S
M
T
W
T
F
S
29
43°
33°
30
45°
35°
1
44°
34°
2
44°
35°
3
45°
33°
4
44°
32°
5
44°
32°
6
41°
33°
7
44°
31°
8
40°
29°
9
35°
30°
10
37°
29°
11
38°
29°
12
37°
28°
13
38°
23°
14
38°
17°
15
33°
16°
16
26°
18°
17
28°
17°
18
26°
25°
19
34°
24°
20
38°
23°
21
34°
17°
22
31°
19°
23
31°
13°
24
30°
20°
25
28°
18°
26
33°
13°
27
28°
13°
28
23°
14°
29
27°
14°
30
25°
16°
31
27°
23°
1
38°
21°
2
37°
13°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Lewiston
Lewiston's December 2026 forecast shows daily high temperatures ranging from 23° to 45°, with overnight lows between 13° and 35°. The average high for December is 35° with an average low of 23°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how December weather will actually feel in Lewiston. See also: January | February | March.
