S
M
T
W
T
F
S
29
40°
26°
30
36°
25°
1
28°
23°
2
31°
22°
3
35°
25°
4
38°
25°
5
33°
23°
6
32°
20°
7
24°
18°
8
25°
19°
9
35°
22°
10
37°
22°
11
36°
21°
12
36°
20°
13
34°
19°
14
20°
19°
15
30°
17°
16
31°
13°
17
30°
14°
18
28°
12°
19
25°
6°
20
22°
4°
21
18°
16°
22
28°
14°
23
30°
14°
24
28°
10°
25
28°
11°
26
24°
15°
27
28°
16°
28
31°
14°
29
30°
13°
30
29°
7°
31
26°
-2°
1
24°
-4°
2
14°
4°
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 14° to 40°, with overnight lows between -4° and 26°. The average high for December is 29° with an average low of 16°. 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.
