FPCN12 CWTO 201515 FORECASTS FOR NORTHERN ONTARIO ISSUED BY ENVIRONMENT CANADA AT 11:30 A.M. EDT WEDNESDAY 20 MAY 2026 FOR TODAY AND THURSDAY. THE NEXT SCHEDULED FORECAST WILL BE ISSUED AT 4:00 P.M. EDT. CITY OF THUNDER BAY. TODAY..A MIX OF SUN AND CLOUD. HIGH 12. UV INDEX 6 OR HIGH. TONIGHT..CLEAR. LOW ZERO WITH PATCHY FROST. THURSDAY..SUNNY. HIGH 10. UV INDEX 6 OR HIGH. KENORA - GRASSY NARROWS - WHITEDOG. TODAY..SUNNY. HIGH 14. UV INDEX 6 OR HIGH. TONIGHT..CLEAR. BECOMING PARTLY CLOUDY THIS EVENING. LOW 6. THURSDAY..SUNNY EARLY IN THE MORNING THEN A MIX OF SUN AND CLOUD WITH 40 PERCENT CHANCE OF SHOWERS. WIND SOUTH 30 KM/H GUSTING TO 50. HIGH 19. UV INDEX 6 OR HIGH. SIOUX NARROWS - NESTOR FALLS - MORSON. TODAY..SUNNY. HIGH 14. UV INDEX 6 OR HIGH. TONIGHT..A FEW CLOUDS. LOW 6. THURSDAY..SUNNY. WIND BECOMING SOUTH 30 KM/H GUSTING TO 50 IN THE MORNING. HIGH 19. UV INDEX 6 OR HIGH. DRYDEN - VERMILION BAY. TODAY..MAINLY SUNNY. HIGH 13. UV INDEX 6 OR HIGH. TONIGHT..CLEAR. INCREASING CLOUDINESS AFTER MIDNIGHT. LOW PLUS 3 WITH RISK OF FROST. THURSDAY..CLEARING IN THE MORNING. WIND BECOMING SOUTH 20 KM/H GUSTING TO 40 IN THE MORNING. HIGH 16. UV INDEX 6 OR HIGH. IGNACE - ENGLISH RIVER. TODAY..MAINLY SUNNY. HIGH 12. UV INDEX 6 OR HIGH. TONIGHT..CLEAR. LOW PLUS 1 WITH PATCHY FROST. THURSDAY..A MIX OF SUN AND CLOUD. BECOMING SUNNY IN THE MORNING. WIND BECOMING SOUTH 20 KM/H GUSTING TO 40 IN THE MORNING. HIGH 16. UV INDEX 6 OR HIGH. FORT FRANCES - EMO - RAINY RIVER. TODAY..A MIX OF SUN AND CLOUD. HIGH 14. UV INDEX 6 OR HIGH. TONIGHT..CLEAR. LOW PLUS 4. THURSDAY..SUNNY. WIND SOUTH 20 KM/H GUSTING TO 40. HIGH 18. UV INDEX 6 OR HIGH. SEINE RIVER VILLAGE - MINE CENTRE. TODAY..MAINLY SUNNY. HIGH 14. UV INDEX 6 OR HIGH. TONIGHT..CLEAR. LOW PLUS 4. THURSDAY..SUNNY. WIND BECOMING SOUTH 20 KM/H GUSTING TO 40 IN THE MORNING. HIGH 18. UV INDEX 6 OR HIGH. ATIKOKAN - SHEBANDOWAN - QUETICO PARK. TODAY..A MIX OF SUN AND CLOUD. HIGH 13. UV INDEX 6 OR HIGH. TONIGHT..CLEAR. LOW MINUS 1 WITH FROST. THURSDAY..SUNNY. WIND BECOMING SOUTH 20 KM/H GUSTING TO 40 IN THE MORNING THEN LIGHT IN THE AFTERNOON. HIGH 16. UV INDEX 6 OR HIGH. UPSALA - RAITH. TODAY..A MIX OF SUN AND CLOUD. HIGH 11. UV INDEX 6 OR HIGH. TONIGHT..CLEARING THIS EVENING. WIND UP TO 15 KM/H. LOW MINUS 2 WITH FROST. WIND CHILL MINUS 6 OVERNIGHT. THURSDAY..SUNNY. WIND SOUTH 20 KM/H BECOMING LIGHT NEAR NOON. HIGH 16. UV INDEX 6 OR HIGH. CLOUD BAY - DORION. TODAY..A MIX OF SUN AND CLOUD. HIGH 12. UV INDEX 6 OR HIGH. TONIGHT..CLEAR. LOW ZERO WITH PATCHY FROST. THURSDAY..SUNNY. WIND SOUTH 20 KM/H GUSTING TO 40. HIGH 10. UV INDEX 6 OR HIGH. KAKABEKA FALLS - WHITEFISH LAKE - ARROW LAKE. TODAY..A MIX OF SUN AND CLOUD. HIGH 13. UV INDEX 6 OR HIGH. TONIGHT..CLEAR. LOW ZERO WITH PATCHY FROST. THURSDAY..SUNNY. WIND SOUTH 20 KM/H BECOMING LIGHT LATE IN THE MORNING. HIGH 15. UV INDEX 6 OR HIGH. RED LAKE - WOODLAND CARIBOU PARK. TODAY..SUNNY. HIGH 13. UV INDEX 5 OR MODERATE. TONIGHT..CLEAR THIS EVENING THEN PARTLY CLOUDY WITH 60 PERCENT CHANCE OF SHOWERS OVERNIGHT. LOW PLUS 3 WITH RISK OF FROST. THURSDAY..SHOWERS. WIND BECOMING SOUTH 30 KM/H GUSTING TO 50 LATE IN THE MORNING THEN WEST 20 LATE IN THE AFTERNOON. HIGH 11. UV INDEX 2 OR LOW. EAR FALLS - PERRAULT FALLS - WESTERN LAC SEUL. TODAY..SUNNY. HIGH 14. UV INDEX 5 OR MODERATE. TONIGHT..CLEAR. INCREASING CLOUDINESS AFTER MIDNIGHT. LOW PLUS 2 WITH RISK OF FROST. THURSDAY..A MIX OF SUN AND CLOUD WITH 60 PERCENT CHANCE OF SHOWERS. WIND BECOMING SOUTH 30 KM/H GUSTING TO 50 LATE IN THE MORNING. HIGH 11. UV INDEX 6 OR HIGH. SIOUX LOOKOUT - EASTERN LAC SEUL. TODAY..MAINLY SUNNY. HIGH 13. UV INDEX 5 OR MODERATE. TONIGHT..CLEAR. BECOMING PARTLY CLOUDY BEFORE MORNING. LOW PLUS 1 WITH PATCHY FROST. THURSDAY..A MIX OF SUN AND CLOUD WITH 60 PERCENT CHANCE OF SHOWERS. WIND BECOMING SOUTH 20 KM/H GUSTING TO 40 IN THE MORNING. HIGH 15. UV INDEX 6 OR HIGH. SAVANT LAKE - STURGEON LAKE. TODAY..MAINLY SUNNY. HIGH 10. UV INDEX 5 OR MODERATE. TONIGHT..CLEAR. WIND UP TO 15 KM/H. LOW MINUS 2 WITH FROST. WIND CHILL MINUS 6 OVERNIGHT. THURSDAY..SUNNY EARLY IN THE MORNING THEN A MIX OF SUN AND CLOUD WITH 30 PERCENT CHANCE OF SHOWERS. WIND BECOMING SOUTHWEST 20 KM/H IN THE MORNING. HIGH 15. UV INDEX 5 OR MODERATE. GULL BAY - BLACK STURGEON LAKE. TODAY..A MIX OF SUN AND CLOUD. HIGH 10. UV INDEX 5 OR MODERATE. TONIGHT..CLEARING THIS EVENING. LOW MINUS 1. THURSDAY..SUNNY. WIND SOUTH 20 KM/H BECOMING LIGHT EARLY IN THE AFTERNOON. HIGH 15. UV INDEX 6 OR HIGH. BEARDMORE - JELLICOE - MACDIARMID. TODAY..MAINLY SUNNY. HIGH 9. UV INDEX 5 OR MODERATE. TONIGHT..CLEAR. LOW MINUS 1. THURSDAY..SUNNY. WIND BECOMING SOUTH 20 KM/H IN THE MORNING. HIGH 15. UV INDEX 6 OR HIGH. ARMSTRONG - AUDEN - WABAKIMI PARK. TODAY..A MIX OF SUN AND CLOUD. HIGH 10. UV INDEX 5 OR MODERATE. TONIGHT..CLEARING THIS EVENING. WIND UP TO 15 KM/H. LOW MINUS 2. WIND CHILL MINUS 6 OVERNIGHT. THURSDAY..SUNNY. BECOMING A MIX OF SUN AND CLOUD IN THE AFTERNOON. WIND BECOMING SOUTHWEST 20 KM/H IN THE MORNING. HIGH 15. WIND CHILL MINUS 5 IN THE MORNING. UV INDEX 6 OR HIGH. GERALDTON - LONGLAC - CARAMAT. TODAY..CLOUDY. WIND NORTHWEST 20 KM/H. HIGH 9. UV INDEX 4 OR MODERATE. TONIGHT..CLEARING THIS EVENING. WIND UP TO 15 KM/H. LOW MINUS 2. WIND CHILL MINUS 6 OVERNIGHT. THURSDAY..SUNNY. WIND BECOMING SOUTHWEST 20 KM/H GUSTING TO 40 IN THE MORNING. HIGH 15. UV INDEX 6 OR HIGH. MANITOUWADGE - HORNEPAYNE. TODAY..OVERCAST. HIGH 6. UV INDEX 4 OR MODERATE. TONIGHT..CLOUDY. BECOMING PARTLY CLOUDY NEAR MIDNIGHT. WIND UP TO 15 KM/H. LOW MINUS 3. WIND CHILL MINUS 7 OVERNIGHT. THURSDAY..SUNNY. WIND BECOMING WEST 20 KM/H GUSTING TO 40 IN THE MORNING. HIGH 15. WIND CHILL MINUS 6 IN THE MORNING. UV INDEX 6 OR HIGH. NAKINA - AROLAND - PAGWA. TODAY..A MIX OF SUN AND CLOUD. WIND NORTHWEST 20 KM/H GUSTING TO 40. HIGH 9. UV INDEX 6 OR HIGH. TONIGHT..MAINLY CLOUDY. CLEARING AFTER MIDNIGHT. WIND NORTHWEST 20 KM/H BECOMING LIGHT THIS EVENING. LOW MINUS 2. WIND CHILL MINUS 6 OVERNIGHT. THURSDAY..SUNNY. WIND SOUTHWEST 20 KM/H GUSTING TO 40. HIGH 15. UV INDEX 6 OR HIGH. NIPIGON - ROSSPORT. TODAY..A MIX OF SUN AND CLOUD. HIGH 11. UV INDEX 6 OR HIGH. TONIGHT..CLEAR. FOG PATCHES DEVELOPING OVERNIGHT. LOW ZERO WITH FROST. THURSDAY..SUNNY. FOG PATCHES DISSIPATING IN THE MORNING. WIND BECOMING SOUTH 30 KM/H IN THE MORNING. HIGH 10. UV INDEX 6 OR HIGH. MARATHON - SCHREIBER. TODAY..CLOUDY. BECOMING A MIX OF SUN AND CLOUD THIS AFTERNOON. HIGH 9. UV INDEX 5 OR MODERATE. TONIGHT..CLEAR. FOG PATCHES DEVELOPING OVERNIGHT. LOW MINUS 1 WITH FROST. THURSDAY..SUNNY. FOG PATCHES DISSIPATING IN THE MORNING. WIND BECOMING SOUTHWEST 20 KM/H IN THE MORNING. HIGH 10. UV INDEX 6 OR HIGH. WAWA - PUKASKWA PARK. TODAY..CLOUDY. HIGH 6. UV INDEX 5 OR MODERATE. TONIGHT..CLEAR. FOG PATCHES DEVELOPING OVERNIGHT. LOW MINUS 1 WITH FROST. THURSDAY..SUNNY. FOG PATCHES DISSIPATING IN THE MORNING. HIGH 9. UV INDEX 6 OR HIGH. WHITE RIVER - DUBREUILVILLE. TODAY..CLOUDY. HIGH 8. UV INDEX 5 OR MODERATE. TONIGHT..CLEARING LATE THIS EVENING. FOG PATCHES DEVELOPING OVERNIGHT. WIND UP TO 15 KM/H. LOW MINUS 3 WITH FROST. WIND CHILL MINUS 5 OVERNIGHT. THURSDAY..SUNNY. FOG PATCHES DISSIPATING IN THE MORNING. WIND WEST 20 KM/H BECOMING LIGHT IN THE MORNING. HIGH 14. WIND CHILL MINUS 4 IN THE MORNING. UV INDEX 6 OR HIGH. SAULT STE. MARIE - ST. JOSEPH ISLAND. TODAY..A MIX OF SUN AND CLOUD. WIND NORTHWEST 40 KM/H GUSTING TO 60. HIGH 6. UV INDEX 7 OR HIGH. TONIGHT..CLEAR. FOG PATCHES DEVELOPING OVERNIGHT. WIND NORTHWEST 40 KM/H GUSTING TO 60 BECOMING LIGHT OVERNIGHT. LOW ZERO WITH FROST. THURSDAY..SUNNY. FOG PATCHES DISSIPATING IN THE MORNING. HIGH 12. UV INDEX 6 OR HIGH. SEARCHMONT - MONTREAL RIVER HARBOUR - BATCHAWANA BAY. TODAY..MAINLY CLOUDY. WIND NORTHWEST 40 KM/H DIMINISHING TO 20 EARLY THIS AFTERNOON THEN BECOMING LIGHT LATE THIS AFTERNOON. HIGH PLUS 5. UV INDEX 5 OR MODERATE. TONIGHT..CLEARING THIS EVENING. FOG PATCHES DEVELOPING OVERNIGHT. WIND UP TO 15 KM/H. LOW MINUS 1 WITH FROST. WIND CHILL MINUS 3 THIS EVENING. THURSDAY..SUNNY. FOG PATCHES DISSIPATING IN THE MORNING. HIGH 9. UV INDEX 6 OR HIGH. AGAWA - LAKE SUPERIOR PARK. TODAY..MAINLY CLOUDY. HIGH 8. UV INDEX 6 OR HIGH. TONIGHT..CLEAR. FOG PATCHES DEVELOPING OVERNIGHT. WIND UP TO 15 KM/H. LOW MINUS 3 WITH FROST. WIND CHILL MINUS 5 OVERNIGHT. THURSDAY..SUNNY. FOG PATCHES DISSIPATING IN THE MORNING. HIGH 9. UV INDEX 6 OR HIGH. KAPUSKASING - HEARST - SMOOTH ROCK FALLS. TODAY..CLOUDY. WIND NORTHWEST 20 KM/H GUSTING TO 40. HIGH 6. UV INDEX 4 OR MODERATE. TONIGHT..MAINLY CLOUDY. WIND UP TO 15 KM/H. LOW MINUS 2. WIND CHILL MINUS 6 OVERNIGHT. THURSDAY..A MIX OF SUN AND CLOUD. WIND BECOMING WEST 20 KM/H GUSTING TO 40 IN THE MORNING. HIGH 15. UV INDEX 6 OR HIGH. FRASERDALE - PLEDGER LAKE. TODAY..CLOUDY. WIND NORTHWEST 20 KM/H GUSTING TO 40. HIGH PLUS 4. UV INDEX 4 OR MODERATE. TONIGHT..CLOUDY. BECOMING PARTLY CLOUDY NEAR MIDNIGHT. WIND NORTHWEST 20 KM/H BECOMING LIGHT THIS EVENING. LOW MINUS 4. WIND CHILL MINUS 8 OVERNIGHT. THURSDAY..A MIX OF SUN AND CLOUD. WIND BECOMING SOUTHWEST 20 KM/H GUSTING TO 40 NEAR NOON. HIGH 15. WIND CHILL MINUS 7 IN THE MORNING. UV INDEX 6 OR HIGH. TIMMINS - COCHRANE - IROQUOIS FALLS. TODAY..CLOUDY. WIND NORTHWEST 20 KM/H. HIGH 6. UV INDEX 5 OR MODERATE. TONIGHT..CLOUDY. BECOMING PARTLY CLOUDY LATE THIS EVENING. WIND NORTHWEST 20 KM/H BECOMING LIGHT LATE THIS EVENING. LOW MINUS 3. WIND CHILL MINUS 7 OVERNIGHT. THURSDAY..MAINLY CLOUDY. WIND BECOMING WEST 20 KM/H GUSTING TO 40 IN THE MORNING. HIGH 14. WIND CHILL MINUS 6 IN THE MORNING. UV INDEX 5 OR MODERATE. LITTLE ABITIBI - KESAGAMI LAKE. TODAY..CLOUDY. WIND NORTHWEST 20 KM/H GUSTING TO 40. HIGH PLUS 3. UV INDEX 4 OR MODERATE. TONIGHT..MAINLY CLOUDY. WIND NORTHWEST 20 KM/H BECOMING LIGHT THIS EVENING. LOW MINUS 3. WIND CHILL MINUS 8 OVERNIGHT. THURSDAY..INCREASING CLOUDINESS EARLY IN THE MORNING. WIND BECOMING WEST 20 KM/H IN THE AFTERNOON. HIGH 12. WIND CHILL MINUS 6 IN THE MORNING. UV INDEX 6 OR HIGH. GREATER SUDBURY AND VICINITY. TODAY..MAINLY CLOUDY. WIND NORTHWEST 20 KM/H. HIGH 11. UV INDEX 7 OR HIGH. TONIGHT..A FEW CLOUDS. FOG PATCHES DEVELOPING OVERNIGHT. WIND NORTH 20 KM/H BECOMING LIGHT THIS EVENING. LOW MINUS 3 WITH FROST. WIND CHILL MINUS 5 OVERNIGHT. THURSDAY..SUNNY. FOG PATCHES DISSIPATING IN THE MORNING. HIGH 14. UV INDEX 6 OR HIGH. CHAPLEAU - MISSINAIBI LAKE. TODAY..MAINLY CLOUDY. HIGH 7. UV INDEX 6 OR HIGH. TONIGHT..CLEARING LATE THIS EVENING. FOG PATCHES DEVELOPING OVERNIGHT. WIND UP TO 15 KM/H. LOW MINUS 4 WITH FROST. WIND CHILL MINUS 8 OVERNIGHT. THURSDAY..SUNNY. BECOMING A MIX OF SUN AND CLOUD NEAR NOON. FOG PATCHES DISSIPATING IN THE MORNING. HIGH 14. UV INDEX 6 OR HIGH. GOGAMA - FOLEYET. TODAY..MAINLY CLOUDY. HIGH 7. UV INDEX 7 OR HIGH. TONIGHT..MAINLY CLOUDY. CLEARING NEAR MIDNIGHT. FOG PATCHES DEVELOPING OVERNIGHT. WIND UP TO 15 KM/H. LOW MINUS 4 WITH FROST. WIND CHILL MINUS 8 OVERNIGHT. THURSDAY..A MIX OF SUN AND CLOUD. FOG PATCHES DISSIPATING IN THE MORNING. WIND BECOMING WEST 20 KM/H NEAR NOON. HIGH 14. WIND CHILL MINUS 7 IN THE MORNING. UV INDEX 6 OR HIGH. KIRKLAND LAKE - ENGLEHART. TODAY..OVERCAST. WIND NORTHWEST 20 KM/H. HIGH 7. UV INDEX 3 OR MODERATE. TONIGHT..CLOUDY. CLEARING AFTER MIDNIGHT. WIND NORTHWEST 20 KM/H BECOMING LIGHT AFTER MIDNIGHT. LOW MINUS 4 WITH FROST. WIND CHILL MINUS 6 OVERNIGHT. THURSDAY..MAINLY CLOUDY. WIND BECOMING WEST 20 KM/H GUSTING TO 40 NEAR NOON THEN LIGHT IN THE AFTERNOON. HIGH 13. UV INDEX 6 OR HIGH. TEMISKAMING SHORES - TEMAGAMI. TODAY..MAINLY CLOUDY. WIND NORTHWEST 20 KM/H. HIGH 9. UV INDEX 7 OR HIGH. TONIGHT..MAINLY CLOUDY. WIND UP TO 15 KM/H. LOW MINUS 3 WITH FROST. WIND CHILL MINUS 5 OVERNIGHT. THURSDAY..SUNNY. BECOMING A MIX OF SUN AND CLOUD IN THE MORNING. WIND BECOMING WEST 20 KM/H IN THE AFTERNOON. HIGH 13. UV INDEX 6 OR HIGH. ELLIOT LAKE - RANGER LAKE. TODAY..A MIX OF SUN AND CLOUD. WIND NORTHWEST 20 KM/H BECOMING LIGHT LATE THIS AFTERNOON. HIGH 10. UV INDEX 8 OR VERY HIGH. TONIGHT..CLEAR. FOG PATCHES DEVELOPING OVERNIGHT. WIND BECOMING NORTHEAST 20 KM/H LATE THIS EVENING. LOW MINUS 3 WITH FROST. WIND CHILL MINUS 5 OVERNIGHT. THURSDAY..SUNNY. FOG PATCHES DISSIPATING IN THE MORNING. HIGH 14. UV INDEX 7 OR HIGH. MANITOULIN ISLAND. TODAY..CLEARING EARLY THIS AFTERNOON. WIND WEST 30 KM/H GUSTING TO 50. HIGH 8. UV INDEX 8 OR VERY HIGH. TONIGHT..CLEAR. WIND WEST 30 KM/H GUSTING TO 50 BECOMING NORTHEAST 20 LATE THIS EVENING THEN LIGHT OVERNIGHT. LOW PLUS 2 WITH RISK OF FROST. THURSDAY..SUNNY. WIND NORTHEAST 20 KM/H BECOMING LIGHT LATE IN THE MORNING. HIGH 10. UV INDEX 7 OR HIGH. BLIND RIVER - THESSALON. TODAY..A MIX OF SUN AND CLOUD. WIND NORTHWEST 20 KM/H. HIGH 9. UV INDEX 8 OR VERY HIGH. TONIGHT..CLEAR. WIND NORTHWEST 20 KM/H BECOMING LIGHT THIS EVENING. LOW PLUS 1 WITH PATCHY FROST. THURSDAY..SUNNY. HIGH 10. UV INDEX 7 OR HIGH. ESPANOLA - KILLARNEY. TODAY..MAINLY CLOUDY. WIND NORTHWEST 20 KM/H BECOMING LIGHT THIS AFTERNOON. HIGH 10. UV INDEX 7 OR HIGH. TONIGHT..CLEARING. WIND NORTHEAST 20 KM/H BECOMING LIGHT AFTER MIDNIGHT. LOW PLUS 1 WITH PATCHY FROST. THURSDAY..SUNNY. HIGH 10. UV INDEX 7 OR HIGH. NORTH BAY - POWASSAN - MATTAWA. TODAY..MAINLY CLOUDY. WIND WEST 20 KM/H. HIGH 12. UV INDEX 7 OR HIGH. TONIGHT..PARTLY CLOUDY. WIND NORTH 20 KM/H BECOMING LIGHT LATE THIS EVENING. LOW ZERO WITH FROST. THURSDAY..CLEARING IN THE MORNING. WIND NORTHEAST 20 KM/H BECOMING LIGHT EARLY IN THE AFTERNOON. HIGH 12. UV INDEX 7 OR HIGH. WEST NIPISSING - FRENCH RIVER. TODAY..MAINLY CLOUDY. WIND NORTHWEST 20 KM/H BECOMING LIGHT THIS AFTERNOON. HIGH 12. UV INDEX 7 OR HIGH. TONIGHT..PARTLY CLOUDY. WIND NORTH 20 KM/H BECOMING LIGHT AFTER MIDNIGHT. LOW MINUS 1 WITH FROST. THURSDAY..SUNNY. WIND NORTHEAST 20 KM/H BECOMING LIGHT LATE IN THE MORNING. HIGH 14. UV INDEX 7 OR HIGH. END