S
M
T
W
T
F
S
29
47°
25°
30
39°
20°
1
39°
20°
2
40°
25°
3
39°
20°
4
40°
26°
5
40°
24°
6
40°
22°
7
39°
19°
8
39°
21°
9
38°
23°
10
37°
27°
11
40°
25°
12
43°
19°
13
43°
17°
14
36°
15°
15
34°
18°
16
35°
18°
17
35°
19°
18
36°
18°
19
37°
24°
20
36°
20°
21
37°
23°
22
37°
23°
23
38°
20°
24
37°
22°
25
37°
23°
26
39°
17°
27
38°
19°
28
37°
25°
29
38°
27°
30
41°
18°
31
43°
17°
1
40°
20°
2
44°
22°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Alturas
Alturas's December 2026 forecast shows daily high temperatures ranging from 34° to 47°, with overnight lows between 15° and 27°. The average high for December is 39° 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 Alturas. See also: January | February | March.
