S
M
T
W
T
F
S
29
40°
26°
30
44°
29°
1
43°
28°
2
42°
28°
3
44°
26°
4
42°
25°
5
42°
25°
6
40°
26°
7
43°
24°
8
36°
22°
9
33°
23°
10
34°
20°
11
33°
22°
12
33°
20°
13
34°
15°
14
35°
11°
15
30°
12°
16
28°
14°
17
29°
13°
18
28°
19°
19
33°
18°
20
37°
16°
21
32°
13°
22
29°
12°
23
28°
7°
24
30°
15°
25
29°
10°
26
33°
4°
27
26°
5°
28
21°
5°
29
26°
3°
30
24°
7°
31
26°
17°
1
38°
12°
2
36°
5°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Cornish Flat
Cornish Flat's December 2026 forecast shows daily high temperatures ranging from 21° to 44°, with overnight lows between 3° and 29°. The average high for December is 34° with an average low of 16°. 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 Cornish Flat. See also: January | February | March.
