S
M
T
W
T
F
S
29
47°
36°
30
48°
35°
1
47°
34°
2
47°
33°
3
44°
33°
4
46°
32°
5
45°
32°
6
39°
29°
7
36°
24°
8
32°
21°
9
32°
24°
10
38°
28°
11
39°
30°
12
41°
29°
13
38°
29°
14
32°
24°
15
35°
25°
16
39°
26°
17
40°
27°
18
34°
22°
19
35°
20°
20
32°
15°
21
32°
16°
22
28°
20°
23
35°
25°
24
34°
22°
25
35°
13°
26
32°
12°
27
27°
10°
28
27°
10°
29
28°
13°
30
27°
20°
31
28°
15°
1
33°
11°
2
26°
10°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Harvey
Harvey's December 2026 forecast shows daily high temperatures ranging from 26° to 48°, with overnight lows between 10° and 36°. The average high for December is 36° with an average low of 23°. 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 Harvey. See also: January | February | March.