S
M
T
W
T
F
S
29
37°
18°
30
33°
16°
1
34°
25°
2
37°
27°
3
41°
27°
4
34°
22°
5
32°
18°
6
33°
17°
7
32°
16°
8
33°
18°
9
34°
17°
10
36°
20°
11
37°
20°
12
40°
23°
13
41°
25°
14
38°
27°
15
36°
20°
16
38°
19°
17
32°
22°
18
36°
24°
19
37°
25°
20
39°
23°
21
39°
18°
22
34°
22°
23
36°
19°
24
39°
24°
25
35°
29°
26
40°
16°
27
40°
13°
28
32°
22°
29
30°
17°
30
38°
20°
31
33°
22°
1
38°
26°
2
38°
17°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Twin Falls
Twin Falls's December 2026 forecast shows daily high temperatures ranging from 30° to 41°, with overnight lows between 13° and 29°. The average high for December is 36° with an average low of 21°. 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 Twin Falls. See also: January | February | March.
