Oshawa Friday weather will be mainly cloudy with a 30 per cent chance of showers and a daytime high of 12 C, according to Environment Canada’s forecast issued at 8:15 a.m. EDT on October 30, 2026.
West winds are expected to reach 30 km/h, gusting to 50 km/h. The UV index is forecast to be 2, or low.
Cool night, with fog possible
The forecast calls for mainly cloudy skies tonight and a low of 1 C. Fog patches are expected to develop overnight.
Northwest winds of 20 km/h are expected to become light during the evening. Drivers travelling late tonight or early Saturday should check the updated local forecast before leaving.
Halloween forecast looks brighter
For Saturday, October 31, Environment Canada forecasts mainly sunny conditions in Oshawa with a high of 14 C. Any morning fog patches are expected to dissipate. The UV index is forecast to reach 3, or moderate.
Saturday night is expected to be clear with a low of 3 C. Sunday’s outlook is sunny with a high of 15 C and a clear night with a low of 7 C.
The Oshawa Friday weather forecast may change as conditions develop. Check Environment Canada for the latest conditions and any alerts before travelling or making outdoor plans.
Source
Environment Canada’s Oshawa forecast, issued October 30, 2026, at 8:15 a.m. EDT.
