S
M
T
W
T
F
S
29
45°
26°
30
38°
21°
1
29°
15°
2
28°
16°
3
33°
24°
4
40°
25°
5
33°
23°
6
32°
20°
7
28°
16°
8
26°
20°
9
36°
22°
10
40°
23°
11
39°
23°
12
40°
22°
13
39°
22°
14
31°
20°
15
33°
19°
16
33°
17°
17
32°
12°
18
30°
9°
19
27°
4°
20
21°
4°
21
19°
16°
22
32°
17°
23
33°
10°
24
31°
3°
25
26°
16°
26
27°
18°
27
33°
17°
28
32°
13°
29
31°
11°
30
30°
9°
31
27°
-1°
1
24°
-2°
2
17°
9°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Rock Rapids
Rock Rapids's December 2026 forecast shows daily high temperatures ranging from 17° to 45°, with overnight lows between -2° and 26°. The average high for December is 31° with an average low of 15°. 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 Rock Rapids. See also: January | February | March.
