S
M
T
W
T
F
S
29
42°
29°
30
43°
29°
1
42°
28°
2
36°
28°
3
38°
27°
4
34°
20°
5
33°
17°
6
29°
23°
7
32°
26°
8
33°
26°
9
36°
25°
10
35°
26°
11
38°
25°
12
34°
20°
13
32°
18°
14
29°
19°
15
29°
23°
16
34°
24°
17
37°
25°
18
37°
24°
19
38°
23°
20
32°
22°
21
28°
21°
22
29°
21°
23
32°
23°
24
34°
22°
25
27°
11°
26
26°
10°
27
27°
15°
28
29°
20°
29
32°
19°
30
31°
17°
31
31°
15°
1
30°
10°
2
28°
7°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Harrison
Harrison's December 2026 forecast shows daily high temperatures ranging from 26° to 43°, with overnight lows between 7° and 29°. The average high for December is 33° with an average low of 21°. 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 Harrison. See also: January | February | March.
