S
M
T
W
T
F
S
29
43°
31°
30
47°
28°
1
42°
26°
2
39°
33°
3
42°
32°
4
46°
32°
5
41°
31°
6
46°
35°
7
46°
33°
8
45°
29°
9
46°
29°
10
40°
28°
11
41°
31°
12
42°
31°
13
37°
32°
14
40°
33°
15
43°
31°
16
46°
29°
17
45°
29°
18
38°
28°
19
38°
27°
20
37°
30°
21
40°
31°
22
41°
32°
23
42°
30°
24
42°
30°
25
41°
28°
26
39°
28°
27
39°
29°
28
40°
28°
29
40°
28°
30
36°
27°
31
39°
21°
1
41°
10°
2
45°
10°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Niagara Falls
Niagara Falls's December 2026 forecast shows daily high temperatures ranging from 36° to 47°, with overnight lows between 10° and 35°. The average high for December is 42° with an average low of 29°. 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 Niagara Falls. See also: January | February | March.
