S
M
T
W
T
F
S
29
40°
26°
30
40°
26°
1
38°
25°
2
41°
31°
3
46°
18°
4
53°
17°
5
45°
21°
6
32°
20°
7
34°
21°
8
35°
16°
9
34°
16°
10
32°
17°
11
29°
19°
12
31°
19°
13
34°
20°
14
31°
23°
15
32°
26°
16
35°
27°
17
36°
22°
18
35°
30°
19
38°
30°
20
37°
26°
21
36°
24°
22
35°
19°
23
32°
21°
24
33°
24°
25
35°
21°
26
34°
23°
27
30°
21°
28
32°
13°
29
34°
19°
30
33°
12°
31
32°
9°
1
Hist. Avg.
35°
22°
2
Hist. Avg.
35°
21°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Tonawanda
Tonawanda's December 2026 forecast shows daily high temperatures ranging from 29° to 53°, with overnight lows between 9° and 31°. The average high for December is 36° 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 Tonawanda. See also: January | February | March.
