S
M
T
W
T
F
S
29
42°
28°
30
39°
26°
1
29°
25°
2
32°
19°
3
31°
24°
4
35°
25°
5
34°
25°
6
31°
17°
7
24°
10°
8
23°
13°
9
26°
15°
10
34°
23°
11
34°
22°
12
36°
21°
13
34°
22°
14
23°
22°
15
32°
17°
16
32°
17°
17
29°
18°
18
30°
16°
19
28°
11°
20
26°
6°
21
23°
17°
22
29°
14°
23
30°
17°
24
28°
12°
25
30°
10°
26
25°
17°
27
26°
18°
28
31°
16°
29
29°
12°
30
27°
10°
31
26°
2°
1
27°
-1°
2
16°
4°
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 16° to 42°, with overnight lows between -1° and 28°. 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 Rochester. See also: January | February | March.
