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