849
FPCN11 CWTO 312117 AAE
UPDATED FORECASTS FOR SOUTHERN ONTARIO AND THE NATIONAL CAPITAL
REGION ISSUED BY ENVIRONMENT CANADA AT 5:17 P.M. EDT FRIDAY 31 JULY
2026 FOR TONIGHT SATURDAY AND SATURDAY NIGHT.
THE NEXT SCHEDULED FORECAST WILL BE ISSUED AT 5:00 A.M. EDT SATURDAY.
STRATHROY - KOMOKA - WESTERN MIDDLESEX COUNTY.
TONIGHT..MAINLY CLOUDY. 70 PERCENT CHANCE OF SHOWERS EARLY THIS
EVENING. 30 PERCENT CHANCE OF SHOWERS OVERNIGHT. RISK OF A
THUNDERSTORM EARLY THIS EVENING. LOW 19.
SATURDAY..MAINLY CLOUDY WITH 40 PERCENT CHANCE OF SHOWERS. HIGH 27.
HUMIDEX 31. UV INDEX 6 OR HIGH.
SATURDAY NIGHT..SHOWERS. RISK OF A THUNDERSTORM LATE IN THE EVENING
AND OVERNIGHT. WIND BECOMING NORTHEAST 20 KM/H BEFORE MORNING.
LOW 18.
LONDON - PARKHILL - EASTERN MIDDLESEX COUNTY.
TONIGHT..MAINLY CLOUDY. 70 PERCENT CHANCE OF SHOWERS EARLY THIS
EVENING. 30 PERCENT CHANCE OF SHOWERS OVERNIGHT. RISK OF A
THUNDERSTORM EARLY THIS EVENING. LOW 19.
SATURDAY..MAINLY CLOUDY WITH 40 PERCENT CHANCE OF SHOWERS. HIGH 27.
HUMIDEX 31. UV INDEX 6 OR HIGH.
SATURDAY NIGHT..SHOWERS. RISK OF A THUNDERSTORM LATE IN THE EVENING
AND OVERNIGHT. LOW 18.
WOODSTOCK - TILLSONBURG - OXFORD COUNTY.
TONIGHT..PARTLY CLOUDY WITH 30 PERCENT CHANCE OF SHOWERS. RISK OF A
THUNDERSTORM EARLY THIS EVENING. LOW 18.
SATURDAY..MAINLY CLOUDY WITH 40 PERCENT CHANCE OF SHOWERS. WIND
BECOMING SOUTHWEST 20 KM/H IN THE AFTERNOON. HIGH 28. HUMIDEX 33. UV
INDEX 7 OR HIGH.
SATURDAY NIGHT..SHOWERS. RISK OF A THUNDERSTORM LATE IN THE EVENING
AND OVERNIGHT. LOW 17.
CALEDON.
TONIGHT..MAINLY CLOUDY. 30 PERCENT CHANCE OF SHOWERS THIS EVENING
WITH RISK OF THUNDERSTORMS. LOW 19.
SATURDAY..A MIX OF SUN AND CLOUD WITH 30 PERCENT CHANCE OF SHOWERS.
HIGH 27. HUMIDEX 32. UV INDEX 9 OR VERY HIGH.
SATURDAY NIGHT..MAINLY CLOUDY. 30 PERCENT CHANCE OF SHOWERS IN THE
EVENING. SHOWERS BEGINNING LATE IN THE EVENING. LOW 18.
NEWMARKET - GEORGINA - NORTHERN YORK REGION.
TONIGHT..MAINLY CLOUDY. 30 PERCENT CHANCE OF SHOWERS EARLY THIS
EVENING WITH RISK OF A THUNDERSTORM. LOW 18.
SATURDAY..A MIX OF SUN AND CLOUD WITH 30 PERCENT CHANCE OF SHOWERS.
RISK OF A THUNDERSTORM LATE IN THE AFTERNOON. HIGH 28. HUMIDEX 33.
UV INDEX 9 OR VERY HIGH.
SATURDAY NIGHT..MAINLY CLOUDY WITH 30 PERCENT CHANCE OF SHOWERS EARLY
IN THE EVENING. SHOWERS BEGINNING IN THE EVENING. RISK OF A
THUNDERSTORM IN THE EVENING AND OVERNIGHT. LOW 18.
STRATFORD - MITCHELL - SOUTHERN PERTH COUNTY.
TONIGHT..MAINLY CLOUDY. 70 PERCENT CHANCE OF SHOWERS EARLY THIS
EVENING WITH RISK OF A THUNDERSTORM. LOW 19.
SATURDAY..MAINLY CLOUDY WITH 40 PERCENT CHANCE OF SHOWERS. RISK OF A
THUNDERSTORM LATE IN THE AFTERNOON. HIGH 27. HUMIDEX 33. UV INDEX 8
OR VERY HIGH.
SATURDAY NIGHT..SHOWERS WITH RISK OF A THUNDERSTORM. LOW 17.
LISTOWEL - MILVERTON - NORTHERN PERTH COUNTY.
TONIGHT..MAINLY CLOUDY. 30 PERCENT CHANCE OF SHOWERS EARLY THIS
EVENING WITH RISK OF A THUNDERSTORM. LOW 19.
SATURDAY..MAINLY CLOUDY WITH 40 PERCENT CHANCE OF SHOWERS. RISK OF A
THUNDERSTORM LATE IN THE AFTERNOON. HIGH 27. HUMIDEX 33. UV INDEX 8
OR VERY HIGH.
SATURDAY NIGHT..SHOWERS WITH RISK OF A THUNDERSTORM. LOW 17.
KITCHENER - CAMBRIDGE - REGION OF WATERLOO.
TONIGHT..PARTLY CLOUDY. 30 PERCENT CHANCE OF SHOWERS EARLY THIS
EVENING WITH RISK OF A THUNDERSTORM. LOW 17.
SATURDAY..A MIX OF SUN AND CLOUD WITH 40 PERCENT CHANCE OF SHOWERS.
RISK OF A THUNDERSTORM LATE IN THE AFTERNOON. WIND BECOMING SOUTH
30 KM/H IN THE AFTERNOON. HIGH 27. HUMIDEX 33. UV INDEX 9 OR VERY
HIGH.
SATURDAY NIGHT..SHOWERS WITH RISK OF A THUNDERSTORM. LOW 17.
GUELPH - ERIN - SOUTHERN WELLINGTON COUNTY.
TONIGHT..PARTLY CLOUDY. 30 PERCENT CHANCE OF SHOWERS THIS EVENING
WITH RISK OF A THUNDERSTORM. LOW 17.
SATURDAY..A MIX OF SUN AND CLOUD WITH 30 PERCENT CHANCE OF SHOWERS.
HIGH 27. HUMIDEX 33. UV INDEX 9 OR VERY HIGH.
SATURDAY NIGHT..MAINLY CLOUDY. 30 PERCENT CHANCE OF SHOWERS IN THE
EVENING. SHOWERS BEGINNING LATE IN THE EVENING. LOW 17.
MOUNT FOREST - ARTHUR - NORTHERN WELLINGTON COUNTY.
TONIGHT..MAINLY CLOUDY. 60 PERCENT CHANCE OF SHOWERS EARLY THIS
EVENING WITH RISK OF A THUNDERSTORM. LOW 17.
SATURDAY..MAINLY CLOUDY WITH 40 PERCENT CHANCE OF SHOWERS. RISK OF A
THUNDERSTORM LATE IN THE AFTERNOON. WIND BECOMING NORTHEAST 20 KM/H
LATE IN THE AFTERNOON. HIGH 26. HUMIDEX 32. UV INDEX 8 OR VERY HIGH.
SATURDAY NIGHT..SHOWERS WITH RISK OF A THUNDERSTORM. WIND NORTHEAST
20 KM/H BECOMING LIGHT IN THE EVENING. LOW 17.
ORANGEVILLE - GRAND VALLEY - SOUTHERN DUFFERIN COUNTY.
TONIGHT..MAINLY CLOUDY. 30 PERCENT CHANCE OF SHOWERS EARLY THIS
EVENING WITH RISK OF A THUNDERSTORM. LOW 17.
SATURDAY..A MIX OF SUN AND CLOUD WITH 40 PERCENT CHANCE OF SHOWERS.
RISK OF A THUNDERSTORM IN THE AFTERNOON. HIGH 26. HUMIDEX 34. UV
INDEX 9 OR VERY HIGH.
SATURDAY NIGHT..CLOUDY. 40 PERCENT CHANCE OF SHOWERS IN THE EVENING.
SHOWERS BEGINNING NEAR MIDNIGHT. RISK OF A THUNDERSTORM IN THE
EVENING AND OVERNIGHT. LOW 17.
SHELBURNE - MANSFIELD - NORTHERN DUFFERIN COUNTY.
TONIGHT..MAINLY CLOUDY. 30 PERCENT CHANCE OF SHOWERS EARLY THIS
EVENING WITH RISK OF A THUNDERSTORM. LOW 17.
SATURDAY..A MIX OF SUN AND CLOUD WITH 40 PERCENT CHANCE OF SHOWERS.
RISK OF A THUNDERSTORM IN THE AFTERNOON. HIGH 26. HUMIDEX 34. UV
INDEX 9 OR VERY HIGH.
SATURDAY NIGHT..MAINLY CLOUDY. 40 PERCENT CHANCE OF SHOWERS IN THE
EVENING. SHOWERS BEGINNING NEAR MIDNIGHT. RISK OF A THUNDERSTORM IN
THE EVENING AND OVERNIGHT. LOW 17.
INNISFIL - NEW TECUMSETH - ANGUS.
TONIGHT..MAINLY CLOUDY. 30 PERCENT CHANCE OF SHOWERS EARLY THIS
EVENING WITH RISK OF A THUNDERSTORM. LOW 18.
SATURDAY..MAINLY CLOUDY WITH 40 PERCENT CHANCE OF SHOWERS. RISK OF A
THUNDERSTORM IN THE AFTERNOON. HIGH 26. HUMIDEX 34. UV INDEX 9 OR
VERY HIGH.
SATURDAY NIGHT..CLOUDY. 40 PERCENT CHANCE OF SHOWERS IN THE EVENING.
SHOWERS BEGINNING NEAR MIDNIGHT. RISK OF A THUNDERSTORM IN THE
EVENING AND OVERNIGHT. LOW 17.
HANOVER - DUNDALK - SOUTHERN GREY COUNTY.
TONIGHT..MAINLY CLOUDY. 60 PERCENT CHANCE OF SHOWERS EARLY THIS
EVENING. 40 PERCENT CHANCE OF SHOWERS OVERNIGHT. RISK OF A
THUNDERSTORM EARLY THIS EVENING. LOW 18.
SATURDAY..CLOUDY WITH 40 PERCENT CHANCE OF SHOWERS AND RISK OF A
THUNDERSTORM. HIGH 25. HUMIDEX 32. UV INDEX 8 OR VERY HIGH.
SATURDAY NIGHT..SHOWERS WITH RISK OF A THUNDERSTORM. LOW 17.
OWEN SOUND - BLUE MOUNTAINS - NORTHERN GREY COUNTY.
TONIGHT..MAINLY CLOUDY. 30 PERCENT CHANCE OF SHOWERS EARLY THIS
EVENING. 40 PERCENT CHANCE OF SHOWERS OVERNIGHT. RISK OF A
THUNDERSTORM EARLY THIS EVENING. LOW 18.
SATURDAY..MAINLY CLOUDY WITH 40 PERCENT CHANCE OF SHOWERS AND RISK OF
A THUNDERSTORM. HIGH 24. HUMIDEX 31. UV INDEX 7 OR HIGH.
SATURDAY NIGHT..SHOWERS WITH RISK OF A THUNDERSTORM. LOW 17.
BARRIE - COLLINGWOOD - HILLSDALE.
TONIGHT..MAINLY CLOUDY. 30 PERCENT CHANCE OF SHOWERS EARLY THIS
EVENING AND OVERNIGHT. RISK OF A THUNDERSTORM EARLY THIS EVENING.
LOW 18.
SATURDAY..MAINLY CLOUDY WITH 40 PERCENT CHANCE OF SHOWERS AND RISK OF
A THUNDERSTORM. WIND BECOMING SOUTHWEST 20 KM/H IN THE AFTERNOON.
HIGH 25. HUMIDEX 33. UV INDEX 9 OR VERY HIGH.
SATURDAY NIGHT..MAINLY CLOUDY. 40 PERCENT CHANCE OF SHOWERS EARLY IN
THE EVENING. SHOWERS BEGINNING IN THE EVENING. RISK OF A
THUNDERSTORM IN THE EVENING AND OVERNIGHT. LOW 17.
REMAINDER UNCHANGED.
END
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