S
M
T
W
T
F
S
27
53°
32°
28
53°
36°
29
54°
38°
30
55°
41°
31
56°
36°
1
58°
37°
2
56°
40°
3
57°
34°
4
55°
33°
5
55°
38°
6
54°
37°
7
51°
43°
8
54°
43°
9
59°
42°
10
58°
38°
11
57°
43°
12
58°
42°
13
60°
39°
14
58°
41°
15
55°
43°
16
54°
33°
17
56°
36°
18
61°
38°
19
60°
43°
20
Hist. Avg.
58°
39°
21
Hist. Avg.
58°
39°
22
Hist. Avg.
58°
39°
23
Hist. Avg.
58°
39°
24
Hist. Avg.
58°
40°
25
Hist. Avg.
58°
40°
26
Hist. Avg.
58°
40°
27
Hist. Avg.
58°
40°
28
Hist. Avg.
59°
40°
29
Hist. Avg.
59°
40°
30
Hist. Avg.
59°
40°
31
Hist. Avg.
59°
40°
1
Hist. Avg.
59°
40°
2
Hist. Avg.
59°
40°
3
Hist. Avg.
60°
40°
4
Hist. Avg.
60°
40°
5
Hist. Avg.
60°
40°
6
Hist. Avg.
60°
40°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
January Weather in Petaluma
Petaluma's January 2027 forecast shows daily high temperatures ranging from 51° to 61°, with overnight lows between 32° and 43°. The average high for January is 56° with an average low of 39°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how January weather will actually feel in Petaluma. See also: February | March | April.
