Cornwall to Montréal - Marine Weather - Environment Canada Environment Canada https://www.weather.gc.ca 2026-03-19T09:46:58Z tag:weather.gc.ca,2013-04-16:20260319094658 https://www.weather.gc.ca/template/gcweb/v15.0.0/assets/wmms-alt.png https://www.weather.gc.ca/template/gcweb/v15.0.0/assets/favicon.ico Copyright 2026, Environment Canada Forecast for Today Tonight and Friday. - Cornwall to Montréal 2026-03-19T07:00:00Z 2026-03-19T07:00:00Z Wind southeast 10 to 15 knots veering to southwesterly 10 to 15 near noon then becoming light overnight. Wind becoming northeast 15 Friday morning. Flurries or showers this afternoon and this evening. Snow Friday. Visibility 1 mile or less in precipitation. Temperatures minus 6 rising to plus 3 Friday afternoon. <br/>Issued 03:00 AM EDT 19 March 2026 tag:weather.gc.ca,2013-04-16:02900_regular_forecast:20260319070000 Extended Forecast - Cornwall to Montréal 2026-03-19T10:00:00Z 2026-03-19T10:00:00Z Saturday: Wind light.<br/>Sunday: Wind light increasing to northeast 15 to 25 knots.<br/>Monday: Wind northeast 15 to 20 knots diminishing to northeast 10 to 15 late in the day.<br/>Issued 06:00 AM EDT 19 March 2026 tag:weather.gc.ca,2013-04-16:02900_extended_forecast:20260319100000