893   
FPCN51 CWTO 121924  
EXTENDED FORECASTS FROM SUNDAY 14 SEPTEMBER TO THURSDAY 18 SEPTEMBER  
FOR SOUTHERN ONTARIO AND THE NATIONAL CAPITAL REGION ISSUED BY  
ENVIRONMENT CANADA AT 3:30 P.M. EDT FRIDAY 12 SEPTEMBER 2025.  
THE NEXT SCHEDULED FORECAST WILL BE ISSUED AT 5:00 A.M. EDT SATURDAY.  
  
CITY OF TORONTO.  
SUNDAY..SUNNY. HIGH 24.  
SUNDAY NIGHT..CLEAR. LOW 15.  
MONDAY..SUNNY. HIGH 25.  
MONDAY NIGHT..CLEAR. LOW 14.  
TUESDAY..SUNNY. HIGH 25.  
TUESDAY NIGHT..CLOUDY PERIODS. LOW 14.  
WEDNESDAY..A MIX OF SUN AND CLOUD. HIGH 26.  
WEDNESDAY NIGHT..CLOUDY PERIODS. LOW 15.  
THURSDAY..A MIX OF SUN AND CLOUD. HIGH 27.  
NORMALS FOR THE PERIOD..LOW 12. HIGH 21.  
  
WINDSOR - ESSEX - CHATHAM-KENT.  
SUNDAY..SUNNY. HIGH 27.  
SUNDAY NIGHT..CLEAR. LOW 15.  
MONDAY..SUNNY. HIGH 28.  
MONDAY NIGHT..CLEAR. LOW 13.  
TUESDAY..SUNNY. HIGH 27.  
TUESDAY NIGHT..CLEAR. LOW 15.  
WEDNESDAY..A MIX OF SUN AND CLOUD. HIGH 28.  
WEDNESDAY NIGHT..CLOUDY PERIODS. LOW 16.  
THURSDAY..A MIX OF SUN AND CLOUD. HIGH 28.  
NORMALS FOR THE PERIOD..LOW 12. HIGH 23.  
  
SARNIA - LAMBTON.  
SUNDAY..SUNNY. HIGH 27.  
SUNDAY NIGHT..CLEAR. LOW 14.  
MONDAY..SUNNY. HIGH 28.  
MONDAY NIGHT..CLEAR. LOW 11.  
TUESDAY..SUNNY. HIGH 29.  
TUESDAY NIGHT..CLEAR. LOW 15.  
WEDNESDAY..A MIX OF SUN AND CLOUD. HIGH 27.  
WEDNESDAY NIGHT..CLOUDY PERIODS. LOW 16.  
THURSDAY..A MIX OF SUN AND CLOUD. HIGH 28.  
NORMALS FOR THE PERIOD..LOW 11. HIGH 22.  
  
ELGIN.  
SUNDAY..SUNNY. HIGH 26.  
SUNDAY NIGHT..CLEAR. LOW 14.  
MONDAY..SUNNY. HIGH 27.  
MONDAY NIGHT..CLEAR. LOW 13.  
TUESDAY..SUNNY. HIGH 28.  
TUESDAY NIGHT..CLEAR. LOW 13.  
WEDNESDAY..A MIX OF SUN AND CLOUD. HIGH 27.  
WEDNESDAY NIGHT..CLOUDY PERIODS. LOW 15.  
THURSDAY..A MIX OF SUN AND CLOUD. HIGH 27.  
NORMALS FOR THE PERIOD..LOW 12. HIGH 22.  
  
LONDON - MIDDLESEX.  
SUNDAY..SUNNY. HIGH 27.  
SUNDAY NIGHT..CLEAR. LOW 13.  
MONDAY..SUNNY. HIGH 28.  
MONDAY NIGHT..CLEAR. LOW 12.  
TUESDAY..SUNNY. HIGH 29.  
TUESDAY NIGHT..CLEAR. LOW 12.  
WEDNESDAY..A MIX OF SUN AND CLOUD. HIGH 27.  
WEDNESDAY NIGHT..CLOUDY PERIODS. LOW 14.  
THURSDAY..A MIX OF SUN AND CLOUD. HIGH 28.  
NORMALS FOR THE PERIOD..LOW 11. HIGH 22.  
  
SIMCOE - DELHI - NORFOLK.  
SUNDAY..SUNNY. HIGH 25.  
SUNDAY NIGHT..CLEAR. LOW 12.  
MONDAY..SUNNY. HIGH 26.  
MONDAY NIGHT..CLEAR. LOW 13.  
TUESDAY..SUNNY. HIGH 27.  
TUESDAY NIGHT..CLEAR. LOW 14.  
WEDNESDAY..A MIX OF SUN AND CLOUD. HIGH 26.  
WEDNESDAY NIGHT..CLOUDY PERIODS. LOW 15.  
THURSDAY..A MIX OF SUN AND CLOUD. HIGH 27.  
NORMALS FOR THE PERIOD..LOW 10. HIGH 21.  
  
DUNNVILLE - CALEDONIA - HALDIMAND.  
SUNDAY..SUNNY. HIGH 24.  
SUNDAY NIGHT..CLEAR. LOW 12.  
MONDAY..SUNNY. HIGH 25.  
MONDAY NIGHT..CLEAR. LOW 13.  
TUESDAY..SUNNY. HIGH 27.  
TUESDAY NIGHT..CLEAR. LOW 15.  
WEDNESDAY..A MIX OF SUN AND CLOUD. HIGH 25.  
WEDNESDAY NIGHT..CLOUDY PERIODS. LOW 16.  
THURSDAY..A MIX OF SUN AND CLOUD. HIGH 26.  
NORMALS FOR THE PERIOD..LOW 11. HIGH 21.  
  
OXFORD - BRANT.  
SUNDAY..SUNNY. HIGH 25.  
SUNDAY NIGHT..CLEAR. LOW 13.  
MONDAY..SUNNY. HIGH 26.  
MONDAY NIGHT..CLEAR. LOW 12.  
TUESDAY..SUNNY. HIGH 28.  
TUESDAY NIGHT..CLOUDY PERIODS. LOW 12.  
WEDNESDAY..A MIX OF SUN AND CLOUD. HIGH 26.  
WEDNESDAY NIGHT..CLOUDY PERIODS. LOW 15.  
THURSDAY..A MIX OF SUN AND CLOUD. HIGH 27.  
NORMALS FOR THE PERIOD..LOW 11. HIGH 22.  
  
NIAGARA.  
SUNDAY..SUNNY. HIGH 23.  
SUNDAY NIGHT..CLEAR. LOW 14.  
MONDAY..SUNNY. HIGH 25.  
MONDAY NIGHT..CLEAR. LOW 15.  
TUESDAY..SUNNY. HIGH 25.  
TUESDAY NIGHT..CLOUDY PERIODS. LOW 16.  
WEDNESDAY..A MIX OF SUN AND CLOUD. HIGH 24.  
WEDNESDAY NIGHT..CLOUDY PERIODS. LOW 17.  
THURSDAY..A MIX OF SUN AND CLOUD. HIGH 25.  
NORMALS FOR THE PERIOD..LOW 13. HIGH 21.  
  
CITY OF HAMILTON.  
SUNDAY..SUNNY. HIGH 24.  
SUNDAY NIGHT..CLEAR. LOW 13.  
MONDAY..SUNNY. HIGH 25.  
MONDAY NIGHT..CLEAR. LOW 13.  
TUESDAY..SUNNY. HIGH 25.  
TUESDAY NIGHT..CLOUDY PERIODS. LOW 16.  
WEDNESDAY..A MIX OF SUN AND CLOUD. HIGH 25.  
WEDNESDAY NIGHT..CLOUDY PERIODS. LOW 17.  
THURSDAY..A MIX OF SUN AND CLOUD. HIGH 26.  
NORMALS FOR THE PERIOD..LOW 10. HIGH 21.  
  
HALTON - PEEL.  
SUNDAY..SUNNY. HIGH 24.  
SUNDAY NIGHT..CLEAR. LOW 13.  
MONDAY..SUNNY. HIGH 25.  
MONDAY NIGHT..CLEAR. LOW 11.  
TUESDAY..SUNNY. HIGH 25.  
TUESDAY NIGHT..CLOUDY PERIODS. LOW 13.  
WEDNESDAY..A MIX OF SUN AND CLOUD. HIGH 25.  
WEDNESDAY NIGHT..CLOUDY PERIODS. LOW 14.  
THURSDAY..A MIX OF SUN AND CLOUD. HIGH 27.  
NORMALS FOR THE PERIOD..LOW 10. HIGH 21.  
  
YORK - DURHAM.  
SUNDAY..SUNNY. HIGH 25.  
SUNDAY NIGHT..CLEAR. LOW 11.  
MONDAY..SUNNY. HIGH 25.  
MONDAY NIGHT..CLEAR. LOW 10.  
TUESDAY..SUNNY. HIGH 26.  
TUESDAY NIGHT..CLOUDY PERIODS. LOW 13.  
WEDNESDAY..A MIX OF SUN AND CLOUD. HIGH 25.  
WEDNESDAY NIGHT..CLOUDY PERIODS. LOW 14.  
THURSDAY..A MIX OF SUN AND CLOUD. HIGH 26.  
NORMALS FOR THE PERIOD..LOW 10. HIGH 20.  
  
HURON - PERTH.  
SUNDAY..SUNNY. HIGH 25.  
SUNDAY NIGHT..CLEAR. LOW 13.  
MONDAY..SUNNY. HIGH 26.  
MONDAY NIGHT..CLEAR. LOW 11.  
TUESDAY..SUNNY. HIGH 28.  
TUESDAY NIGHT..CLOUDY PERIODS. LOW 13.  
WEDNESDAY..A MIX OF SUN AND CLOUD. HIGH 26.  
WEDNESDAY NIGHT..CLOUDY PERIODS. LOW 13.  
THURSDAY..A MIX OF SUN AND CLOUD. HIGH 27.  
NORMALS FOR THE PERIOD..LOW 10. HIGH 20.  
  
WATERLOO - WELLINGTON.  
SUNDAY..SUNNY. HIGH 25.  
SUNDAY NIGHT..CLEAR. LOW 11.  
MONDAY..SUNNY. HIGH 26.  
MONDAY NIGHT..CLEAR. LOW 10.  
TUESDAY..SUNNY. HIGH 27.  
TUESDAY NIGHT..CLOUDY PERIODS. LOW 13.  
WEDNESDAY..A MIX OF SUN AND CLOUD. HIGH 26.  
WEDNESDAY NIGHT..CLOUDY PERIODS. LOW 14.  
THURSDAY..A MIX OF SUN AND CLOUD. HIGH 26.  
NORMALS FOR THE PERIOD..LOW 10. HIGH 20.  
  
DUFFERIN - INNISFIL.  
SUNDAY..CLEARING. HIGH 24.  
SUNDAY NIGHT..CLEAR. LOW 10.  
MONDAY..SUNNY. HIGH 25.  
MONDAY NIGHT..CLEAR. LOW 9.  
TUESDAY..SUNNY. HIGH 26.  
TUESDAY NIGHT..CLOUDY PERIODS. LOW 13.  
WEDNESDAY..A MIX OF SUN AND CLOUD. HIGH 25.  
WEDNESDAY NIGHT..CLOUDY PERIODS. LOW 14.  
THURSDAY..A MIX OF SUN AND CLOUD. HIGH 26.  
NORMALS FOR THE PERIOD..LOW 9. HIGH 20.  
  
GREY - BRUCE.  
SUNDAY..CLEARING. HIGH 23.  
SUNDAY NIGHT..CLEAR. LOW 12.  
MONDAY..SUNNY. HIGH 26.  
MONDAY NIGHT..CLEAR. LOW 12.  
TUESDAY..SUNNY. HIGH 28.  
TUESDAY NIGHT..CLEAR. LOW 13.  
WEDNESDAY..A MIX OF SUN AND CLOUD. HIGH 24.  
WEDNESDAY NIGHT..CLOUDY PERIODS. LOW 14.  
THURSDAY..A MIX OF SUN AND CLOUD. HIGH 25.  
NORMALS FOR THE PERIOD..LOW 11. HIGH 20.  
  
BARRIE - ORILLIA - MIDLAND.  
SUNDAY..CLEARING. HIGH 24.  
SUNDAY NIGHT..CLEAR. LOW 12.  
MONDAY..SUNNY. HIGH 25.  
MONDAY NIGHT..CLEAR. LOW 10.  
TUESDAY..SUNNY. HIGH 26.  
TUESDAY NIGHT..CLEAR. LOW 11.  
WEDNESDAY..A MIX OF SUN AND CLOUD. HIGH 25.  
WEDNESDAY NIGHT..CLOUDY PERIODS. LOW 13.  
THURSDAY..A MIX OF SUN AND CLOUD. HIGH 26.  
NORMALS FOR THE PERIOD..LOW 9. HIGH 20.  
  
BELLEVILLE - QUINTE - NORTHUMBERLAND.  
SUNDAY..SUNNY. HIGH 25.  
SUNDAY NIGHT..CLEAR. LOW 12.  
MONDAY..SUNNY. HIGH 25.  
MONDAY NIGHT..CLEAR. LOW 11.  
TUESDAY..SUNNY. HIGH 26.  
TUESDAY NIGHT..CLEAR. LOW 12.  
WEDNESDAY..A MIX OF SUN AND CLOUD. HIGH 25.  
WEDNESDAY NIGHT..CLOUDY PERIODS. LOW 13.  
THURSDAY..A MIX OF SUN AND CLOUD. HIGH 26.  
NORMALS FOR THE PERIOD..LOW 10. HIGH 20.  
  
KINGSTON - PRINCE EDWARD.  
SUNDAY..SUNNY. HIGH 25.  
SUNDAY NIGHT..CLEAR. LOW 12.  
MONDAY..SUNNY. HIGH 25.  
MONDAY NIGHT..CLEAR. LOW 11.  
TUESDAY..SUNNY. HIGH 26.  
TUESDAY NIGHT..CLEAR. LOW 12.  
WEDNESDAY..A MIX OF SUN AND CLOUD. HIGH 25.  
WEDNESDAY NIGHT..CLOUDY PERIODS. LOW 13.  
THURSDAY..A MIX OF SUN AND CLOUD. HIGH 26.  
NORMALS FOR THE PERIOD..LOW 10. HIGH 20.  
  
PETERBOROUGH - KAWARTHA LAKES.  
SUNDAY..CLEARING. HIGH 25.  
SUNDAY NIGHT..CLEAR. LOW 9.  
MONDAY..SUNNY. HIGH 26.  
MONDAY NIGHT..CLEAR. LOW 8.  
TUESDAY..SUNNY. HIGH 26.  
TUESDAY NIGHT..CLEAR. LOW 9.  
WEDNESDAY..A MIX OF SUN AND CLOUD. HIGH 26.  
WEDNESDAY NIGHT..CLOUDY PERIODS. LOW 10.  
THURSDAY..A MIX OF SUN AND CLOUD. HIGH 26.  
NORMALS FOR THE PERIOD..LOW 9. HIGH 20.  
  
STIRLING - TWEED - SOUTH FRONTENAC.  
SUNDAY..SUNNY. HIGH 26.  
SUNDAY NIGHT..CLEAR. LOW 12.  
MONDAY..SUNNY. HIGH 26.  
MONDAY NIGHT..CLEAR. LOW 11.  
TUESDAY..SUNNY. HIGH 27.  
TUESDAY NIGHT..CLEAR. LOW 11.  
WEDNESDAY..A MIX OF SUN AND CLOUD. HIGH 26.  
WEDNESDAY NIGHT..CLOUDY PERIODS. LOW 13.  
THURSDAY..A MIX OF SUN AND CLOUD. HIGH 26.  
NORMALS FOR THE PERIOD..LOW 9. HIGH 20.  
  
BANCROFT - BON ECHO PARK.  
SUNDAY..SUNNY. HIGH 24.  
SUNDAY NIGHT..CLEAR. LOW 7.  
MONDAY..SUNNY. HIGH 26.  
MONDAY NIGHT..CLEAR. LOW 7.  
TUESDAY..SUNNY. HIGH 25.  
TUESDAY NIGHT..CLEAR. LOW 11.  
WEDNESDAY..A MIX OF SUN AND CLOUD. HIGH 26.  
WEDNESDAY NIGHT..CLOUDY PERIODS. LOW 12.  
THURSDAY..A MIX OF SUN AND CLOUD. HIGH 25.  
NORMALS FOR THE PERIOD..LOW 8. HIGH 20.  
  
BROCKVILLE - LEEDS AND GRENVILLE.  
SUNDAY..SUNNY. HIGH 25.  
SUNDAY NIGHT..CLEAR. LOW 12.  
MONDAY..SUNNY. HIGH 25.  
MONDAY NIGHT..CLEAR. LOW 12.  
TUESDAY..SUNNY. HIGH 26.  
TUESDAY NIGHT..CLEAR. LOW 13.  
WEDNESDAY..A MIX OF SUN AND CLOUD. HIGH 25.  
WEDNESDAY NIGHT..CLOUDY PERIODS. LOW 14.  
THURSDAY..A MIX OF SUN AND CLOUD. HIGH 24.  
NORMALS FOR THE PERIOD..LOW 11. HIGH 20.  
  
CITY OF OTTAWA.  
SUNDAY..SUNNY. HIGH 25.  
SUNDAY NIGHT..CLEAR. LOW 10.  
MONDAY..SUNNY. HIGH 25.  
MONDAY NIGHT..CLEAR. LOW 9.  
TUESDAY..SUNNY. HIGH 27.  
TUESDAY NIGHT..CLEAR. LOW 14.  
WEDNESDAY..A MIX OF SUN AND CLOUD. HIGH 27.  
WEDNESDAY NIGHT..CLOUDY PERIODS. LOW 15.  
THURSDAY..A MIX OF SUN AND CLOUD. HIGH 27.  
NORMALS FOR THE PERIOD..LOW 10. HIGH 20.  
  
GATINEAU.  
SUNDAY..SUNNY. HIGH 25.  
SUNDAY NIGHT..CLEAR. LOW 10.  
MONDAY..SUNNY. HIGH 26.  
MONDAY NIGHT..CLEAR. LOW 11.  
TUESDAY..SUNNY. HIGH 28.  
TUESDAY NIGHT..CLEAR. LOW 12.  
WEDNESDAY..A MIX OF SUN AND CLOUD. HIGH 27.  
WEDNESDAY NIGHT..CLOUDY PERIODS. LOW 14.  
THURSDAY..A MIX OF SUN AND CLOUD. HIGH 27.  
NORMALS FOR THE PERIOD..LOW 9. HIGH 19.  
  
PRESCOTT AND RUSSELL.  
SUNDAY..SUNNY. HIGH 25.  
SUNDAY NIGHT..CLEAR. LOW 10.  
MONDAY..SUNNY. HIGH 24.  
MONDAY NIGHT..CLEAR. LOW 9.  
TUESDAY..SUNNY. HIGH 26.  
TUESDAY NIGHT..CLEAR. LOW 14.  
WEDNESDAY..A MIX OF SUN AND CLOUD. HIGH 27.  
WEDNESDAY NIGHT..CLOUDY PERIODS. LOW 15.  
THURSDAY..A MIX OF SUN AND CLOUD. HIGH 27.  
NORMALS FOR THE PERIOD..LOW 10. HIGH 20.  
  
CORNWALL - MORRISBURG.  
SUNDAY..SUNNY. HIGH 25.  
SUNDAY NIGHT..CLEAR. LOW 10.  
MONDAY..SUNNY. HIGH 24.  
MONDAY NIGHT..CLEAR. LOW 9.  
TUESDAY..SUNNY. HIGH 26.  
TUESDAY NIGHT..CLOUDY PERIODS. LOW 14.  
WEDNESDAY..A MIX OF SUN AND CLOUD. HIGH 26.  
WEDNESDAY NIGHT..CLOUDY PERIODS. LOW 15.  
THURSDAY..A MIX OF SUN AND CLOUD. HIGH 26.  
NORMALS FOR THE PERIOD..LOW 10. HIGH 20.  
  
SMITHS FALLS - LANARK - SHARBOT LAKE.  
SUNDAY..SUNNY. HIGH 25.  
SUNDAY NIGHT..CLEAR. LOW 11.  
MONDAY..SUNNY. HIGH 25.  
MONDAY NIGHT..CLEAR. LOW 11.  
TUESDAY..SUNNY. HIGH 26.  
TUESDAY NIGHT..CLEAR. LOW 11.  
WEDNESDAY..A MIX OF SUN AND CLOUD. HIGH 26.  
WEDNESDAY NIGHT..CLOUDY PERIODS. LOW 12.  
THURSDAY..A MIX OF SUN AND CLOUD. HIGH 26.  
NORMALS FOR THE PERIOD..LOW 10. HIGH 20.  
  
PARRY SOUND - MUSKOKA.  
SUNDAY..CLEARING. HIGH 24.  
SUNDAY NIGHT..CLEAR. LOW 10.  
MONDAY..SUNNY. HIGH 26.  
MONDAY NIGHT..CLEAR. LOW 9.  
TUESDAY..SUNNY. HIGH 26.  
TUESDAY NIGHT..CLEAR. LOW 12.  
WEDNESDAY..A MIX OF SUN AND CLOUD. HIGH 25.  
WEDNESDAY NIGHT..CLOUDY PERIODS. LOW 13.  
THURSDAY..A MIX OF SUN AND CLOUD. HIGH 25.  
NORMALS FOR THE PERIOD..LOW 7. HIGH 19.  
  
HALIBURTON.  
SUNDAY..SUNNY. HIGH 23.  
SUNDAY NIGHT..CLEAR. LOW 9.  
MONDAY..SUNNY. HIGH 24.  
MONDAY NIGHT..CLEAR. LOW 8.  
TUESDAY..SUNNY. HIGH 25.  
TUESDAY NIGHT..CLEAR. LOW 11.  
WEDNESDAY..A MIX OF SUN AND CLOUD. HIGH 26.  
WEDNESDAY NIGHT..CLOUDY PERIODS. LOW 12.  
THURSDAY..A MIX OF SUN AND CLOUD. HIGH 25.  
NORMALS FOR THE PERIOD..LOW 7. HIGH 20.  
  
RENFREW - PEMBROKE - BARRY'S BAY.  
SUNDAY..SUNNY. HIGH 24.  
SUNDAY NIGHT..CLEAR. LOW 9.  
MONDAY..SUNNY. HIGH 24.  
MONDAY NIGHT..CLEAR. LOW 7.  
TUESDAY..SUNNY. HIGH 26.  
TUESDAY NIGHT..CLEAR. LOW 11.  
WEDNESDAY..A MIX OF SUN AND CLOUD. HIGH 27.  
WEDNESDAY NIGHT..CLOUDY PERIODS. LOW 12.  
THURSDAY..A MIX OF SUN AND CLOUD. HIGH 27.  
NORMALS FOR THE PERIOD..LOW 7. HIGH 19.  
  
ALGONQUIN.  
SUNDAY..SUNNY. HIGH 23.  
SUNDAY NIGHT..CLEAR. LOW 6.  
MONDAY..SUNNY. HIGH 24.  
MONDAY NIGHT..CLEAR. LOW 7.  
TUESDAY..SUNNY. HIGH 25.  
TUESDAY NIGHT..CLEAR. LOW 11.  
WEDNESDAY..A MIX OF SUN AND CLOUD. HIGH 26.  
WEDNESDAY NIGHT..CLOUDY PERIODS. LOW 13.  
THURSDAY..A MIX OF SUN AND CLOUD. HIGH 26.  
NORMALS FOR THE PERIOD..LOW 7. HIGH 19.  
  
BURK'S FALLS - BAYFIELD INLET.  
SUNDAY..SUNNY. HIGH 23.  
SUNDAY NIGHT..CLEAR. LOW 9.  
MONDAY..SUNNY. HIGH 24.  
MONDAY NIGHT..CLEAR. LOW 9.  
TUESDAY..SUNNY. HIGH 25.  
TUESDAY NIGHT..CLEAR. LOW 12.  
WEDNESDAY..A MIX OF SUN AND CLOUD. HIGH 25.  
WEDNESDAY NIGHT..CLOUDY PERIODS. LOW 13.  
THURSDAY..A MIX OF SUN AND CLOUD. HIGH 25.  
NORMALS FOR THE PERIOD..LOW 9. HIGH 18.  
  
END  
 
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