Petaluma Weather Year-Round — Best Time to Visit
Petaluma, United States has mild weather year-round. The best time to visit is August (score: 96/100). Annual average high: 20.4°C, total rainfall: 685mm.
When is the best time to visit Petaluma?
96
August is the best month to visit Petaluma with a travel score of 96/100 (Excellent).
Expect highs of 26.5°C, 0 rain days, and 12.6 hours of daily sunshine.
View August weather details →Travel Score by Month
60
Jan
66
Feb
71
Mar
79
Apr
87
May
94
Jun
96
Jul
96
Aug
96
Sep
89
Oct
73
Nov
59
Dec
Excellent (80+)
Good (60-79)
Mixed (40-59)
Poor (<40)
What are the average temperatures in Petaluma each month?
20.4°C
Avg High
9.6°C
Avg Low
685mm
Annual Rain
How much rain does Petaluma get?
Petaluma receives 685mm of rain annually. The wettest month is typically December with 142mm, while July is the driest.
What is the weather like each month in Petaluma?
January
60
14°C
Low: 6°C
10 rain days
Mixed
February
66
15°C
Low: 6°C
9 rain days
Good
March
71
17°C
Low: 7°C
9 rain days
Good
April
79
19°C
Low: 8°C
5 rain days
Good
May
87
22°C
Low: 11°C
3 rain days
Excellent
June
94
25°C
Low: 12°C
1 rain days
Excellent
July
96
26°C
Low: 13°C
0 rain days
Excellent
August
Best time to visit96
27°C
Low: 14°C
0 rain days
Excellent
September
96
26°C
Low: 13°C
1 rain days
Excellent
October
89
23°C
Low: 11°C
3 rain days
Excellent
November
73
18°C
Low: 8°C
6 rain days
Good
December
59
14°C
Low: 6°C
10 rain days
Mixed
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Data based on 1994–2024 averages · Last updated: 2024-12-31