Chicago (IL) monthly weather averages

  • Average daytime temperature

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

    Chicago average temperature chart
    Average monthly temperatures in Chicago (degrees centigrade and fahrenheit)
      Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
    °C -1.4 1 7.4 14.3 20.8 26.3 28.3 27.3 23.3 16.9 8.8 1.5
    °F 29.5 33.8 45.4 57.8 69.4 79.3 83 81.1 74 62.4 47.8 34.6

    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 Chicago (mm and inches)
      Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
    mm 44 38 68 96 84 96 100 97 87 68 72 62
    inches 1.7 1.5 2.7 3.8 3.3 3.8 3.9 3.8 3.4 2.7 2.8 2.4
    Rainy days 12 10 13 13 11 10 10 9 9 9 11 12
  • Average daily sunshine

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

    Average daily sunshine Chicago
      Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
    Hrs sunshine 4.8 5.4 6.5 7.8 9.7 11.1 11 9.9 8.2 6.7 4.2 3.8
  • Day / night temperatures

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

    Maximum and minimum daily temperatures in Chicago (degrees centigrade and fahrenheit)
      Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
    Min °C -10.2 -8 -2.1 3.4 8.8 14.2 17.2 16.5 12.4 6.1 0.2 -6.7
    Max °C -1.2 1.2 7.7 14.6 21.1 26.6 28.6 27.6 23.6 17.2 9 1.7
    Min °F 13.6 17.6 28.3 38.1 47.8 57.6 63 61.6 54.3 42.9 32.4 20
    Max °F 21.7 25.9 37 48.2 58.8 68.7 73.2 71.6 64.4 52.9 40.3 27.5
  • Sea temperature

    The graph below shows the average sea temperature.

    Average sea temperature around Chicago in degrees centigrade and fahrenheit
      Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
    °C 4.4 3.6 3.5 4.5 6.9 12.5 19.3 21.8 19.7 14.3 9.4 6
    °F 39.9 38.5 38.4 40.1 44.4 54.6 66.7 71.3 67.5 57.7 48.9 42.9
  • Wind speed

    The graph below shows the average wind speed.

    Average wind speed in Chicago (mph and kmh)
      Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
    km/h 20 19 21 21 18 16 14 14 15 17 19 19
    mph 13 12 13 13 11 10 9 9 9 11 12 12

    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 Chicago
    Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
    73% 73% 70% 66% 65% 67% 70% 72% 72% 70% 74% 77%

Other monthly averages

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Chicago weather stats

Chicago weather statistics
Hottest month: July 28.3°C 82.9°F
Driest month: February 38mm 1.5ins
Sunniest month: July 11hrs
Coldest month: January -1.4°C 29.5°F
Wettest month: July 100mm 3.9ins
Warmest sea: August 21.8°C 71.2°F
Map showing location of Chicago (41.85003, -87.65005)

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