Indianapolis (IN) monthly weather averages

Average daytime temperature

The bar chart below shows the average monthly peak daytime temperatures at Indianapolis

Indianapolis average temperature chart (Celsius) Indianapolis average temperature chart (Fahrenheit)
Average monthly temperatures in Indianapolis (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 0.7 3.3 10.1 17 22.9 27.9 29.6 28.5 25.2 18.6 10.9 3.5
°F 33.3 37.9 50.2 62.6 73.2 82.1 85.2 83.3 77.4 65.5 51.6 38.3

Please note: these are the average peak daytime temperatures (usually around mid-afternoon) so do not show daytime / night highs and lows. To see the daily range of temperatures have a look at the temperature max / min chart below.

Average rainfall & rainy days

The graph below shows the average rainfall and number of rainy days per month.

Indianapolis monthly rainfall chart (mm) Indianapolis monthly rainfall chart (inches)
Average monthly rainfall in Indianapolis (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 61 61 92 99 105 91 119 93 75 70 86 82
inches 2.4 2.4 3.6 3.9 4.1 3.6 4.7 3.6 2.9 2.7 3.4 3.2
Rainy days 11 10 13 12 11 9 10 9 8 9 10 13

Average daily sunshine

The bar chart below shows the average daily sunshine hours in Indianapolis

Indianapolis average daily sunshine chart
Average daily sunshine Indianapolis
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 4.8 5.6 6.3 7.8 9.2 10.4 10.3 9.6 8.5 6.9 4.4 3.7

Day / night temperatures

The graph below shows the daily range of temperatures for each month.

Indianapolis average minimum / maximum temperatures (Celsius) Indianapolis average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in Indianapolis (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C -8.6 -6.7 -0.6 4.9 10.6 15.7 18 16.6 12.7 6.1 1.1 -5.1
Max °C 1 3.5 10.4 17.3 23.2 28.2 29.9 28.8 25.5 18.9 11.2 3.7
Min °F 16.6 19.9 31 40.8 51.1 60.2 64.3 61.9 54.9 43 33.9 22.8
Max °F 25.2 29.1 40.8 52 62.4 71.4 75 72.9 66.4 54.5 43 30.7

Sea temperature

The graph below shows the average sea temperature.

Indianapolis average sea temperature chart (Celsius) Indianapolis average sea temperature chart (Fahrenheit)
Average sea temperature around Indianapolis in degrees centigrade and fahrenheit
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 7.4 6.6 6.7 8 10.9 16.2 21.7 23.6 21.7 16.8 12.2 9.1
°F 45.2 43.9 44.1 46.5 51.7 61.1 71.1 74.5 71 62.2 54 48.3

Wind speed

The graph below shows the average wind speed.

Indianapolis average winspeed by month (km/h) Indianapolis average winspeed by month (mph)
Average wind speed in Indianapolis (mph and kmh)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
km/h 18 18 19 18 16 14 13 12 13 15 17 18
mph 11 11 12 11 10 9 8 7 8 9 11 11

A monthly average windspeed of over 16km/h or 10mph suggests a location is fairly windy.

Relative humidity

The graph below shows the average relative humidity.

Indianapolis relative humidity averages
Average relative humidity in Indianapolis
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
75% 73% 70% 66% 67% 68% 72% 74% 74% 72% 75% 77%

Other monthly averages

UV index Best time to go?

Indianapolis weather stats

Indianapolis weather statistics
Hottest month: July 29.6°C 85.3°F
Driest month: January 61mm 2.4ins
Sunniest month: July 10.3hrs
Coldest month: January 0.7°C 33.3°F
Wettest month: July 119mm 4.7ins
Warmest sea: August 23.6°C 74.5°F
Map showing location of Indianapolis (39.76838, -86.15804)

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