Ottawa South Weather Year-Round — Best Time to Visit
Ottawa South, Canada has cool weather year-round. The best time to visit is August (score: 82/100). Annual average high: 11.6°C, total rainfall: 996mm.
When is the best time to visit Ottawa South?
82
August is the best month to visit Ottawa South with a travel score of 82/100 (Excellent).
Expect highs of 24.8°C, 11 rain days, and 11 hours of daily sunshine.
View August weather details →Travel Score by Month
37
Jan
43
Feb
50
Mar
62
Apr
75
May
81
Jun
82
Jul
82
Aug
77
Sep
60
Oct
47
Nov
34
Dec
Excellent (80+)
Good (60-79)
Mixed (40-59)
Poor (<40)
What are the average temperatures in Ottawa South each month?
11.6°C
Avg High
2.7°C
Avg Low
996mm
Annual Rain
How much rain does Ottawa South get?
Ottawa South receives 996mm of rain annually. The wettest month is typically June with 103mm, while February is the driest.
What is the weather like each month in Ottawa South?
January
37
-5°C
Low: -14°C
10 rain days
Poor
February
43
-3°C
Low: -12°C
9 rain days
Mixed
March
50
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
82
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
60
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