S
M
T
W
T
F
S
29
37°
22°
30
37°
28°
1
38°
27°
2
39°
28°
3
38°
27°
4
39°
25°
5
38°
27°
6
39°
26°
7
37°
23°
8
38°
29°
9
39°
30°
10
42°
26°
11
48°
24°
12
34°
22°
13
37°
25°
14
Hist. Avg.
36°
21°
15
Hist. Avg.
35°
20°
16
Hist. Avg.
35°
20°
17
Hist. Avg.
35°
20°
18
Hist. Avg.
34°
20°
19
Hist. Avg.
34°
19°
20
Hist. Avg.
34°
19°
21
Hist. Avg.
34°
19°
22
Hist. Avg.
33°
18°
23
Hist. Avg.
33°
18°
24
Hist. Avg.
33°
18°
25
Hist. Avg.
33°
18°
26
Hist. Avg.
33°
18°
27
Hist. Avg.
33°
17°
28
Hist. Avg.
32°
17°
29
Hist. Avg.
32°
17°
30
Hist. Avg.
32°
17°
31
Hist. Avg.
32°
17°
1
Hist. Avg.
32°
17°
2
Hist. Avg.
32°
17°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
December Weather in Rensselaer
Rensselaer's December 2026 forecast shows daily high temperatures ranging from 34° to 48°, with overnight lows between 22° and 30°. The average high for December is 39° 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 Rensselaer. See also: January | February | March.
