Average data for 10 years
1 September
Sunday
+27°
+21°
2 September
Monday
+27°
+22°
3 September
Tuesday
+27°
+22°
4 September
Wednesday
+26°
+19°
5 September
Thursday
+24°
+20°
6 September
Friday
+25°
+19°
7 September
Saturday
+25°
+20°
8 September
Sunday
+24°
+19°
9 September
Monday
+25°
+19°
10 September
Tuesday
+22°
+19°
11 September
today
+23°
+17°
12 September
tomorrow
+23°
+17°
13 September
Friday
+24°
+17°
14 September
Saturday
+23°
+18°
15 September
Sunday
+22°
+18°
16 September
Monday
+23°
+16°
17 September
Tuesday
+24°
+18°
18 September
Wednesday
+23°
+19°
19 September
Thursday
+24°
+17°
20 September
Friday
+25°
+19°
21 September
Saturday
+24°
+19°
22 September
Sunday
+24°
+18°
23 September
Monday
+24°
+18°
24 September
Tuesday
+22°
+18°
25 September
Wednesday
+22°
+18°
26 September
Thursday
+21°
+18°
27 September
Friday
+22°
+17°
28 September
Saturday
+21°
+17°
29 September
Sunday
+19°
+15°
30 September
Monday
+18°
+13°
In September, the weather in Indianapolis is typically warm. Average daily high temperature in September is about 23 degrees above zero. On average, Indianapolis has 18 sunny, 7 partly cloudy, and 5 rainy days in September. The rains are usually light. September as well as August is considered the most comfortable time to visit Indianapolis.