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
    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.

    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

    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 8.4 6.9 4.4 3.7
  • Day / night temperatures

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

    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.

    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.

    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.

    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

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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