S
M
T
W
T
F
S
29
41°
20°
30
30°
17°
1
33°
21°
2
42°
22°
3
42°
21°
4
41°
20°
5
38°
19°
6
34°
17°
7
26°
18°
8
40°
19°
9
41°
19°
10
40°
18°
11
41°
19°
12
40°
18°
13
39°
19°
14
36°
16°
15
35°
14°
16
36°
9°
17
33°
7°
18
30°
-2°
19
29°
1°
20
21°
16°
21
35°
10°
22
35°
8°
23
31°
13°
24
34°
11°
25
35°
15°
26
33°
10°
27
36°
-1°
28
32°
-2°
29
21°
1°
30
22°
-4°
31
21°
3°
1
20°
13°
2
30°
14°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Ismay
Ismay's December 2026 forecast shows daily high temperatures ranging from 20° to 42°, with overnight lows between -4° and 22°. The average high for December is 34° with an average low of 13°. 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 Ismay. See also: January | February | March.
