S
M
T
W
T
F
S
29
42°
29°
30
39°
28°
1
36°
25°
2
36°
28°
3
34°
24°
4
36°
20°
5
34°
23°
6
33°
25°
7
32°
22°
8
35°
17°
9
33°
15°
10
28°
13°
11
26°
26°
12
40°
21°
13
34°
26°
14
37°
27°
15
Hist. Avg.
34°
21°
16
Hist. Avg.
34°
20°
17
Hist. Avg.
34°
20°
18
Hist. Avg.
33°
20°
19
Hist. Avg.
33°
19°
20
Hist. Avg.
33°
19°
21
Hist. Avg.
33°
19°
22
Hist. Avg.
32°
18°
23
Hist. Avg.
32°
18°
24
Hist. Avg.
32°
18°
25
Hist. Avg.
32°
17°
26
Hist. Avg.
31°
17°
27
Hist. Avg.
31°
17°
28
Hist. Avg.
31°
16°
29
Hist. Avg.
31°
16°
30
Hist. Avg.
30°
16°
31
Hist. Avg.
30°
15°
1
Hist. Avg.
30°
15°
2
Hist. Avg.
30°
15°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
December Weather in Lewiston
Lewiston's December 2026 forecast shows daily high temperatures ranging from 26° to 42°, with overnight lows between 13° and 29°. 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.
