Mount Prospect (IL) monthly weather averages

Average daytime temperature

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

Mount Prospect average temperature chart (Celsius) Mount Prospect average temperature chart (Fahrenheit)
Average monthly temperatures in Mount Prospect (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C -2 0.7 7.2 14.2 20.8 26.2 28.3 27.2 23.3 16.9 8.8 1.1
°F 28.5 33.2 44.9 57.5 69.4 79.1 82.9 81 73.9 62.4 47.8 34.1

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.

Mount Prospect monthly rainfall chart (mm) Mount Prospect monthly rainfall chart (inches)
Average monthly rainfall in Mount Prospect (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 45 37 71 101 86 98 104 93 88 64 69 66
inches 1.8 1.5 2.8 4 3.4 3.9 4.1 3.6 3.5 2.5 2.7 2.6
Rainy days 11 9 12 13 11 10 10 9 10 9 11 12

Average annual rainfall in Mount Prospect: 874.666mm (344.4 inches)

Average daily sunshine

The bar chart below shows the average daily sunshine hours in Mount Prospect

Mount Prospect average daily sunshine chart
Average daily sunshine Mount Prospect
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 4.9 5.4 6.5 7.7 9.7 11.1 11 9.8 8.1 6.7 4.2 3.8

Day / night temperatures

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

Mount Prospect average minimum / maximum temperatures (Celsius) Mount Prospect average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in Mount Prospect (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C -10.9 -8.3 -2.2 3.4 8.8 14.2 17.3 16.5 12.3 5.9 -0.2 -7.2
Max °C -1.8 0.9 7.4 14.5 21.1 26.5 28.6 27.5 23.6 17.2 9 1.4
Min °F 12.5 17.1 28 38 47.8 57.5 63.1 61.7 54.1 42.5 31.6 19.1
Max °F 20.7 25.3 36.7 48 58.8 68.5 73.2 71.6 64.2 52.7 39.9 26.8

Sea temperature

The graph below shows the average sea temperature.

Mount Prospect average sea temperature chart (Celsius) Mount Prospect average sea temperature chart (Fahrenheit)
Average sea temperature around Mount Prospect in degrees centigrade and fahrenheit
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 3.6 2.8 2.7 3.6 6 12.1 19.3 21.8 19.6 14 8.9 5.3
°F 38.6 37.1 36.8 38.4 42.8 53.8 66.8 71.3 67.3 57.2 48 41.6

Wind speed

The graph below shows the average wind speed.

Mount Prospect average winspeed by month (km/h) Mount Prospect average winspeed by month (mph)
Average wind speed in Mount Prospect (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 16 17 19 19
mph 12 12 13 13 11 10 9 9 10 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.

Mount Prospect relative humidity averages
Average relative humidity in Mount Prospect
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
73% 72% 70% 66% 65% 67% 70% 72% 72% 70% 74% 76%

Other monthly averages

UV index Best time to go?

Mount Prospect weather stats

Mount Prospect weather statistics
Hottest month: July 28.3°C 82.9°F
Driest month: February 37mm 1.5ins
Sunniest month: July 11hrs
Coldest month: January -2°C 28.4°F
Wettest month: July 104mm 4.1ins
Warmest sea: August 21.8°C 71.2°F
Map showing location of Mount Prospect (42.06642, -87.93729) Mount Prospect map pin © Google

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