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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
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Daily Historical Averages
January 2026
S
M
T
W
T
F
S
1
2
3
4
5
6
7
8
9
10
11
15°
12
15°
13
15°
14
15°
15
17°
16
17°
17
15°
18
17°
19
16°
20
14°
21
12°
22
11°
23
13°
24
12°
25
13°
26
27
28
29
30
31
Forecast
Sunday, January 11, 2026
Day
15°
Feels 15
Wind
4 km/h E
Gust
6 km/h
Humidity
55%
P.O.P
20%
Night
5°
Feels 4
Wind
4 km/h E
Gust
6 km/h
Humidity
86%
P.O.P
20%
Historical Averages
Jan 11
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity
Historical Averages are based on data recorded from 2000 onwards.