FPUS55 KMSO 201828 ZFPMSO Zone Forecast Product National Weather Service Missoula MT 1228 PM MDT Wed May 20 2026 MTZ001-211000- Kootenai/Cabinet Region- Including the cities of Libby and Eureka 1228 PM MDT Wed May 20 2026 .TONIGHT...Mostly cloudy early in the evening then clearing. A 50 percent chance of areas of rain early in the evening. Patchy fog after midnight. Areas of fog late in the night. Lows in the 30s. .THURSDAY...Mostly sunny. Highs in the upper 60s to mid 70s. .THURSDAY NIGHT...Mostly cloudy. Lows in the upper 30s to mid 40s. .FRIDAY...Mostly sunny. Highs in the 70s. .FRIDAY NIGHT...Mostly clear. Lows in the 40s. .SATURDAY...Partly cloudy. Highs in the mid 70s to lower 80s. .SATURDAY NIGHT...Mostly clear. Lows in the 40s. .SUNDAY...Mostly sunny. Highs in the mid 70s to lower 80s. .SUNDAY NIGHT...Partly cloudy. Lows in the 40s to lower 50s. .MEMORIAL DAY...Partly cloudy. A 20 percent chance of rain in the afternoon. Highs in the upper 60s to mid 70s. .MONDAY NIGHT...Mostly cloudy with a 50 percent chance of rain. Lows in the 40s. .TUESDAY...Mostly cloudy with a 30 percent chance of rain. Highs in the mid 60s to lower 70s. .TUESDAY NIGHT...Mostly cloudy with a 30 percent chance of rain. Lows in the 40s. .WEDNESDAY...Mostly cloudy with a 30 percent chance of rain. Highs in the upper 60s to mid 70s. $$ MTZ002-211000- West Glacier Region- Including the city of Swan Lake 1228 PM MDT Wed May 20 2026 .TONIGHT...Rain showers likely, slight chance of thunderstorms and snow early in the evening, then partly cloudy in the late evening and overnight. Patchy fog late in the night. Chance of precipitation 60 percent. Snow level 6000 feet. No snow accumulation. Lows in the 30s. .THURSDAY...Partly cloudy. Highs in the upper 50s to mid 60s. .THURSDAY NIGHT...Mostly cloudy in the evening then becoming partly cloudy. Lows in the mid 30s to lower 40s. .FRIDAY...Partly cloudy. Highs in the 60s. .FRIDAY NIGHT...Partly cloudy. Lows in the upper 30s to mid 40s. .SATURDAY...Partly cloudy. Highs in the mid 60s to lower 70s. .SATURDAY NIGHT...Mostly clear. Lows in the 40s. .SUNDAY...Mostly sunny. Highs in the mid 60s to lower 70s. .SUNDAY NIGHT...Partly cloudy. Lows in the 40s. .MEMORIAL DAY...Partly cloudy. A 20 percent chance of rain in the afternoon. Highs in the 60s to lower 70s. .MONDAY NIGHT...Mostly cloudy with a 40 percent chance of rain. Lows in the 40s. .TUESDAY...Mostly cloudy with a 50 percent chance of rain. Highs in the mid 50s to lower 60s. .TUESDAY NIGHT...Mostly cloudy with a 50 percent chance of rain. Lows in the upper 30s to mid 40s. .WEDNESDAY...Mostly cloudy with a 40 percent chance of rain. Highs in the upper 50s to mid 60s. $$ MTZ003-211000- Flathead/Mission Valleys- Including the cities of Kalispell, Polson, and St. Ignatius 1228 PM MDT Wed May 20 2026 .TONIGHT...Rain showers likely and a slight chance of thunderstorms early in the evening, then mostly cloudy with a slight chance of rain late in the evening. Partly cloudy after midnight. Chance of precipitation 70 percent. Lows in the 30s. .THURSDAY...Mostly sunny. Highs in the 60s. .THURSDAY NIGHT...Mostly cloudy. Lows in the upper 30s to mid 40s. .FRIDAY...Mostly sunny. Highs in the upper 60s to mid 70s. .FRIDAY NIGHT...Mostly clear. Lows in the 40s. .SATURDAY...Partly cloudy. Highs in the 70s. .SATURDAY NIGHT...Mostly clear. Lows in the 40s to lower 50s. .SUNDAY...Partly cloudy. Highs in the 70s. .SUNDAY NIGHT...Partly cloudy. Lows in the mid 40s to lower 50s. .MEMORIAL DAY...Partly cloudy. A 20 percent chance of rain in the afternoon. Highs in the upper 60s to mid 70s. .MONDAY NIGHT...Mostly cloudy with a 30 percent chance of rain. Lows in the 40s. .TUESDAY...Mostly cloudy with a 30 percent chance of rain. Highs in the 60s to lower 70s. .TUESDAY NIGHT...Mostly cloudy with a 40 percent chance of rain. Lows in the 40s. .WEDNESDAY...Mostly cloudy with a 30 percent chance of rain. Highs in the mid 60s to lower 70s. $$ MTZ004-211000- Lower Clark Fork Region- Including the cities of Noxon, Thompson Falls, and Superior 1228 PM MDT Wed May 20 2026 .TONIGHT...Rain showers likely and a chance of thunderstorms early in the evening, then partly cloudy with areas of rain in the late evening and early morning. Mostly clear late in the night. Patchy fog after midnight. Areas of fog late in the night. Chance of precipitation 70 percent. Lows in the 30s to lower 40s. .THURSDAY...Mostly sunny. Highs in the 60s. .THURSDAY NIGHT...Mostly cloudy. Lows in the mid 30s to lower 40s. .FRIDAY...Mostly sunny. Highs in the upper 60s to mid 70s. .FRIDAY NIGHT...Mostly clear. Lows in the upper 30s to mid 40s. .SATURDAY...Mostly sunny. Highs in the 70s. .SATURDAY NIGHT...Mostly clear. Lows in the 40s. .SUNDAY...Mostly sunny. Highs in the 70s. .SUNDAY NIGHT...Partly cloudy. Lows in the 40s. .MEMORIAL DAY...Partly cloudy. A 20 percent chance of rain in the afternoon. Highs in the upper 60s to mid 70s. .MONDAY NIGHT...Mostly cloudy with a 50 percent chance of rain. Lows in the upper 30s to mid 40s. .TUESDAY...Mostly cloudy with a 50 percent chance of rain. Highs in the upper 50s to mid 60s. .TUESDAY NIGHT...Mostly cloudy with a 50 percent chance of rain. Lows in the upper 30s to mid 40s. .WEDNESDAY...Mostly cloudy with a 40 percent chance of rain. Highs in the 60s. $$ MTZ005-211000- Missoula/Bitterroot Valleys- Including the cities of Hamilton and Darby 1228 PM MDT Wed May 20 2026 .TONIGHT...Rain showers likely and a chance of thunderstorms in the evening, then areas of rain after midnight. Patchy fog after midnight. Areas of fog late in the night. Chance of precipitation 90 percent. Lows in the mid to upper 30s. .THURSDAY...Mostly sunny. Highs in the lower to mid 60s. .THURSDAY NIGHT...Partly cloudy in the evening then becoming mostly cloudy. Lows near 40. .FRIDAY...Mostly sunny. Highs in the lower 70s. .FRIDAY NIGHT...Mostly clear. Lows in the lower to mid 40s. .SATURDAY...Mostly sunny. Highs in the mid to upper 70s. .SATURDAY NIGHT...Partly cloudy. Lows in the mid to upper 40s. .SUNDAY...Partly cloudy. Highs in the mid to upper 70s. .SUNDAY NIGHT...Partly cloudy. Lows in the mid to upper 40s. .MEMORIAL DAY...Partly cloudy. A 20 percent chance of rain in the afternoon. Highs in the mid to upper 70s. .MONDAY NIGHT...Mostly cloudy with a 30 percent chance of rain. Lows in the lower to mid 40s. .TUESDAY...Mostly cloudy with a 50 percent chance of rain. Highs in the mid to upper 60s. .TUESDAY NIGHT...Mostly cloudy. Chance of rain showers and a slight chance of thunderstorms in the evening, then a chance of rain after midnight. Chance of precipitation 50 percent. Lows in the lower to mid 40s. .WEDNESDAY...Mostly cloudy. A chance of rain in the morning, then chance of rain showers and a slight chance of thunderstorms in the afternoon. Chance of precipitation 50 percent. Highs in the mid to upper 60s. $$ MTZ006-211000- Bitterroot/Sapphire Mountains- Including the city of Sula 1228 PM MDT Wed May 20 2026 .TONIGHT...Rain showers, snow showers likely and a slight chance of thunderstorms in the evening, then areas of rain and snow after midnight. Chance of precipitation 70 percent. Little or no new snow accumulation. Lows in the 30s. Northwest winds to 15 mph in the evening. .THURSDAY...Mostly cloudy in the morning then clearing. Highs in the 50s to lower 60s. .THURSDAY NIGHT...Partly cloudy. Lows in the 30s. .FRIDAY...Partly cloudy. Highs in the 60s. .FRIDAY NIGHT...Mostly clear. Lows in the mid 30s to lower 40s. .SATURDAY...Mostly sunny. Highs in the upper 60s to mid 70s. .SATURDAY NIGHT...Partly cloudy. Lows in the upper 30s to mid 40s. .SUNDAY...Partly cloudy. Highs in the 70s. .SUNDAY NIGHT...Partly cloudy. Lows in the upper 30s to mid 40s. .MEMORIAL DAY...Partly cloudy. Highs in the 70s. .MONDAY NIGHT...Mostly cloudy with a 20 percent chance of rain. Lows in the mid 30s to lower 40s. .TUESDAY...A chance of rain in the morning, then rain showers likely and a slight chance of thunderstorms in the afternoon. Chance of precipitation 60 percent. Highs in the upper 50s to mid 60s. .TUESDAY NIGHT...Mostly cloudy. Chance of rain showers and a slight chance of thunderstorms in the evening, then a chance of rain after midnight. Chance of precipitation 50 percent. Lows in the mid 30s to lower 40s. .WEDNESDAY...Mostly cloudy. A chance of rain in the morning, then chance of rain showers and a slight chance of thunderstorms in the afternoon. Chance of precipitation 50 percent. Highs in the mid 50s to lower 60s. $$ MTZ007-211000- Butte/Blackfoot Region- Including the cities of Anaconda, Deer Lodge, and Drummond 1228 PM MDT Wed May 20 2026 .TONIGHT...Rain showers likely and a chance of thunderstorms in the evening. Snow likely late in the evening, then areas of rain and snow after midnight. Areas of fog after midnight. Chance of precipitation 90 percent. No snow accumulation. Lows in the upper 20s to mid 30s. North winds to 15 mph in the evening. .THURSDAY...Mostly cloudy. A 20 percent chance of snow in the morning. Highs in the 50s. North winds to 15 mph. .THURSDAY NIGHT...Partly cloudy. Lows in the upper 20s to mid 30s. .FRIDAY...Partly cloudy. Highs in the 60s. .FRIDAY NIGHT...Partly cloudy. Lows in the mid 30s to lower 40s. .SATURDAY...Mostly sunny. Highs in the upper 60s to mid 70s. .SATURDAY NIGHT...Partly cloudy. Lows in the upper 30s to mid 40s. .SUNDAY...Partly cloudy. Highs in the 70s. .SUNDAY NIGHT...Partly cloudy. Lows in the upper 30s to mid 40s. .MEMORIAL DAY...Partly cloudy. A 20 percent chance of showers and thunderstorms in the afternoon. Highs in the 70s. .MONDAY NIGHT...Mostly cloudy with a 20 percent chance of rain. Lows in the upper 30s to mid 40s. .TUESDAY...A chance of rain in the morning, then rain showers likely and a slight chance of thunderstorms in the afternoon. Chance of precipitation 70 percent. Highs in the 60s. .TUESDAY NIGHT...Mostly cloudy. Chance of rain showers and a slight chance of thunderstorms in the evening, then a chance of rain after midnight. Chance of precipitation 50 percent. Lows in the mid 30s to lower 40s. .WEDNESDAY...Mostly cloudy. A chance of rain in the morning, then chance of rain showers and a slight chance of thunderstorms in the afternoon. Chance of precipitation 50 percent. Highs in the 60s. $$ MTZ043-211000- Potomac/Seeley Lake Region- Including the cities of East Missoula, Seeley Lake, and Clinton 1228 PM MDT Wed May 20 2026 .TONIGHT...Becoming partly cloudy late in the night. Rain showers likely and a chance of thunderstorms early in the evening, then areas of rain in the late evening and early morning. Patchy fog after midnight. Chance of precipitation 90 percent. Lows in the 30s. .THURSDAY...Partly cloudy. Highs in the mid 50s to lower 60s. .THURSDAY NIGHT...Partly cloudy. Lows in the 30s to lower 40s. .FRIDAY...Partly cloudy. Highs in the 60s. .FRIDAY NIGHT...Mostly clear. Lows in the upper 30s to mid 40s. .SATURDAY...Partly cloudy. Highs in the mid 60s to lower 70s. .SATURDAY NIGHT...Mostly clear. Lows in the 40s. .SUNDAY...Partly cloudy. Highs in the upper 60s to mid 70s. .SUNDAY NIGHT...Partly cloudy. Lows in the 40s. .MEMORIAL DAY...Partly cloudy. Highs in the upper 60s to mid 70s. .MONDAY NIGHT...Mostly cloudy with a 40 percent chance of rain. Lows in the 40s. .TUESDAY...Mostly cloudy with a 50 percent chance of rain. Highs in the upper 50s to mid 60s. .TUESDAY NIGHT...Mostly cloudy. Chance of rain showers and a slight chance of thunderstorms in the evening, then a chance of rain after midnight. Chance of precipitation 50 percent. Lows in the upper 30s to mid 40s. .WEDNESDAY...Mostly cloudy. A chance of rain in the morning, then chance of rain showers and a slight chance of thunderstorms in the afternoon. Chance of precipitation 40 percent. Highs in the 60s. $$ IDZ009-211000- Western Lemhi County- Including the city of Shoup 1228 PM MDT Wed May 20 2026 .TONIGHT...Becoming partly cloudy late in the night. Rain likely through the night. Slight chance of thunderstorms in the evening, then areas of snow after midnight. Chance of precipitation 60 percent. No snow accumulation. Lows in the mid 30s to lower 40s. North winds to 15 mph in the evening. .THURSDAY...Mostly sunny. Highs in the upper 50s to mid 60s. .THURSDAY NIGHT...Partly cloudy in the evening then becoming mostly cloudy. Lows in the upper 30s to mid 40s. .FRIDAY...Partly cloudy. Highs in the mid 60s to lower 70s. .FRIDAY NIGHT...Mostly clear. Lows in the 40s. .SATURDAY...Mostly sunny. Highs in the 70s. .SATURDAY NIGHT...Partly cloudy. Lows in the 40s to lower 50s. .SUNDAY...Partly cloudy. Highs in the mid 70s to lower 80s. .SUNDAY NIGHT...Partly cloudy. Lows in the mid 40s to lower 50s. .MEMORIAL DAY...Partly cloudy. Highs in the 70s. .MONDAY NIGHT...Mostly cloudy with a 20 percent chance of rain. Lows in the 40s. .TUESDAY...A chance of rain in the morning, then rain showers likely and a slight chance of thunderstorms in the afternoon. Chance of precipitation 60 percent. Highs in the 60s. .TUESDAY NIGHT...Mostly cloudy. Chance of rain showers and a slight chance of thunderstorms in the evening, then a chance of rain after midnight. Chance of precipitation 50 percent. Lows in the upper 30s to mid 40s. .WEDNESDAY...Mostly cloudy. A chance of rain in the morning, then chance of rain showers and a slight chance of thunderstorms in the afternoon. Chance of precipitation 50 percent. Highs in the 60s. $$ IDZ010-211000- Eastern Lemhi County- Including the cities of Salmon and Leadore 1228 PM MDT Wed May 20 2026 .TONIGHT...Rain showers, snow showers likely and a slight chance of thunderstorms in the evening, then areas of rain and snow after midnight. Chance of precipitation 70 percent. No snow accumulation. Lows in the 30s. Northwest winds to 15 mph in the evening. .THURSDAY...Partly cloudy. A 50 percent chance of rain and snow in the morning. Highs in the upper 50s to mid 60s. North winds to 15 mph. .THURSDAY NIGHT...Partly cloudy. Lows in the 30s. .FRIDAY...Partly cloudy. Highs in the mid 60s to lower 70s. .FRIDAY NIGHT...Partly cloudy. Lows in the mid 30s to lower 40s. .SATURDAY...Mostly sunny. Highs in the 70s. .SATURDAY NIGHT...Partly cloudy. Lows in the 40s. .SUNDAY...Partly cloudy. Highs in the mid 70s to lower 80s. .SUNDAY NIGHT...Partly cloudy. Lows in the 40s. .MEMORIAL DAY...Partly cloudy. A 20 percent chance of showers and thunderstorms in the afternoon. Highs in the 70s to lower 80s. .MONDAY NIGHT...Partly cloudy with a 20 percent chance of rain. Lows in the 40s. .TUESDAY...Mostly cloudy. A chance of rain in the morning, then chance of rain showers and a slight chance of thunderstorms in the afternoon. Chance of precipitation 50 percent. Highs in the 60s to lower 70s. .TUESDAY NIGHT...Mostly cloudy. Chance of rain showers and a slight chance of thunderstorms in the evening, then a chance of rain after midnight. Chance of precipitation 50 percent. Lows in the upper 30s to mid 40s. .WEDNESDAY...Mostly cloudy. A chance of rain in the morning, then chance of rain showers and a slight chance of thunderstorms in the afternoon. Chance of precipitation 50 percent. Highs in the 60s. $$ IDZ005-211000- Northern Clearwater Mountains- Including the cities of Pierce and Elk River 1128 AM PDT Wed May 20 2026 .TONIGHT...Mostly cloudy with a chance of rain showers and a slight chance of thunderstorms in the evening, then mostly clear after midnight. Chance of precipitation 50 percent. Lows in the 30s. .THURSDAY...Mostly sunny. Highs in the mid 60s to lower 70s. .THURSDAY NIGHT...Mostly cloudy. Lows in the mid 30s to lower 40s. .FRIDAY...Mostly sunny. Highs in the 70s. .FRIDAY NIGHT...Mostly clear. Lows in the mid 30s to lower 40s. .SATURDAY...Mostly sunny. Highs in the mid 70s to lower 80s. .SATURDAY NIGHT...Partly cloudy. Lows in the 40s. .SUNDAY...Mostly sunny. Highs in the 70s. .SUNDAY NIGHT...Partly cloudy. Lows in the upper 30s to mid 40s. .MEMORIAL DAY...Partly cloudy. Highs in the upper 60s to mid 70s. .MONDAY NIGHT...Mostly cloudy with a 40 percent chance of rain. Lows in the mid 30s to lower 40s. .TUESDAY...Mostly cloudy with a 40 percent chance of rain. Highs in the mid 50s to lower 60s. .TUESDAY NIGHT...Mostly cloudy with a 40 percent chance of rain. Lows in the mid 30s to lower 40s. .WEDNESDAY...Mostly cloudy with a 30 percent chance of rain. Highs in the mid 50s to lower 60s. $$ IDZ006-211000- Southern Clearwater Mountains- Including the cities of Powell, Elk City, and Dixie 1128 AM PDT Wed May 20 2026 .TONIGHT...Mostly cloudy with a chance of rain showers and a slight chance of thunderstorms in the evening, then mostly cloudy with a slight chance of rain after midnight. Partly cloudy late in the night. Areas of fog after midnight. Chance of precipitation 50 percent. Lows 30 to 44. Northwest winds to 15 mph in the evening. .THURSDAY...Mostly sunny. Highs 56 to 69. .THURSDAY NIGHT...Partly cloudy in the evening then becoming mostly cloudy. Lows 33 to 48. .FRIDAY...Mostly sunny. Highs 60 to 75. .FRIDAY NIGHT...Mostly clear. Lows 35 to 50. .SATURDAY...Mostly sunny. Highs 66 to 81. .SATURDAY NIGHT...Partly cloudy. Lows 37 to 52. .SUNDAY...Mostly sunny. Highs 68 to 82. .SUNDAY NIGHT...Partly cloudy. Lows 37 to 51. .MEMORIAL DAY...Partly cloudy. Highs 65 to 78. .MONDAY NIGHT...Mostly cloudy with a 40 percent chance of rain. Lows 34 to 47. .TUESDAY...Mostly cloudy with a 50 percent chance of rain. Highs in the 50s to lower 60s. .TUESDAY NIGHT...Mostly cloudy with a 50 percent chance of rain. Lows 32 to 45. .WEDNESDAY...Mostly cloudy with a 40 percent chance of rain. Highs in the lower 50s to mid 60s. $$ IDZ007-211000- Orofino/Grangeville Region- Including the city of Kooskia 1128 AM PDT Wed May 20 2026 .TONIGHT...Mostly cloudy with a chance of rain showers and a slight chance of thunderstorms in the evening, then partly cloudy with areas of rain after midnight. Mostly clear late in the night. Chance of precipitation 50 percent. Lows in the upper 30s to mid 40s. Northwest winds to 15 mph in the evening. .THURSDAY...Mostly sunny. Highs in the 60s to mid 70s. .THURSDAY NIGHT...Mostly cloudy. Lows in the 40s. .FRIDAY...Mostly sunny. Highs in the 70s to lower 80s. .FRIDAY NIGHT...Mostly clear. Lows in the 40s to lower 50s. .SATURDAY...Mostly sunny. Highs in the 70s to mid 80s. .SATURDAY NIGHT...Partly cloudy. Lows in the mid 40s to lower 50s. .SUNDAY...Mostly sunny. Highs in the mid 70s to lower 80s. .SUNDAY NIGHT...Partly cloudy. Lows in the mid 40s to lower 50s. .MEMORIAL DAY...Partly cloudy. A 20 percent chance of rain in the afternoon. Highs in the 70s. .MONDAY NIGHT...Mostly cloudy with a 50 percent chance of rain. Lows in the 40s. .TUESDAY...Mostly cloudy with a 50 percent chance of rain. Highs in the 50s to mid 60s. .TUESDAY NIGHT...Mostly cloudy with a 50 percent chance of rain. Lows in the 40s. .WEDNESDAY...Mostly cloudy with a 40 percent chance of rain. Highs in the upper 50s to mid 60s. $$ IDZ008-211000- Lower Hells Canyon/Salmon River Region- Including the cities of Riggins and White Bird 1128 AM PDT Wed May 20 2026 .TONIGHT...Partly cloudy with a slight chance of showers and thunderstorms early in the evening, then mostly cloudy with areas of rain in the late evening and early morning. Mostly clear late in the night. Chance of precipitation 40 percent. Lows in the 40s. North winds 15 to 20 mph with gusts to around 30 mph in the evening. .THURSDAY...Mostly sunny. Highs in the lower 60s to mid 70s. North winds to 15 mph. .THURSDAY NIGHT...Mostly cloudy. Lows in the mid 40s to lower 50s. East winds to 15 mph. .FRIDAY...Mostly sunny. Highs 69 to 82. .FRIDAY NIGHT...Mostly clear. Lows in the upper 40s to mid 50s. East winds to 15 mph. .SATURDAY...Mostly sunny. Highs 74 to 88. .SATURDAY NIGHT...Partly cloudy. Lows in the 50s. .SUNDAY...Mostly sunny. Highs 75 to 88. .SUNDAY NIGHT...Partly cloudy. Lows in the 50s. .MEMORIAL DAY...Partly cloudy. Highs 71 to 84. .MONDAY NIGHT...Mostly cloudy with a 40 percent chance of rain. Lows in the 40s to lower 50s. .TUESDAY...Mostly cloudy with a 50 percent chance of rain. Highs in the 50s to mid 60s. .TUESDAY NIGHT...Mostly cloudy. Chance of rain showers and a slight chance of thunderstorms in the evening, then a chance of rain after midnight. Chance of precipitation 50 percent. Lows in the 40s. .WEDNESDAY...Mostly cloudy with a 50 percent chance of rain. Highs in the 50s to upper 60s. $$