FPCN11 CWTO 032112 AAA UPDATED FORECASTS FOR SOUTHERN ONTARIO AND THE NATIONAL CAPITAL REGION ISSUED BY ENVIRONMENT CANADA AT 5:11 P.M. EDT THURSDAY 3 JULY 2025 FOR TONIGHT FRIDAY AND FRIDAY NIGHT. THE NEXT SCHEDULED FORECAST WILL BE ISSUED AT 5:00 A.M. EDT FRIDAY. RODNEY - SHEDDEN - WESTERN ELGIN COUNTY. TONIGHT..A FEW CLOUDS. WIND NORTH 20 KM/H BECOMING LIGHT THIS EVENING. LOW 15. FRIDAY..CLEARING IN THE MORNING. HIGH 27. HUMIDEX 29. UV INDEX 10 OR VERY HIGH. FRIDAY NIGHT..CLEAR IN THE EVENING THEN PARTLY CLOUDY WITH 40 PERCENT CHANCE OF SHOWERS OVERNIGHT. RISK OF A THUNDERSTORM OVERNIGHT. LOW 20. ST. THOMAS - AYLMER - EASTERN ELGIN COUNTY. TONIGHT..A FEW CLOUDS. WIND NORTH 20 KM/H BECOMING LIGHT THIS EVENING. LOW 15. FRIDAY..SUNNY. HIGH 27. HUMIDEX 29. UV INDEX 10 OR VERY HIGH. FRIDAY NIGHT..CLEAR IN THE EVENING THEN PARTLY CLOUDY WITH 40 PERCENT CHANCE OF SHOWERS OVERNIGHT. RISK OF A THUNDERSTORM OVERNIGHT. LOW 20. STRATHROY - KOMOKA - WESTERN MIDDLESEX COUNTY. TONIGHT..A FEW CLOUDS. WIND NORTH 20 KM/H BECOMING LIGHT THIS EVENING. LOW 12. FRIDAY..SUNNY. HIGH 29. HUMIDEX 33. UV INDEX 9 OR VERY HIGH. FRIDAY NIGHT..CLEAR IN THE EVENING THEN PARTLY CLOUDY WITH 40 PERCENT CHANCE OF SHOWERS OVERNIGHT. RISK OF A THUNDERSTORM OVERNIGHT. LOW 19. LONDON - PARKHILL - EASTERN MIDDLESEX COUNTY. TONIGHT..CLEAR. WIND NORTH 20 KM/H BECOMING LIGHT THIS EVENING. LOW 12. FRIDAY..SUNNY. HIGH 29. HUMIDEX 33. UV INDEX 9 OR VERY HIGH. FRIDAY NIGHT..CLEAR IN THE EVENING THEN PARTLY CLOUDY WITH 40 PERCENT CHANCE OF SHOWERS OVERNIGHT. RISK OF A THUNDERSTORM OVERNIGHT. LOW 19. SIMCOE - DELHI - NORFOLK. TONIGHT..PARTLY CLOUDY. BECOMING CLEAR THIS EVENING. WIND NORTH 20 KM/H GUSTING TO 40 BECOMING LIGHT THIS EVENING. LOW 10. FRIDAY..SUNNY. HIGH 27. HUMIDEX 31. UV INDEX 9 OR VERY HIGH. FRIDAY NIGHT..CLEAR IN THE EVENING AND AFTER MIDNIGHT THEN PARTLY CLOUDY WITH 40 PERCENT CHANCE OF SHOWERS BEFORE MORNING. RISK OF A THUNDERSTORM BEFORE MORNING. LOW 17. DUNNVILLE - CALEDONIA - HALDIMAND. TONIGHT..PARTLY CLOUDY. BECOMING CLEAR THIS EVENING. WIND NORTH 20 KM/H GUSTING TO 40 BECOMING LIGHT THIS EVENING. LOW 10. FRIDAY..SUNNY. HIGH 27. HUMIDEX 30. UV INDEX 9 OR VERY HIGH. FRIDAY NIGHT..CLEAR. PARTLY CLOUDY BEFORE MORNING WITH 40 PERCENT CHANCE OF SHOWERS. RISK OF A THUNDERSTORM BEFORE MORNING. LOW 16. WOODSTOCK - TILLSONBURG - OXFORD COUNTY. TONIGHT..CLEAR. WIND NORTH 20 KM/H BECOMING LIGHT THIS EVENING. LOW 10. FRIDAY..SUNNY. HIGH 28. HUMIDEX 32. UV INDEX 9 OR VERY HIGH. FRIDAY NIGHT..CLEAR IN THE EVENING AND AFTER MIDNIGHT THEN PARTLY CLOUDY WITH 40 PERCENT CHANCE OF SHOWERS BEFORE MORNING. RISK OF A THUNDERSTORM BEFORE MORNING. LOW 16. BRANTFORD - COUNTY OF BRANT. TONIGHT..CLEAR. WIND NORTH 20 KM/H BECOMING LIGHT THIS EVENING. LOW 10. FRIDAY..SUNNY. HIGH 28. HUMIDEX 32. UV INDEX 9 OR VERY HIGH. FRIDAY NIGHT..CLEAR. PARTLY CLOUDY BEFORE MORNING WITH 40 PERCENT CHANCE OF SHOWERS. RISK OF A THUNDERSTORM BEFORE MORNING. LOW 16. NIAGARA FALLS - WELLAND - SOUTHERN NIAGARA REGION. TONIGHT..PARTLY CLOUDY. BECOMING CLEAR THIS EVENING. WIND NORTH 20 KM/H GUSTING TO 40 BECOMING LIGHT THIS EVENING. LOW 16. FRIDAY..SUNNY. HIGH 26. HUMIDEX 32. UV INDEX 9 OR VERY HIGH. FRIDAY NIGHT..CLEAR. PARTLY CLOUDY BEFORE MORNING WITH 40 PERCENT CHANCE OF SHOWERS. RISK OF A THUNDERSTORM BEFORE MORNING. LOW 18. ST. CATHARINES - GRIMSBY - NORTHERN NIAGARA REGION. TONIGHT..PARTLY CLOUDY. BECOMING CLEAR THIS EVENING. WIND NORTH 20 KM/H GUSTING TO 40 BECOMING LIGHT THIS EVENING. LOW 14. FRIDAY..SUNNY. HIGH 27. HUMIDEX 31. UV INDEX 9 OR VERY HIGH. FRIDAY NIGHT..CLEAR. PARTLY CLOUDY BEFORE MORNING WITH 40 PERCENT CHANCE OF SHOWERS. RISK OF A THUNDERSTORM BEFORE MORNING. LOW 16. CITY OF HAMILTON. TONIGHT..CLEAR. WIND NORTH 20 KM/H BECOMING LIGHT THIS EVENING. LOW 11. FRIDAY..SUNNY. HIGH 27. HUMIDEX 30. UV INDEX 9 OR VERY HIGH. FRIDAY NIGHT..CLEAR. PARTLY CLOUDY BEFORE MORNING WITH 40 PERCENT CHANCE OF SHOWERS. RISK OF A THUNDERSTORM BEFORE MORNING. LOW 16. BURLINGTON - OAKVILLE. TONIGHT..CLEAR. WIND NORTH 20 KM/H BECOMING LIGHT THIS EVENING. LOW 12. FRIDAY..SUNNY. HIGH 27. HUMIDEX 30. UV INDEX 9 OR VERY HIGH. FRIDAY NIGHT..CLEAR. PARTLY CLOUDY BEFORE MORNING WITH 40 PERCENT CHANCE OF SHOWERS. RISK OF A THUNDERSTORM BEFORE MORNING. LOW 16. HALTON HILLS - MILTON. TONIGHT..CLEAR. WIND NORTH 20 KM/H BECOMING LIGHT THIS EVENING. LOW 12. FRIDAY..SUNNY. HIGH 27. HUMIDEX 30. UV INDEX 9 OR VERY HIGH. FRIDAY NIGHT..CLEAR. PARTLY CLOUDY BEFORE MORNING WITH 40 PERCENT CHANCE OF SHOWERS. RISK OF A THUNDERSTORM BEFORE MORNING. LOW 16. REMAINDER UNCHANGED. END