Naperville (IL) monthly weather averages

Contents

Average daytime temperature

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

Naperville average temperature chart (Celsius) Naperville average temperature chart (Fahrenheit)
Average monthly temperatures in Naperville (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C -2 0.6 7.5 14.9 21.3 26.7 28.6 27.4 23.6 17.2 8.8 0.9
°F 28.4 33.1 45.4 58.8 70.4 80.1 83.5 81.4 74.5 63 47.8 33.6

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.

Naperville monthly rainfall chart (mm) Naperville monthly rainfall chart (inches)
Average monthly rainfall in Naperville (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 42 36 69 101 91 103 105 96 92 65 71 65
inches 1.7 1.4 2.7 4 3.6 4.1 4.1 3.8 3.6 2.5 2.8 2.5
Rainy days 11 9 12 12 11 10 10 9 9 9 11 12

Average annual rainfall in Naperville: 889.267mm (350.1 inches)

Average daily sunshine

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

Naperville average daily sunshine chart
Average daily sunshine Naperville
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 5 5.5 6.5 7.7 9.6 11.1 11 9.8 8.2 6.8 4.3 3.9

Day / night temperatures

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

Naperville average minimum / maximum temperatures (Celsius) Naperville average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in Naperville (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C -11.2 -8.9 -2.3 3.5 8.8 14.2 16.9 15.9 11.7 5.3 -0.6 -7.5
Max °C -1.8 0.9 7.7 15.2 21.7 27 28.9 27.7 23.9 17.5 9 1.1
Min °F 11.8 16.1 27.9 38.2 47.8 57.6 62.4 60.6 53.1 41.5 30.9 18.5
Max °F 20.3 24.8 36.9 48.7 59.4 69.1 73.2 71.2 64 52.5 39.6 26.2

Sea temperature

The graph below shows the average sea temperature.

Naperville average sea temperature chart (Celsius) Naperville average sea temperature chart (Fahrenheit)
Average sea temperature around Naperville in degrees centigrade and fahrenheit
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 5.7 5 5.1 6 8.1 12.5 18.1 21.2 19.4 14.3 10 7.2
°F 42.2 41.1 41.1 42.8 46.6 54.5 64.6 70.2 66.8 57.7 50.1 45

Wind speed

The graph below shows the average wind speed.

Naperville average winspeed by month (km/h) Naperville average winspeed by month (mph)
Average wind speed in Naperville (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 18 19
mph 12 12 13 13 11 10 9 9 9 11 11 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.

Naperville relative humidity averages
Average relative humidity in Naperville
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
73% 73% 70% 65% 65% 66% 70% 72% 72% 70% 74% 77%

Other monthly averages

UV index Best time to go?

Beta

Current (hourly) weather 15 day forecast

Naperville weather stats

Naperville weather statistics
Hottest month: July 28.6°C 83.5°F
Driest month: February 36mm 1.4ins
Sunniest month: July 11hrs
Coldest month: January -2°C 28.4°F
Wettest month: July 105mm 4.1ins
Warmest sea: August 21.2°C 70.2°F
Map showing location of Naperville (41.78586, -88.14729) Naperville map pin © Google

Locations nearby

Top United States locations