S
M
T
W
T
F
S
29
51°
39°
30
52°
34°
1
51°
33°
2
51°
25°
3
52°
21°
4
37°
20°
5
35°
21°
6
35°
20°
7
36°
22°
8
40°
25°
9
38°
26°
10
34°
23°
11
34°
19°
12
33°
23°
13
33°
19°
14
34°
17°
15
31°
13°
16
30°
14°
17
28°
27°
18
35°
31°
19
44°
30°
20
47°
27°
21
46°
31°
22
44°
34°
23
48°
31°
24
47°
26°
25
43°
24°
26
39°
28°
27
41°
30°
28
44°
32°
29
45°
31°
30
46°
28°
31
45°
25°
1
43°
21°
2
36°
20°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Indianapolis
Indianapolis's December 2026 forecast shows daily high temperatures ranging from 28° to 52°, with overnight lows between 13° and 39°. The average high for December is 41° with an average low of 25°. 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 Indianapolis. See also: January | February | March.
