S
M
T
W
T
F
S
29
36°
23°
30
37°
24°
1
37°
29°
2
41°
32°
3
38°
34°
4
46°
34°
5
43°
35°
6
46°
34°
7
43°
33°
8
41°
32°
9
39°
30°
10
37°
30°
11
46°
31°
12
47°
25°
13
48°
21°
14
34°
20°
15
32°
23°
16
34°
20°
17
32°
25°
18
37°
30°
19
39°
32°
20
45°
31°
21
45°
30°
22
44°
32°
23
46°
33°
24
48°
26°
25
47°
18°
26
44°
17°
27
30°
24°
28
36°
29°
29
42°
29°
30
43°
32°
31
46°
33°
1
47°
26°
2
47°
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 30° to 48°, with overnight lows between 17° and 35°. The average high for December is 41° with an average low of 28°. 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.
