S
M
T
W
T
F
S
29
37°
28°
30
37°
25°
1
36°
23°
2
35°
24°
3
36°
28°
4
39°
27°
5
39°
30°
6
41°
30°
7
37°
32°
8
34°
33°
9
35°
27°
10
34°
27°
11
46°
28°
12
44°
30°
13
36°
29°
14
39°
25°
15
38°
21°
16
33°
26°
17
34°
28°
18
37°
29°
19
37°
31°
20
38°
31°
21
38°
32°
22
41°
32°
23
43°
35°
24
45°
31°
25
46°
23°
26
45°
25°
27
32°
21°
28
33°
26°
29
33°
29°
30
41°
30°
31
42°
32°
1
43°
31°
2
45°
27°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Rochester
Rochester's December 2026 forecast shows daily high temperatures ranging from 32° to 46°, with overnight lows between 21° and 35°. The average high for December is 39° with an average low of 28°. 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 Rochester. See also: January | February | March.
