Ottawa Weather Year-Round — Best Time to Visit
Ottawa, Canada has cool weather year-round. The best time to visit is August (score: 82/100). Annual average high: 11.5°C, total rainfall: 1004mm.
When is the best time to visit Ottawa?
82
August is the best month to visit Ottawa with a travel score of 82/100 (Excellent).
Expect highs of 24.7°C, 11 rain days, and 11 hours of daily sunshine.
View August weather details →Travel Score by Month
37
Jan
43
Feb
49
Mar
62
Apr
75
May
81
Jun
81
Jul
82
Aug
77
Sep
59
Oct
47
Nov
34
Dec
Excellent (80+)
Good (60-79)
Mixed (40-59)
Poor (<40)
What are the average temperatures in Ottawa each month?
11.5°C
Avg High
2.7°C
Avg Low
1004mm
Annual Rain
How much rain does Ottawa get?
Ottawa receives 1004mm of rain annually. The wettest month is typically June with 104mm, while February is the driest.
What is the weather like each month in Ottawa?
January
37
-5°C
Low: -14°C
10 rain days
Poor
February
43
-3°C
Low: -13°C
9 rain days
Mixed
March
49
3°C
Low: -7°C
10 rain days
Mixed
April
62
11°C
Low: 1°C
11 rain days
Good
May
75
19°C
Low: 8°C
11 rain days
Good
June
81
24°C
Low: 14°C
11 rain days
Excellent
July
81
26°C
Low: 17°C
12 rain days
Excellent
August
Best time to visit82
25°C
Low: 16°C
11 rain days
Excellent
September
77
21°C
Low: 12°C
9 rain days
Good
October
59
13°C
Low: 6°C
11 rain days
Mixed
November
47
6°C
Low: -1°C
10 rain days
Mixed
December
34
-1°C
Low: -7°C
11 rain days
Poor
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Data based on 1994–2024 averages · Last updated: 2024-12-31