S
M
T
W
T
F
S
29
38°
28°
30
39°
27°
1
39°
30°
2
38°
25°
3
41°
25°
4
34°
29°
5
35°
31°
6
40°
35°
7
42°
38°
8
50°
32°
9
51°
30°
10
39°
29°
11
38°
28°
12
37°
25°
13
36°
26°
14
35°
24°
15
34°
19°
16
31°
26°
17
33°
24°
18
35°
27°
19
36°
30°
20
37°
33°
21
40°
28°
22
42°
27°
23
38°
31°
24
40°
33°
25
45°
26°
26
41°
22°
27
37°
23°
28
35°
21°
29
36°
22°
30
31°
12°
31
30°
15°
1
25°
18°
2
34°
18°
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 25° to 51°, with overnight lows between 12° and 38°. The average high for December is 37° with an average low of 26°. 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.
