S
M
T
W
T
F
S
27
51°
35°
28
52°
38°
29
53°
40°
30
54°
41°
31
58°
40°
1
55°
37°
2
53°
37°
3
52°
45°
4
57°
44°
5
54°
45°
6
Hist. Avg.
56°
41°
7
Hist. Avg.
56°
41°
8
Hist. Avg.
56°
41°
9
Hist. Avg.
56°
42°
10
Hist. Avg.
56°
42°
11
Hist. Avg.
56°
42°
12
Hist. Avg.
56°
42°
13
Hist. Avg.
56°
42°
14
Hist. Avg.
56°
42°
15
Hist. Avg.
56°
42°
16
Hist. Avg.
56°
42°
17
Hist. Avg.
56°
42°
18
Hist. Avg.
56°
42°
19
Hist. Avg.
57°
42°
20
Hist. Avg.
57°
42°
21
Hist. Avg.
57°
42°
22
Hist. Avg.
57°
42°
23
Hist. Avg.
57°
42°
24
Hist. Avg.
57°
42°
25
Hist. Avg.
57°
42°
26
Hist. Avg.
58°
42°
27
Hist. Avg.
58°
42°
28
Hist. Avg.
58°
43°
29
Hist. Avg.
58°
43°
30
Hist. Avg.
58°
43°
31
Hist. Avg.
58°
43°
1
Hist. Avg.
58°
43°
2
Hist. Avg.
59°
43°
3
Hist. Avg.
59°
43°
4
Hist. Avg.
59°
43°
5
Hist. Avg.
59°
43°
6
Hist. Avg.
59°
43°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
January Weather in Mill Valley
Mill Valley's January 2027 forecast shows daily high temperatures ranging from 51° to 58°, with overnight lows between 35° and 45°. The average high for January is 54° with an average low of 40°. 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 Mill Valley. See also: February | March | April.
