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