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Monthly
Forecasts
Current
Hourly
7 Days
14 Days
Monthly
°C
Temperature Unit Selection
°Celsius
°Fahrenheit
Monthly Historical Averages
Petaluma, CA
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January
Average Temperature
High
15°
Feels 14
Low
4°
Feels 3
Average Precipitation
6 Days
Rain amount
35.8mm
Snow amount
0cm
Content continues below
Daily Historical Averages
January 2026
S
M
T
W
T
F
S
1
2
3
4
5
6
7
8
9
10
11
12
15°
13
16°
14
16°
15
17°
16
17°
17
17°
18
16°
19
16°
20
14°
21
12°
22
11°
23
12°
24
11°
25
11°
26
12°
27
28
29
30
31
Forecast
Monday, January 12, 2026
Day
15°
Feels 15
Wind
6 km/h E
Gust
9 km/h
Humidity
65%
P.O.P
0%
Night
5°
Feels 4
Wind
5 km/h E
Gust
7 km/h
Humidity
88%
P.O.P
0%
Historical Averages
Jan 12
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity
Historical Averages are based on data recorded from 2000 onwards.