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