S
M
T
W
T
F
S
29
37°
20°
30
31°
13°
1
24°
12°
2
30°
20°
3
37°
20°
4
35°
19°
5
33°
18°
6
31°
14°
7
21°
12°
8
30°
17°
9
35°
18°
10
35°
17°
11
34°
17°
12
33°
16°
13
34°
17°
14
23°
13°
15
28°
13°
16
29°
10°
17
30°
6°
18
28°
1°
19
19°
-4°
20
16°
2°
21
17°
11°
22
28°
8°
23
29°
4°
24
23°
9°
25
24°
10°
26
28°
10°
27
28°
6°
28
27°
-3°
29
22°
-1°
30
15°
-4°
31
16°
-9°
1
15°
-1°
2
13°
7°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Buffalo
Buffalo's December 2026 forecast shows daily high temperatures ranging from 13° to 37°, with overnight lows between -9° and 20°. The average high for December is 27° 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 Buffalo. See also: January | February | March.
