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FPCN11 CWTO 210209 AAA
UPDATED FORECASTS FOR SOUTHERN ONTARIO AND THE NATIONAL CAPITAL
REGION ISSUED BY ENVIRONMENT CANADA AT 10:08 P.M. EDT SUNDAY 20
SEPTEMBER 2026 FOR TONIGHT MONDAY AND MONDAY NIGHT.
THE NEXT SCHEDULED FORECAST WILL BE ISSUED AT 5:00 A.M. EDT MONDAY.
WINDSOR - LEAMINGTON - ESSEX COUNTY.
TONIGHT..PARTLY CLOUDY. WIND NORTHEAST 20 KM/H GUSTING TO 40. LOW 13.
MONDAY..MAINLY CLOUDY. 30 PERCENT CHANCE OF SHOWERS LATE IN THE
MORNING AND IN THE AFTERNOON. WIND NORTHEAST 20 KM/H GUSTING TO 40.
HIGH 18. UV INDEX 6 OR HIGH.
MONDAY NIGHT..PARTLY CLOUDY WITH 30 PERCENT CHANCE OF SHOWERS. WIND
NORTHEAST 20 KM/H GUSTING TO 40. LOW 8.
CHATHAM-KENT - RONDEAU PARK.
TONIGHT..PARTLY CLOUDY. WIND NORTHEAST 20 KM/H GUSTING TO 40. LOW 11.
MONDAY..MAINLY CLOUDY. 30 PERCENT CHANCE OF SHOWERS LATE IN THE
MORNING AND IN THE AFTERNOON. WIND NORTHEAST 20 KM/H GUSTING TO 40.
HIGH 17. UV INDEX 6 OR HIGH.
MONDAY NIGHT..PARTLY CLOUDY WITH 30 PERCENT CHANCE OF SHOWERS. WIND
NORTHEAST 20 KM/H GUSTING TO 40. LOW 8.
SARNIA - PETROLIA - WESTERN LAMBTON COUNTY.
TONIGHT..PARTLY CLOUDY. WIND NORTHEAST 20 KM/H. LOW 9.
MONDAY..MAINLY CLOUDY. 30 PERCENT CHANCE OF SHOWERS IN THE AFTERNOON.
WIND NORTHEAST 20 KM/H GUSTING TO 40. HIGH 17. UV INDEX 6 OR HIGH.
MONDAY NIGHT..PARTLY CLOUDY WITH 30 PERCENT CHANCE OF SHOWERS IN THE
EVENING. CLEARING OVERNIGHT. WIND NORTHEAST 20 KM/H GUSTING TO 40.
LOW 7.
WATFORD - PINERY PARK - EASTERN LAMBTON COUNTY.
TONIGHT..PARTLY CLOUDY. WIND NORTHEAST 20 KM/H. LOW 9.
MONDAY..MAINLY CLOUDY. 30 PERCENT CHANCE OF SHOWERS IN THE AFTERNOON.
WIND NORTHEAST 20 KM/H GUSTING TO 40. HIGH 17. UV INDEX 6 OR HIGH.
MONDAY NIGHT..PARTLY CLOUDY. 30 PERCENT CHANCE OF SHOWERS IN THE
EVENING. WIND NORTHEAST 20 KM/H GUSTING TO 40. LOW 7.
RODNEY - SHEDDEN - WESTERN ELGIN COUNTY.
TONIGHT..PARTLY CLOUDY. WIND NORTHEAST 20 KM/H. LOW 10.
MONDAY..MAINLY CLOUDY. 30 PERCENT CHANCE OF SHOWERS IN THE AFTERNOON.
WIND NORTHEAST 20 KM/H GUSTING TO 40. HIGH 17. UV INDEX 6 OR HIGH.
MONDAY NIGHT..PARTLY CLOUDY. 30 PERCENT CHANCE OF SHOWERS IN THE
EVENING. WIND NORTHEAST 20 KM/H GUSTING TO 40. LOW 8.
ST. THOMAS - AYLMER - EASTERN ELGIN COUNTY.
TONIGHT..CLEAR. WIND NORTHEAST 20 KM/H. LOW 9.
MONDAY..MAINLY CLOUDY. WIND NORTHEAST 20 KM/H GUSTING TO 40. HIGH 17.
UV INDEX 6 OR HIGH.
MONDAY NIGHT..CLEARING IN THE EVENING. WIND NORTHEAST 20 KM/H GUSTING
TO 40. LOW 8.
STRATHROY - KOMOKA - WESTERN MIDDLESEX COUNTY.
TONIGHT..PARTLY CLOUDY. WIND NORTHEAST 20 KM/H. LOW 9.
MONDAY..MAINLY CLOUDY. 30 PERCENT CHANCE OF SHOWERS IN THE AFTERNOON.
WIND NORTHEAST 20 KM/H GUSTING TO 40. HIGH 17. UV INDEX 6 OR HIGH.
MONDAY NIGHT..PARTLY CLOUDY. 30 PERCENT CHANCE OF SHOWERS IN THE
EVENING. WIND NORTHEAST 20 KM/H GUSTING TO 40. LOW 7.
LONDON - PARKHILL - EASTERN MIDDLESEX COUNTY.
TONIGHT..A FEW CLOUDS. WIND NORTHEAST 20 KM/H. LOW 9.
MONDAY..MAINLY CLOUDY. WIND NORTHEAST 20 KM/H GUSTING TO 40. HIGH 17.
UV INDEX 6 OR HIGH.
MONDAY NIGHT..CLEARING IN THE EVENING. WIND NORTHEAST 20 KM/H GUSTING
TO 40. LOW 6.
GANANOQUE - MALLORYTOWN.
TONIGHT..MAINLY CLOUDY. WIND NORTHEAST 20 KM/H BECOMING LIGHT
OVERNIGHT. LOW PLUS 5.
MONDAY..MAINLY SUNNY. WIND BECOMING NORTHEAST 20 KM/H IN THE MORNING.
HIGH 14. UV INDEX 6 OR HIGH.
MONDAY NIGHT..CLEAR. WIND NORTHEAST 20 KM/H BECOMING LIGHT NEAR
MIDNIGHT. LOW PLUS 5.
BROCKVILLE - PRESCOTT.
TONIGHT..MAINLY CLOUDY. WIND NORTH 20 KM/H BECOMING LIGHT AFTER
MIDNIGHT. LOW PLUS 4 WITH RISK OF FROST.
MONDAY..MAINLY SUNNY. HIGH 14. UV INDEX 6 OR HIGH.
MONDAY NIGHT..A FEW CLOUDS. LOW PLUS 5.
WESTPORT - CHARLESTON LAKE.
TONIGHT..MAINLY CLOUDY. WIND NORTHEAST 20 KM/H BECOMING LIGHT
OVERNIGHT. LOW PLUS 4 WITH RISK OF FROST.
MONDAY..MAINLY SUNNY. WIND BECOMING NORTHEAST 20 KM/H IN THE MORNING.
HIGH 14. UV INDEX 6 OR HIGH.
MONDAY NIGHT..A FEW CLOUDS. WIND NORTHEAST 20 KM/H BECOMING LIGHT
NEAR MIDNIGHT. LOW PLUS 4 WITH RISK OF FROST.
MERRICKVILLE-WOLFORD - KEMPTVILLE.
TONIGHT..MAINLY CLOUDY. WIND NORTH 20 KM/H BECOMING LIGHT AFTER
MIDNIGHT. LOW PLUS 4 WITH RISK OF FROST.
MONDAY..MAINLY SUNNY. HIGH 14. UV INDEX 6 OR HIGH.
MONDAY NIGHT..PARTLY CLOUDY. LOW PLUS 4 WITH RISK OF FROST.
OTTAWA NORTH - KANATA - ORLEANS.
TONIGHT..PARTLY CLOUDY. WIND NORTH 20 KM/H BECOMING LIGHT AFTER
MIDNIGHT. LOW PLUS 3 WITH RISK OF FROST.
MONDAY..MAINLY SUNNY. HIGH 16. UV INDEX 6 OR HIGH.
MONDAY NIGHT..PARTLY CLOUDY. LOW PLUS 4 WITH RISK OF FROST.
OTTAWA SOUTH - RICHMOND - METCALFE.
TONIGHT..PARTLY CLOUDY. WIND NORTH 20 KM/H BECOMING LIGHT AFTER
MIDNIGHT. LOW PLUS 3 WITH RISK OF FROST.
MONDAY..MAINLY SUNNY. HIGH 16. UV INDEX 6 OR HIGH.
MONDAY NIGHT..PARTLY CLOUDY. LOW PLUS 4 WITH RISK OF FROST.
GATINEAU.
TONIGHT..PARTLY CLOUDY. WIND NORTH 20 KM/H BECOMING LIGHT AFTER
MIDNIGHT. LOW PLUS 3 WITH RISK OF FROST.
MONDAY..SUNNY. BECOMING A MIX OF SUN AND CLOUD IN THE MORNING.
HIGH 17. UV INDEX 6 OR HIGH.
MONDAY NIGHT..PARTLY CLOUDY. LOW PLUS 4 WITH RISK OF FROST.
PRESCOTT AND RUSSELL.
TONIGHT..MAINLY CLOUDY. CLEARING BEFORE MORNING. WIND NORTH 20 KM/H
BECOMING LIGHT AFTER MIDNIGHT. LOW PLUS 3 WITH RISK OF FROST.
MONDAY..MAINLY SUNNY. HIGH 16. UV INDEX 6 OR HIGH.
MONDAY NIGHT..PARTLY CLOUDY. LOW PLUS 4 WITH RISK OF FROST.
MORRISBURG - LONG SAULT.
TONIGHT..MAINLY CLOUDY. WIND NORTH 20 KM/H BECOMING LIGHT AFTER
MIDNIGHT. LOW PLUS 4 WITH RISK OF FROST.
MONDAY..MAINLY SUNNY. HIGH 16. UV INDEX 6 OR HIGH.
MONDAY NIGHT..A FEW CLOUDS. LOW PLUS 5.
CORNWALL - LANCASTER.
TONIGHT..MAINLY CLOUDY. WIND NORTH 20 KM/H BECOMING LIGHT AFTER
MIDNIGHT. LOW PLUS 4 WITH RISK OF FROST.
MONDAY..A MIX OF SUN AND CLOUD. HIGH 16. UV INDEX 6 OR HIGH.
MONDAY NIGHT..PARTLY CLOUDY. BECOMING CLEAR AFTER MIDNIGHT. LOW
PLUS 5.
WINCHESTER - NEWINGTON.
TONIGHT..PARTLY CLOUDY. WIND NORTH 20 KM/H BECOMING LIGHT AFTER
MIDNIGHT. LOW PLUS 4 WITH RISK OF FROST.
MONDAY..MAINLY SUNNY. HIGH 16. UV INDEX 6 OR HIGH.
MONDAY NIGHT..PARTLY CLOUDY. BECOMING CLEAR OVERNIGHT. LOW PLUS 5.
MAXVILLE - ALEXANDRIA.
TONIGHT..PARTLY CLOUDY. WIND NORTH 20 KM/H BECOMING LIGHT AFTER
MIDNIGHT. LOW PLUS 4 WITH RISK OF FROST.
MONDAY..SUNNY. BECOMING A MIX OF SUN AND CLOUD LATE IN THE MORNING.
HIGH 16. UV INDEX 6 OR HIGH.
MONDAY NIGHT..PARTLY CLOUDY. LOW PLUS 5.
SMITHS FALLS - PERTH - EASTERN LANARK COUNTY.
TONIGHT..MAINLY CLOUDY. WIND NORTH 20 KM/H BECOMING LIGHT AFTER
MIDNIGHT. LOW PLUS 3 WITH RISK OF FROST.
MONDAY..MAINLY SUNNY. HIGH 15. UV INDEX 6 OR HIGH.
MONDAY NIGHT..A FEW CLOUDS. LOW PLUS 4 WITH RISK OF FROST.
REMAINDER UNCHANGED.
END
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