The temperatures in Oshawa in May are quite cold with temperatures between 8°C and 16°C, warm clothes are a must.
You can expect about 3 to 8 days of rain in Oshawa during the month of May. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Our weather forecast can give you a great sense of what weather to expect in Oshawa in May 2025.
If you’re planning to visit Oshawa in the near future, we highly recommend that you review the 14 day weather forecast for Oshawa before you arrive.
Temperatures
16° / 8°
Rainy Days
7
Snowy Days
0
Dry Days
24
Rainfall
134
mm
Sun Hours
9.5
Hrs
