Best Time to Visit Oshawa
Best time: Jul, Jun, Aug, May.
Jul is warmest (26.3°C high); Sep is rainiest (93 mm).
Oshawa weather by month
| Month | High °C | Low °C | Rain mm | Sun hrs |
|---|---|---|---|---|
| Jan | -1.8 | -10 | 60 | 2.2 |
| Feb | -0.7 | -8.9 | 56 | 3.7 |
| Mar | 4.2 | -4.3 | 55 | 5.5 |
| Apr | 11.2 | 2 | 73 | 7.2 |
| May | 18.2 | 7.9 | 80 | 8.7 |
| Jun | 23.4 | 12.7 | 77 | 9.7 |
| Jul | 26.3 | 15.7 | 72 | 9.5 |
| Aug | 25.3 | 15.1 | 83 | 8.2 |
| Sep | 20.9 | 11.1 | 93 | 6.3 |
| Oct | 13.9 | 4.9 | 73 | 3.9 |
| Nov | 7.2 | 0.1 | 86 | 2.2 |
| Dec | 1.3 | -6.1 | 69 | 1.8 |
Average high temperature
Best months by activity
Overall: JulJunAugMay
Beaches: JulAugJun
Hiking: JunJulMayAug
Sightseeing: JulJunAugMay
Oshawa quick facts
What to pack
Cold months (Jan, Feb, Mar, Apr, Nov, Dec): warm layers and a coat.
Wet months (Sep): raincoat and umbrella.
Frequently asked questions
When is the best time to visit Oshawa?
Jul, Jun, Aug, May.
What is the rainiest month?
Sep, about 93 mm.
What is the warmest month?
Jul, with average highs of 26.3°C.
Where to stay
See Oshawa hotels · Book Oshawa tours & activities
All destinations · Best time to visit Toronto · Best time to visit Abbotsford · Best time to visit Ahuntsic-Cartierville · Best time to visit Ajax
Climate data: Open-Meteo Historical (ERA5), 1991–2020 climate normals.
Licensed under CC BY 4.0.
Open-Meteo.