S
M
T
W
T
F
S
27
58°
37°
28
57°
44°
29
56°
45°
30
60°
41°
31
61°
37°
1
59°
41°
2
60°
43°
3
61°
36°
4
57°
36°
5
55°
37°
6
57°
36°
7
59°
39°
8
58°
41°
9
56°
39°
10
62°
40°
11
62°
40°
12
63°
38°
13
61°
38°
14
62°
44°
15
63°
41°
16
58°
39°
17
59°
41°
18
61°
40°
19
56°
41°
20
55°
40°
21
55°
42°
22
Hist. Avg.
59°
40°
23
Hist. Avg.
59°
40°
24
Hist. Avg.
59°
41°
25
Hist. Avg.
60°
41°
26
Hist. Avg.
60°
41°
27
Hist. Avg.
60°
41°
28
Hist. Avg.
60°
41°
29
Hist. Avg.
60°
41°
30
Hist. Avg.
60°
41°
31
Hist. Avg.
60°
41°
1
Hist. Avg.
61°
41°
2
Hist. Avg.
61°
41°
3
Hist. Avg.
61°
41°
4
Hist. Avg.
61°
41°
5
Hist. Avg.
62°
41°
6
Hist. Avg.
62°
41°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
January Weather in Napa
Napa's January 2027 forecast shows daily high temperatures ranging from 55° to 63°, with overnight lows between 36° and 45°. The average high for January is 59° 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 Napa. See also: February | March | April.
