S
M
T
W
T
F
S
29
40°
22°
30
37°
21°
1
36°
21°
2
36°
26°
3
37°
32°
4
48°
27°
5
42°
26°
6
38°
26°
7
41°
27°
8
42°
29°
9
45°
25°
10
42°
30°
11
44°
33°
12
Hist. Avg.
39°
24°
13
Hist. Avg.
39°
24°
14
Hist. Avg.
38°
23°
15
Hist. Avg.
38°
23°
16
Hist. Avg.
38°
23°
17
Hist. Avg.
38°
22°
18
Hist. Avg.
37°
22°
19
Hist. Avg.
37°
22°
20
Hist. Avg.
37°
22°
21
Hist. Avg.
36°
21°
22
Hist. Avg.
36°
21°
23
Hist. Avg.
36°
21°
24
Hist. Avg.
36°
20°
25
Hist. Avg.
36°
20°
26
Hist. Avg.
35°
20°
27
Hist. Avg.
35°
20°
28
Hist. Avg.
35°
20°
29
Hist. Avg.
35°
19°
30
Hist. Avg.
34°
19°
31
Hist. Avg.
34°
19°
1
Hist. Avg.
34°
18°
2
Hist. Avg.
34°
18°
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 36° to 48°, with overnight lows between 21° and 33°. The average high for December is 41° with an average low of 27°. 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.
