S
M
T
W
T
F
S
29
43°
31°
30
44°
32°
1
45°
32°
2
44°
32°
3
46°
30°
4
41°
27°
5
43°
29°
6
44°
30°
7
42°
28°
8
35°
27°
9
34°
27°
10
34°
28°
11
35°
28°
12
35°
25°
13
34°
25°
14
33°
19°
15
33°
19°
16
34°
20°
17
33°
22°
18
34°
25°
19
36°
24°
20
36°
17°
21
34°
19°
22
32°
21°
23
30°
14°
24
33°
18°
25
27°
16°
26
29°
11°
27
28°
7°
28
24°
7°
29
26°
2°
30
25°
12°
31
26°
19°
1
37°
12°
2
33°
10°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Prospect
Prospect's December 2026 forecast shows daily high temperatures ranging from 24° to 46°, with overnight lows between 2° and 32°. The average high for December is 35° 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 Prospect. See also: January | February | March.
