dripping Springs- Including the cities of Tortilla Flat, Superior, Hayden, and Winkelman 1131 PM MST Wed Mar 18 2026 ...EXTREME HEAT WARNING IN EFFECT FROM 11 AM THURSDAY TO 8 PM MST SUNDAY... .TONIGHT...Clear. Lows 60 to 70. Northeast wind 5 to 10 mph. .THURSDAY...Sunny and hot. Highs 100 to 105. Northeast wind 5 to 10 mph in the morning becoming south around 5 mph in the afternoon. .THURSDAY NIGHT...Clear. Lows 61 to 71. North wind 5 to 10 mph. .FRIDAY...Sunny and hot. Highs 101 to 106. East wind 5 to 10 mph in the morning becoming southwest in the afternoon. .FRIDAY NIGHT...Clear. Lows 61 to 71. Northwest wind 5 to 10 mph in the evening becoming northeast after midnight. .SATURDAY...Sunny and hot. Highs 93 to 105. .SATURDAY NIGHT...Clear. Lows 62 to 70. .SUNDAY...Partly sunny and hot. Highs 89 to 101. .SUNDAY NIGHT...Partly cloudy. Lows 61 to 69. .MONDAY...Partly sunny in the morning then becoming sunny. Hot. Highs 87 to 101. .MONDAY NIGHT...Clear. Lows 60 to 68. .TUESDAY...Sunny and hot. Highs 90 to 102. .TUESDAY NIGHT...Clear. Lows 61 to 69. .WEDNESDAY...Sunny and hot. Highs 90 to 104. $$ AZZ556>558-191100- Tonto Basin-Mazatzal Mountains-Pinal/Superstition Mountains- Including the cities of Punkin Center and Sunflower 1131 PM MST Wed Mar 18 2026 .TONIGHT...Clear. Lows 56 to 66. Northwest wind 10 to 15 mph in the evening becoming northeast after midnight. .THURSDAY...Sunny. Highs 94 to 99. Northeast wind 5 to 10 mph in the morning becoming south in the afternoon. .THURSDAY NIGHT...Clear. Lows 58 to 68. Northwest wind 5 to 10 mph in the evening becoming northeast after midnight. .FRIDAY...Sunny and hot. Highs 96 to 101. East wind 5 to 10 mph in the morning becoming west in the afternoon. .FRIDAY NIGHT...Clear. Lows 58 to 68. Northwest wind 5 to 10 mph in the evening becoming northeast after midnight. .SATURDAY...Sunny and hot. Highs 86 to 100. .SATURDAY NIGHT...Mostly clear. Lows 58 to 66. .SUNDAY...Partly sunny. Highs 83 to 97. .SUNDAY NIGHT...Partly cloudy. Lows 57 to 65. .MONDAY...Partly sunny in the morning then becoming sunny. Highs 81 to 95. .MONDAY NIGHT...Clear. Lows 56 to 64. .TUESDAY...Sunny. Highs 84 to 98. .TUESDAY NIGHT...Clear. Lows 57 to 65. .WEDNESDAY...Sunny. Highs 84 to 98. $$ AZZ560-563-191100- San Carlos-Southeast Gila County- Including the cities of San Carlos and Peridot 1131 PM MST Wed Mar 18 2026 .TONIGHT...Clear. Lows 53 to 63. Northwest wind 5 to 10 mph in the evening becoming east after midnight. .THURSDAY...Sunny. Highs 87 to 97. East wind 5 to 10 mph in the morning becoming south in the afternoon. .THURSDAY NIGHT...Clear. Lows 55 to 65. East wind 5 to 10 mph. .FRIDAY...Sunny and hot. Highs 90 to 100. Northeast wind 5 to 10 mph in the morning becoming west in the afternoon. .FRIDAY NIGHT...Clear. Lows 56 to 66. Northwest wind 5 to 10 mph in the evening becoming northeast after midnight. .SATURDAY...Sunny. Highs 85 to 99. .SATURDAY NIGHT...Mostly clear. Lows 46 to 64. .SUNDAY...Partly sunny. Highs 82 to 96. .SUNDAY NIGHT...Partly cloudy. Lows 43 to 63. .MONDAY...Partly sunny in the morning then becoming sunny. Highs 80 to 94. .MONDAY NIGHT...Clear. Lows 42 to 62. .TUESDAY...Sunny. Highs 82 to 96. .TUESDAY NIGHT...Clear. Lows 45 to 64. .WEDNESDAY...Sunny. Highs 84 to 98. $$ AZZ539-559-191100- Gila Bend-Sonoran Desert Natl Monument- Including the cities of Gila Bend, Sentinel, and Kaka 1131 PM MST Wed Mar 18 2026 ...EXTREME HEAT WARNING IN EFFECT FROM 11 AM THURSDAY TO 8 PM MST SUNDAY... .TONIGHT...Clear. Lows 62 to 72. West wind 5 to 10 mph in the evening becoming light after midnight. .THURSDAY...Sunny and hot. Highs 101 to 106. East wind around 5 mph in the morning becoming north in the afternoon. .THURSDAY NIGHT...Clear. Lows 65 to 75. Northwest wind around 5 mph in the evening becoming light after midnight. .FRIDAY...Sunny and hot. Highs 103 to 108. East wind around 5 mph in the morning becoming northwest in the afternoon. .FRIDAY NIGHT...Clear. Lows 65 to 75. West wind around 5 mph in the evening becoming light after midnight. .SATURDAY...Sunny and hot. Highs 102 to 108. .SATURDAY NIGHT...Mostly clear. Lows 64 to 73. .SUNDAY...Partly sunny and hot. Highs 98 to 104. .SUNDAY NIGHT...Partly cloudy. Lows 61 to 70. .MONDAY...Sunny and hot. Highs 96 to 102. .MONDAY NIGHT...Clear. Lows 60 to 69. .TUESDAY...Sunny and hot. Highs 98 to 104. .TUESDAY NIGHT...Clear. Lows 62 to 71. .WEDNESDAY...Sunny and hot. Highs 98 to 105. $$ AZZ534-538-191100- Aguila Valley-Tonopah Desert- Including the cities of Aguila, Gladden, Wickenburg, Arlington, Hassayampa, Tonopah, and Wintersburg 1131 PM MST Wed Mar 18 2026 ...EXTREME HEAT WARNING IN EFFECT FROM 11 AM THURSDAY TO 8 PM MST SUNDAY... .TONIGHT...Clear. Lows 60 to 70. Northwest wind 5 to 10 mph. .THURSDAY...Sunny and hot. Highs 100 to 105. Northeast wind 5 to 10 mph in the morning becoming southeast around 5 mph in the afternoon. .THURSDAY NIGHT...Clear. Lows 62 to 72. North wind around 5 mph. .FRIDAY...Sunny and hot. Highs 102 to 107. Northeast wind around 5 mph in the morning becoming southwest in the afternoon. .FRIDAY NIGHT...Clear. Lows 62 to 72. Northwest wind around 5 mph in the evening becoming north after midnight. .SATURDAY...Sunny and hot. Highs 100 to 106. .SATURDAY NIGHT...Clear in the evening then becoming partly cloudy. Lows 61 to 71. .SUNDAY...Partly sunny and hot. Highs 95 to 103. .SUNDAY NIGHT...Partly cloudy. Lows 59 to 69. .MONDAY...Mostly sunny and hot. Highs 94 to 102. .MONDAY NIGHT...Clear. Lows 58 to 68. .TUESDAY...Sunny and hot. Highs 97 to 103. .TUESDAY NIGHT...Clear. Lows 59 to 69. .WEDNESDAY...Sunny and hot. Highs 97 to 103. $$ AZZ531-533-191100- Kofa-Central La Paz- Including the cities of Palm Canyon, Brenda, Harcuvar, Quartzsite, Vicksburg, Vicksburg Junction, and Salome 1131 PM MST Wed Mar 18 2026 ...EXTREME HEAT WARNING IN EFFECT FROM 11 AM THURSDAY TO 8 PM MST SUNDAY... .TONIGHT...Clear. Lows 63 to 73. Northwest wind 5 to 10 mph in the evening becoming north around 5 mph after midnight. .THURSDAY...Sunny and hot. Highs 101 to 106. Northeast wind around 5 mph in the morning becoming northwest 5 to 10 mph in the afternoon. .THURSDAY NIGHT...Clear. Lows 65 to 75. North wind around 5 mph. .FRIDAY...Sunny and hot. Highs 103 to 108. Northeast wind around 5 mph in the morning becoming west 5 to 10 mph in the afternoon. .FRIDAY NIGHT...Clear. Lows 66 to 76. West wind 5 to 10 mph in the evening becoming northeast around 5 mph after midnight. .SATURDAY...Sunny and hot. Highs 99 to 107. .SATURDAY NIGHT...Partly cloudy. Lows 62 to 72. .SUNDAY...Partly sunny and hot. Highs 93 to 101. .SUNDAY NIGHT...Partly cloudy. Lows 60 to 70. .MONDAY...Sunny and hot. Highs 93 to 101. .MONDAY NIGHT...Clear. Lows 59 to 68. .TUESDAY...Sunny and hot. Highs 95 to 103. .TUESDAY NIGHT...Clear. Lows 61 to 71. .WEDNESDAY...Sunny and hot. Highs 95 to 103. $$ AZZ535-536-191100- Southeast Yuma County-Gila River Valley- Including the city of Ligurta 1131 PM MST Wed Mar 18 2026 ...EXTREME HEAT WARNING IN EFFECT FROM 11 AM THURSDAY TO 8 PM MST SUNDAY... .TONIGHT...Clear. Lows 60 to 70. West wind 5 to 10 mph in the evening becoming light after midnight. .THURSDAY...Sunny and hot. Highs 101 to 106. Northeast wind around 5 mph in the morning becoming northwest in the afternoon. .THURSDAY NIGHT...Clear. Lows 64 to 74. Northwest wind around 5 mph. .FRIDAY...Sunny and hot. Highs 103 to 108. Northeast wind around 5 mph in the morning becoming northwest in the afternoon. .FRIDAY NIGHT...Clear. Lows 64 to 74. West wind around 5 mph. .SATURDAY...Sunny and hot. Highs 104 to 108. .SATURDAY NIGHT...Clear in the evening then becoming partly cloudy. Lows 62 to 70. .SUNDAY...Partly sunny and hot. Highs 98 to 102. .SUNDAY NIGHT...Partly cloudy. Lows 58 to 68. .MONDAY...Sunny and hot. Highs 93 to 101. .MONDAY NIGHT...Clear. Lows 57 to 65. .TUESDAY...Sunny and hot. Highs 98 to 104. .TUESDAY NIGHT...Clear. Lows 60 to 68. .WEDNESDAY...Sunny and hot. Highs 99 to 105. $$ AZZ530-CAZ569-191100- Parker Valley-Palo Verde Valley- Including the cities of Parker, Ehrenberg, Martinez Lake, Blythe, Palo Verde, and Ripley 1131 PM MST Wed Mar 18 2026 /1131 PM PDT Wed Mar 18 2026/ ...EXTREME HEAT WARNING IN EFFECT UNTIL 8 PM MST /8 PM PDT/ SUNDAY... .TONIGHT...Clear. Lows 58 to 68. North wind around 5 mph. .THURSDAY...Sunny and hot. Highs 101 to 106. North wind 5 to 10 mph. .THURSDAY NIGHT...Clear. Lows 60 to 70. Northwest wind around 5 mph in the evening becoming north after midnight. .FRIDAY...Sunny and hot. Highs 103 to 108. North wind around 5 mph in the morning becoming west in the afternoon. .FRIDAY NIGHT...Clear. Lows 61 to 71. Southwest wind around 5 mph. .SATURDAY...Sunny and hot. Highs 103 to 108. .SATURDAY NIGHT...Partly cloudy. Lows 63 to 70. .SUNDAY...Partly sunny and hot. Highs 97 to 103. .SUNDAY NIGHT...Partly cloudy. Lows 60 to 68. .MONDAY...Sunny and hot. Highs 97 to 103. .MONDAY NIGHT...Clear. Lows 58 to 65. .TUESDAY...Sunny and hot. Highs 98 to 104. .TUESDAY NIGHT...Clear. Lows 60 to 67. .WEDNESDAY...Sunny and hot. Highs 99 to 105. $$ CAZ564-565-568-570-191100- Chuckwalla Mountains-Imperial County Southeast-Chiriaco Summit- Chuckwalla Valley- Including the cities of Imperial Hot Mineral Springs, Winterhaven, Chiriaco Summit, and Midland 1131 PM PDT Wed Mar 18 2026 ...EXTREME HEAT WARNING IN EFFECT UNTIL 8 PM PDT SUNDAY... .TONIGHT...Clear. Lows 64 to 74. Northwest wind 5 to 10 mph. .THURSDAY...Sunny and hot. Highs 101 to 106. North wind 5 to 10 mph. .THURSDAY NIGHT...Clear. Lows 66 to 76. Northwest wind 5 to 10 mph. .FRIDAY...Sunny and hot. Highs 103 to 108. North wind 5 to 10 mph in the morning becoming south in the afternoon. .FRIDAY NIGHT...Clear. Lows 66 to 76. Southwest wind 5 to 10 mph in the evening becoming northwest after midnight. .SATURDAY...Sunny and hot. Highs 97 to 107. .SATURDAY NIGHT...Partly cloudy. Lows 65 to 73. .SUNDAY...Partly sunny and hot. Highs 92 to 102. .SUNDAY NIGHT...Partly cloudy. Lows 62 to 70. .MONDAY...Sunny and hot. Highs 92 to 102. .MONDAY NIGHT...Clear. Lows 60 to 68. .TUESDAY...Sunny and hot. Highs 93 to 103. .TUESDAY NIGHT...Clear. Lows 62 to 71. .WEDNESDAY...Sunny and hot. Highs 93 to 105. $$ CAZ563-567-191100- Salton Sea-Imperial Valley- Including the cities of Desert Shores, El Centro, Calexico, Alamorio, and Brawley 1131 PM PDT Wed Mar 18 2026 ...EXTREME HEAT WARNING IN EFFECT UNTIL 8 PM PDT SUNDAY... .TONIGHT...Clear. Lows 62 to 72. Southwest wind around 5 mph in the evening becoming west after midnight. .THURSDAY...Sunny and hot. Highs 103 to 108. South wind around 5 mph in the morning becoming northeast in the afternoon. .THURSDAY NIGHT...Clear. Lows 64 to 74. Northwest wind around 5 mph. .FRIDAY...Sunny and very hot. Highs 105 to 110. Southeast wind around 5 mph. .FRIDAY NIGHT...Clear. Lows 65 to 75. West wind 5 to 10 mph. .SATURDAY...Sunny and very hot. Highs 100 to 110. .SATURDAY NIGHT...Partly cloudy. Lows 64 to 73. .SUNDAY...Partly sunny and hot. Highs 96 to 104. .SUNDAY NIGHT...Partly cloudy in the evening then becoming clear. Lows 62 to 73. .MONDAY...Sunny and hot. Highs 96 to 104. .MONDAY NIGHT...Clear. Lows 60 to 70. .TUESDAY...Sunny and hot. Highs 95 to 103. .TUESDAY NIGHT...Clear. Lows 62 to 73. .WEDNESDAY...Sunny and hot. Highs 97 to 107. $$ CAZ566-191100- Imperial County West- Including the cities of Coolidge Springs, Salton City, Winona, Coyote Wells, Ocotillo, and Plaster City 1131 PM PDT Wed Mar 18 2026 ...EXTREME HEAT WARNING IN EFFECT UNTIL 8 PM PDT SUNDAY... .TONIGHT...Clear. Lows 67 to 77. West wind 5 to 10 mph. .THURSDAY...Sunny and hot. Highs 102 to 107. Northwest wind around 5 mph in the morning becoming east in the afternoon. .THURSDAY NIGHT...Clear. Lows 68 to 78. West wind 5 to 10 mph. .FRIDAY...Sunny and hot. Highs 104 to 109. Northwest wind 5 to 10 mph in the morning becoming east around 5 mph in the afternoon. .FRIDAY NIGHT...Clear. Lows 68 to 78. West wind 5 to 15 mph. .SATURDAY...Mostly sunny and hot. Highs 105 to 109. .SATURDAY NIGHT...Partly cloudy. Lows 65 to 75. .SUNDAY...Partly sunny and hot. Highs 100 to 104. .SUNDAY NIGHT...Partly cloudy in the evening then becoming clear. Lows 65 to 75. .MONDAY...Sunny and hot. Highs 100 to 104. .MONDAY NIGHT...Clear. Lows 62 to 73. .TUESDAY...Sunny and hot. Highs 99 to 103. .TUESDAY NIGHT...Clear. Lows 64 to 75. .WEDNESDAY...Sunny and hot. Highs 102 to 106. $$ CAZ562-191100- Imperial County Southwest- Including the city of Mountain Spring 1131 PM PDT Wed Mar 18 2026 ...EXTREME HEAT WARNING IN EFFECT UNTIL 8 PM PDT SUNDAY... .TONIGHT...Clear. Lows 71 to 81. Southwest wind 10 to 15 mph. .THURSDAY...Sunny and hot. Highs 101 to 106. Northwest wind 5 to 10 mph in the morning becoming northeast in the afternoon. .THURSDAY NIGHT...Clear. Lows 73 to 83. Southwest wind 5 to 10 mph. .FRIDAY...Sunny and hot. Highs 103 to 108. Southwest wind 5 to 10 mph in the morning becoming southeast in the afternoon. .FRIDAY NIGHT...Clear. Lows 72 to 82. Southwest wind 10 to 20 mph. .SATURDAY...Sunny and hot. Highs 98 to 108. .SATURDAY NIGHT...Partly cloudy. Lows 67 to 78. .SUNDAY...Partly sunny and hot. Highs 93 to 103. .SUNDAY NIGHT...Mostly clear. Lows 68 to 79. .MONDAY...Sunny and hot. Highs 94 to 104. .MONDAY NIGHT...Clear. Lows 66 to 77. .TUESDAY...Sunny and hot. Highs 93 to 103. .TUESDAY NIGHT...Clear. Lows 67 to 78. .WEDNESDAY...Sunny and hot. Highs 95 to 105. $$ CAZ560-191100- Joshua Tree NP West- Including the cities of Cottonwood Visitor and Lost Horse-Keys Village 1131 PM PDT Wed Mar 18 2026 .TONIGHT...Clear. Lows 62 to 72. Northwest wind 5 to 10 mph. .THURSDAY...Sunny. Highs 86 to 96. North wind 5 to 10 mph in the morning becoming southeast in the afternoon. .THURSDAY NIGHT...Clear. Lows 64 to 74. Southwest wind around 5 mph in the evening becoming northwest 5 to 10 mph after midnight. .FRIDAY...Sunny. Highs 87 to 97. North wind 5 to 10 mph in the morning becoming south in the afternoon. .FRIDAY NIGHT...Clear. Lows 62 to 72. West wind 5 to 10 mph. .SATURDAY...Sunny. Highs 84 to 94. .SATURDAY NIGHT...Partly cloudy. Lows 55 to 68. .SUNDAY...Partly sunny. Highs 81 to 91. .SUNDAY NIGHT...Partly cloudy in the evening then becoming clear. Lows 55 to 69. .MONDAY...Sunny. Highs 81 to 91. .MONDAY NIGHT...Clear. Lows 54 to 67. .TUESDAY...Sunny. Highs 82 to 92. .TUESDAY NIGHT...Clear. Lows 57 to 69. .WEDNESDAY...Sunny. Highs 82 to 92. $$ CAZ561-191100- Joshua Tree NP East- 1131 PM PDT Wed Mar 18 2026 ...EXTREME HEAT WARNING IN EFFECT UNTIL 8 PM PDT SUNDAY... .TONIGHT...Clear. Lows 61 to 71. Northwest wind 5 to 10 mph. .THURSDAY...Sunny and hot. Highs 92 to 102. Northwest wind 5 to 10 mph in the morning becoming east around 5 mph in the afternoon. .THURSDAY NIGHT...Clear. Lows 63 to 73. South wind around 5 mph in the evening becoming west 5 to 10 mph after midnight. .FRIDAY...Sunny and hot. Highs 94 to 104. Northwest wind 5 to 10 mph in the morning becoming southeast in the afternoon. .FRIDAY NIGHT...Clear. Lows 62 to 72. West wind 5 to 10 mph. .SATURDAY...Sunny and hot. Highs 95 to 103. .SATURDAY NIGHT...Partly cloudy. Lows 65 to 70. .SUNDAY...Partly sunny. Not as warm. Highs 89 to 97. .SUNDAY NIGHT...Partly cloudy. Lows 63 to 69. .MONDAY...Sunny. Highs 91 to 99. .MONDAY NIGHT...Clear. Lows 62 to 67. .TUESDAY...Sunny and hot. Highs 92 to 100. .TUESDAY NIGHT...Clear. Lows 64 to 69. .WEDNESDAY...Sunny and hot. Highs 92 to 100. $$ Visit us on Facebook, Twitter, and at weather.gov/phoenix