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