S
M
T
W
T
F
S
29
36°
18°
30
35°
19°
1
37°
22°
2
37°
28°
3
42°
29°
4
42°
26°
5
43°
21°
6
39°
18°
7
37°
21°
8
35°
24°
9
40°
25°
10
39°
22°
11
Hist. Avg.
39°
23°
12
Hist. Avg.
38°
23°
13
Hist. Avg.
38°
23°
14
Hist. Avg.
38°
23°
15
Hist. Avg.
38°
23°
16
Hist. Avg.
38°
23°
17
Hist. Avg.
37°
23°
18
Hist. Avg.
37°
23°
19
Hist. Avg.
37°
23°
20
Hist. Avg.
37°
23°
21
Hist. Avg.
37°
23°
22
Hist. Avg.
37°
23°
23
Hist. Avg.
37°
23°
24
Hist. Avg.
37°
23°
25
Hist. Avg.
37°
23°
26
Hist. Avg.
37°
23°
27
Hist. Avg.
37°
23°
28
Hist. Avg.
37°
23°
29
Hist. Avg.
37°
23°
30
Hist. Avg.
37°
23°
31
Hist. Avg.
37°
23°
1
Hist. Avg.
37°
23°
2
Hist. Avg.
37°
23°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
December Weather in Ahtanum
Ahtanum's December 2026 forecast shows daily high temperatures ranging from 35° to 43°, with overnight lows between 18° and 29°. The average high for December is 39° 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 Ahtanum. See also: January | February | March.
