Oshawa Weather Year-Round — Best Time to Visit
Oshawa, Canada has cool weather year-round. The best time to visit is August (score: 84/100). Annual average high: 11.9°C, total rainfall: 873mm.
When is the best time to visit Oshawa?
84
August is the best month to visit Oshawa with a travel score of 84/100 (Excellent).
Expect highs of 24.6°C, 9 rain days, and 11.4 hours of daily sunshine.
View August weather details →Travel Score by Month
36
Jan
43
Feb
52
Mar
61
Apr
72
May
79
Jun
83
Jul
84
Aug
81
Sep
63
Oct
52
Nov
40
Dec
Excellent (80+)
Good (60-79)
Mixed (40-59)
Poor (<40)
What are the average temperatures in Oshawa each month?
11.9°C
Avg High
5.2°C
Avg Low
873mm
Annual Rain
How much rain does Oshawa get?
Oshawa receives 873mm of rain annually. The wettest month is typically June with 89mm, while February is the driest.
What is the weather like each month in Oshawa?
January
36
-1°C
Low: -8°C
10 rain days
Poor
February
43
-1°C
Low: -8°C
8 rain days
Mixed
March
52
4°C
Low: -4°C
10 rain days
Mixed
April
61
10°C
Low: 2°C
11 rain days
Good
May
72
16°C
Low: 9°C
10 rain days
Good
June
79
22°C
Low: 15°C
10 rain days
Good
July
83
25°C
Low: 18°C
10 rain days
Excellent
August
Best time to visit84
25°C
Low: 18°C
9 rain days
Excellent
September
81
21°C
Low: 15°C
9 rain days
Excellent
October
63
14°C
Low: 8°C
11 rain days
Good
November
52
7°C
Low: 2°C
10 rain days
Mixed
December
40
2°C
Low: -3°C
11 rain days
Mixed
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Data based on 1994–2024 averages · Last updated: 2024-12-31