381
FPCN11 CWTO 201251 AAA
UPDATED FORECASTS FOR SOUTHERN ONTARIO AND THE NATIONAL CAPITAL
REGION ISSUED BY ENVIRONMENT CANADA AT 8:50 A.M. EDT MONDAY 20 APRIL
2026 FOR TODAY AND TUESDAY.
THE NEXT SCHEDULED FORECAST WILL BE ISSUED AT 11:00 A.M. EDT.
CITY OF TORONTO.
TODAY..SUNNY. BECOMING A MIX OF SUN AND CLOUD NEAR NOON. WIND
NORTHWEST 20 KM/H GUSTING TO 40. HIGH PLUS 4. WIND CHILL MINUS 8
THIS MORNING. UV INDEX 4 OR MODERATE.
TONIGHT..CLEARING LATE THIS EVENING. WIND UP TO 15 KM/H. LOW MINUS 3.
WIND CHILL MINUS 7 OVERNIGHT.
TUESDAY..A MIX OF SUN AND CLOUD. WIND BECOMING SOUTH 20 KM/H GUSTING
TO 40 NEAR NOON. HIGH 9. WIND CHILL MINUS 7 IN THE MORNING. UV
INDEX 6 OR HIGH.
CHATHAM-KENT - RONDEAU PARK.
TODAY..MAINLY CLOUDY. 30 PERCENT CHANCE OF FLURRIES THIS MORNING.
CLEARING THIS AFTERNOON. WIND NORTHWEST 20 KM/H GUSTING TO 40. HIGH
PLUS 3. WIND CHILL MINUS 8 THIS MORNING. UV INDEX 4 OR MODERATE.
TONIGHT..CLEAR. BECOMING PARTLY CLOUDY BEFORE MORNING. WIND BECOMING
SOUTH 20 KM/H OVERNIGHT. LOW MINUS 1. WIND CHILL MINUS 3 THIS
EVENING.
TUESDAY..MAINLY CLOUDY. CLEARING EARLY IN THE AFTERNOON. WIND SOUTH
30 KM/H GUSTING TO 50. HIGH 17. UV INDEX 7 OR HIGH.
SARNIA - PETROLIA - WESTERN LAMBTON COUNTY.
TODAY..MAINLY CLOUDY. 30 PERCENT CHANCE OF FLURRIES THIS MORNING.
CLEARING THIS AFTERNOON. WIND NORTHWEST 20 KM/H GUSTING TO 40. HIGH
PLUS 3. WIND CHILL MINUS 8 THIS MORNING. UV INDEX 4 OR MODERATE.
TONIGHT..CLEAR. BECOMING PARTLY CLOUDY OVERNIGHT. WIND BECOMING SOUTH
20 KM/H OVERNIGHT. LOW MINUS 1. WIND CHILL MINUS 3 THIS EVENING.
TUESDAY..MAINLY CLOUDY. CLEARING EARLY IN THE AFTERNOON. WIND SOUTH
30 KM/H GUSTING TO 50. HIGH 17. UV INDEX 6 OR HIGH.
WATFORD - PINERY PARK - EASTERN LAMBTON COUNTY.
TODAY..MAINLY CLOUDY. 70 PERCENT CHANCE OF FLURRIES THIS MORNING.
CLEARING THIS AFTERNOON. WIND NORTHWEST 20 KM/H GUSTING TO 40. HIGH
PLUS 3. WIND CHILL MINUS 8 THIS MORNING. UV INDEX 4 OR MODERATE.
TONIGHT..CLEARING LATE THIS EVENING. WIND BECOMING SOUTH 20 KM/H
OVERNIGHT. LOW MINUS 1. WIND CHILL MINUS 3 THIS EVENING.
TUESDAY..MAINLY SUNNY. INCREASING CLOUDINESS NEAR NOON. WIND SOUTH
30 KM/H GUSTING TO 50. HIGH 17. UV INDEX 6 OR HIGH.
RODNEY - SHEDDEN - WESTERN ELGIN COUNTY.
TODAY..MAINLY CLOUDY. 30 PERCENT CHANCE OF FLURRIES THIS MORNING.
CLEARING THIS AFTERNOON. WIND NORTHWEST 20 KM/H GUSTING TO 40. HIGH
PLUS 3. WIND CHILL MINUS 8 THIS MORNING. UV INDEX 4 OR MODERATE.
TONIGHT..CLEAR. WIND UP TO 15 KM/H. LOW MINUS 3. WIND CHILL NEAR
MINUS 7.
TUESDAY..MAINLY CLOUDY. CLEARING EARLY IN THE AFTERNOON. WIND
BECOMING SOUTH 30 KM/H GUSTING TO 50 IN THE MORNING. HIGH 12. UV
INDEX 6 OR HIGH.
ST. THOMAS - AYLMER - EASTERN ELGIN COUNTY.
TODAY..MAINLY CLOUDY. 30 PERCENT CHANCE OF FLURRIES THIS MORNING.
CLEARING THIS AFTERNOON. WIND NORTHWEST 20 KM/H GUSTING TO 40. HIGH
PLUS 3. WIND CHILL MINUS 8 THIS MORNING. UV INDEX 4 OR MODERATE.
TONIGHT..CLEAR. WIND UP TO 15 KM/H. LOW MINUS 3. WIND CHILL NEAR
MINUS 7.
TUESDAY..A MIX OF SUN AND CLOUD. WIND BECOMING SOUTH 30 KM/H GUSTING
TO 50 IN THE MORNING. HIGH 12. UV INDEX 6 OR HIGH.
STRATHROY - KOMOKA - WESTERN MIDDLESEX COUNTY.
TODAY..MAINLY CLOUDY. 70 PERCENT CHANCE OF FLURRIES THIS MORNING.
CLEARING THIS AFTERNOON. WIND NORTHWEST 20 KM/H GUSTING TO 40. HIGH
PLUS 3. WIND CHILL MINUS 8 THIS MORNING. UV INDEX 4 OR MODERATE.
TONIGHT..CLEAR. BECOMING PARTLY CLOUDY OVERNIGHT. WIND UP TO 15 KM/H.
LOW MINUS 3. WIND CHILL NEAR MINUS 7.
TUESDAY..MAINLY CLOUDY. CLEARING IN THE AFTERNOON. WIND BECOMING
SOUTH 30 KM/H GUSTING TO 50 IN THE MORNING. HIGH 12. UV INDEX 6 OR
HIGH.
LONDON - PARKHILL - EASTERN MIDDLESEX COUNTY.
TODAY..MAINLY CLOUDY. 70 PERCENT CHANCE OF FLURRIES THIS MORNING.
CLEARING THIS AFTERNOON. WIND NORTHWEST 20 KM/H GUSTING TO 40. HIGH
PLUS 3. WIND CHILL MINUS 8 THIS MORNING. UV INDEX 4 OR MODERATE.
TONIGHT..CLEAR. BECOMING PARTLY CLOUDY BEFORE MORNING. WIND UP TO 15
KM/H. LOW MINUS 3. WIND CHILL NEAR MINUS 7.
TUESDAY..A MIX OF SUN AND CLOUD. WIND BECOMING SOUTH 30 KM/H GUSTING
TO 50 IN THE MORNING. HIGH 12. UV INDEX 6 OR HIGH.
BURLINGTON - OAKVILLE.
TODAY..SUNNY. BECOMING A MIX OF SUN AND CLOUD NEAR NOON. WIND
NORTHWEST 20 KM/H GUSTING TO 40. HIGH PLUS 5. WIND CHILL MINUS 8
THIS MORNING. UV INDEX 4 OR MODERATE.
TONIGHT..CLEARING LATE THIS EVENING. WIND UP TO 15 KM/H. LOW MINUS 3.
WIND CHILL MINUS 7 OVERNIGHT.
TUESDAY..A MIX OF SUN AND CLOUD. WIND BECOMING SOUTH 20 KM/H GUSTING
TO 40 NEAR NOON. HIGH 9. WIND CHILL MINUS 7 IN THE MORNING. UV
INDEX 6 OR HIGH.
HALTON HILLS - MILTON.
TODAY..SUNNY. BECOMING A MIX OF SUN AND CLOUD NEAR NOON. WIND
NORTHWEST 20 KM/H GUSTING TO 40. HIGH PLUS 5. WIND CHILL MINUS 8
THIS MORNING. UV INDEX 4 OR MODERATE.
TONIGHT..CLEARING THIS EVENING. WIND UP TO 15 KM/H. LOW MINUS 3. WIND
CHILL MINUS 7 OVERNIGHT.
TUESDAY..A MIX OF SUN AND CLOUD. WIND BECOMING SOUTH 20 KM/H GUSTING
TO 40 NEAR NOON. HIGH 9. WIND CHILL MINUS 7 IN THE MORNING. UV
INDEX 6 OR HIGH.
MISSISSAUGA - BRAMPTON.
TODAY..SUNNY. BECOMING A MIX OF SUN AND CLOUD NEAR NOON. WIND
NORTHWEST 20 KM/H GUSTING TO 40. HIGH PLUS 5. WIND CHILL MINUS 8
THIS MORNING. UV INDEX 4 OR MODERATE.
TONIGHT..CLEARING LATE THIS EVENING. WIND UP TO 15 KM/H. LOW MINUS 3.
WIND CHILL MINUS 7 OVERNIGHT.
TUESDAY..A MIX OF SUN AND CLOUD. WIND BECOMING SOUTH 20 KM/H GUSTING
TO 40 NEAR NOON. HIGH 9. WIND CHILL MINUS 7 IN THE MORNING. UV
INDEX 6 OR HIGH.
VAUGHAN - RICHMOND HILL - MARKHAM.
TODAY..SUNNY. BECOMING A MIX OF SUN AND CLOUD NEAR NOON. WIND
NORTHWEST 20 KM/H GUSTING TO 40. HIGH PLUS 4. WIND CHILL MINUS 8
THIS MORNING. UV INDEX 4 OR MODERATE.
TONIGHT..CLEARING LATE THIS EVENING. WIND UP TO 15 KM/H. LOW MINUS 3.
WIND CHILL MINUS 7 OVERNIGHT.
TUESDAY..A MIX OF SUN AND CLOUD. WIND BECOMING SOUTH 20 KM/H GUSTING
TO 40 NEAR NOON. HIGH 9. WIND CHILL MINUS 7 IN THE MORNING. UV
INDEX 6 OR HIGH.
PICKERING - OSHAWA - SOUTHERN DURHAM REGION.
TODAY..SUNNY. BECOMING A MIX OF SUN AND CLOUD NEAR NOON. WIND
NORTHWEST 20 KM/H GUSTING TO 40. HIGH PLUS 4. WIND CHILL MINUS 8
THIS MORNING. UV INDEX 4 OR MODERATE.
TONIGHT..A FEW CLOUDS. WIND UP TO 15 KM/H. LOW MINUS 3. WIND CHILL
MINUS 7 OVERNIGHT.
TUESDAY..A MIX OF SUN AND CLOUD. WIND BECOMING SOUTH 20 KM/H GUSTING
TO 40 NEAR NOON. HIGH 9. WIND CHILL MINUS 7 IN THE MORNING. UV
INDEX 6 OR HIGH.
GODERICH - BLUEWATER - SOUTHERN HURON COUNTY.
TODAY..MAINLY CLOUDY. 70 PERCENT CHANCE OF FLURRIES THIS MORNING.
CLEARING THIS AFTERNOON. WIND NORTHWEST 20 KM/H GUSTING TO 40. HIGH
PLUS 1. WIND CHILL MINUS 9 THIS MORNING. UV INDEX 4 OR MODERATE.
TONIGHT..CLEAR. INCREASING CLOUDINESS AFTER MIDNIGHT. WIND UP TO 15
KM/H. LOW MINUS 3. WIND CHILL MINUS 8 OVERNIGHT.
TUESDAY..A MIX OF SUN AND CLOUD. WIND SOUTH 30 KM/H GUSTING TO 50.
HIGH 11. WIND CHILL MINUS 8 IN THE MORNING. UV INDEX 6 OR HIGH.
WINGHAM - BLYTH - NORTHERN HURON COUNTY.
TODAY..MAINLY CLOUDY. 70 PERCENT CHANCE OF FLURRIES THIS MORNING.
CLEARING THIS AFTERNOON. WIND NORTHWEST 20 KM/H GUSTING TO 40. HIGH
PLUS 1. WIND CHILL MINUS 9 THIS MORNING. UV INDEX 4 OR MODERATE.
TONIGHT..CLEAR. BECOMING PARTLY CLOUDY OVERNIGHT. WIND UP TO 15 KM/H.
LOW MINUS 3. WIND CHILL MINUS 8 OVERNIGHT.
TUESDAY..A MIX OF SUN AND CLOUD. WIND SOUTH 30 KM/H GUSTING TO 50.
HIGH 11. WIND CHILL MINUS 8 IN THE MORNING. UV INDEX 5 OR MODERATE.
STRATFORD - MITCHELL - SOUTHERN PERTH COUNTY.
TODAY..MAINLY CLOUDY. 40 PERCENT CHANCE OF FLURRIES THIS MORNING.
CLEARING THIS AFTERNOON. WIND NORTHWEST 20 KM/H GUSTING TO 40. HIGH
PLUS 1. WIND CHILL MINUS 9 THIS MORNING. UV INDEX 4 OR MODERATE.
TONIGHT..CLEAR. BECOMING PARTLY CLOUDY OVERNIGHT. WIND UP TO 15 KM/H.
LOW MINUS 3. WIND CHILL MINUS 8 OVERNIGHT.
TUESDAY..A MIX OF SUN AND CLOUD. WIND SOUTH 30 KM/H GUSTING TO 50.
HIGH 11. WIND CHILL MINUS 8 IN THE MORNING. UV INDEX 5 OR MODERATE.
LISTOWEL - MILVERTON - NORTHERN PERTH COUNTY.
TODAY..MAINLY CLOUDY. 40 PERCENT CHANCE OF FLURRIES THIS MORNING.
CLEARING THIS AFTERNOON. WIND NORTHWEST 20 KM/H GUSTING TO 40. HIGH
PLUS 1. WIND CHILL MINUS 9 THIS MORNING. UV INDEX 4 OR MODERATE.
TONIGHT..CLEAR. BECOMING PARTLY CLOUDY OVERNIGHT. WIND UP TO 15 KM/H.
LOW MINUS 3. WIND CHILL MINUS 8 OVERNIGHT.
TUESDAY..A MIX OF SUN AND CLOUD. WIND SOUTH 30 KM/H GUSTING TO 50.
HIGH 11. WIND CHILL MINUS 8 IN THE MORNING. UV INDEX 6 OR HIGH.
KITCHENER - CAMBRIDGE - REGION OF WATERLOO.
TODAY..A MIX OF SUN AND CLOUD. 40 PERCENT CHANCE OF FLURRIES THIS
MORNING. WIND NORTHWEST 20 KM/H GUSTING TO 40. HIGH PLUS 3. WIND
CHILL MINUS 10 THIS MORNING. UV INDEX 4 OR MODERATE.
TONIGHT..CLEAR. WIND UP TO 15 KM/H. LOW MINUS 4. WIND CHILL MINUS 9
OVERNIGHT.
TUESDAY..A MIX OF SUN AND CLOUD. WIND BECOMING SOUTH 30 KM/H GUSTING
TO 50 IN THE MORNING. HIGH 9. WIND CHILL MINUS 9 IN THE MORNING. UV
INDEX 5 OR MODERATE.
GUELPH - ERIN - SOUTHERN WELLINGTON COUNTY.
TODAY..MAINLY CLOUDY. 40 PERCENT CHANCE OF FLURRIES THIS MORNING.
WIND NORTHWEST 20 KM/H GUSTING TO 40. HIGH PLUS 3. WIND CHILL
MINUS 10 THIS MORNING. UV INDEX 4 OR MODERATE.
TONIGHT..CLEARING THIS EVENING. WIND UP TO 15 KM/H. LOW MINUS 4. WIND
CHILL MINUS 9 OVERNIGHT.
TUESDAY..A MIX OF SUN AND CLOUD. WIND BECOMING SOUTH 30 KM/H GUSTING
TO 50 IN THE MORNING. HIGH 9. WIND CHILL MINUS 9 IN THE MORNING. UV
INDEX 6 OR HIGH.
MOUNT FOREST - ARTHUR - NORTHERN WELLINGTON COUNTY.
TODAY..MAINLY CLOUDY. 40 PERCENT CHANCE OF FLURRIES THIS MORNING.
CLEARING THIS AFTERNOON. WIND NORTHWEST 20 KM/H GUSTING TO 40. HIGH
PLUS 2. WIND CHILL MINUS 10 THIS MORNING. UV INDEX 4 OR MODERATE.
TONIGHT..CLEAR. BECOMING PARTLY CLOUDY OVERNIGHT. WIND UP TO 15 KM/H.
LOW MINUS 4. WIND CHILL MINUS 9 OVERNIGHT.
TUESDAY..A MIX OF SUN AND CLOUD. WIND BECOMING SOUTH 30 KM/H GUSTING
TO 50 IN THE MORNING. HIGH 9. WIND CHILL MINUS 9 IN THE MORNING. UV
INDEX 5 OR MODERATE.
SAUGEEN SHORES - KINCARDINE - SOUTHERN BRUCE COUNTY.
TODAY..MAINLY CLOUDY. 40 PERCENT CHANCE OF FLURRIES THIS MORNING.
CLEARING THIS AFTERNOON. WIND NORTHWEST 20 KM/H GUSTING TO 40. HIGH
PLUS 1. WIND CHILL MINUS 9 THIS MORNING. UV INDEX 4 OR MODERATE.
TONIGHT..CLEAR. BECOMING PARTLY CLOUDY AFTER MIDNIGHT. WIND UP TO 15
KM/H. LOW MINUS 4. WIND CHILL MINUS 9 OVERNIGHT.
TUESDAY..CLEARING IN THE MORNING. WIND SOUTH 30 KM/H GUSTING TO 50.
HIGH 10. WIND CHILL MINUS 9 IN THE MORNING. UV INDEX 6 OR HIGH.
REMAINDER UNCHANGED.
END
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