Cornwall - weather

april 3, 2026

Cornwall

Heavy rain this weekend. What: Total rainfall amounts of 25 to 50 mm. When: Saturday into Saturday night. Additional Information: A Colorado low will bring heavy rain to the area. The heaviest rain is expected to fall Saturday evening and Saturday night, with locally higher amounts possible in thunderstorms. There remains some uncertainty where the highest rainfall amounts will occur. Rainfall warnings may follow as the event nears. For information concerning flooding, please consult your local Conservation Authority or Ontario Ministry of Natural Resources office. Visit Ontario.ca/floods for the latest details. ### Please continue to monitor alerts and forecasts issued by Environment Canada. To report severe weather, send an email to [email protected] or post reports on X using #ONStorm. 00:38 To 16:38