Crystal Lake (IL) monthly weather averages

Contents

Average daytime temperature

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

Crystal Lake average temperature chart (Celsius) Crystal Lake average temperature chart (Fahrenheit)
Average monthly temperatures in Crystal Lake (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C -2.7 -0.1 6.4 14 20.5 26.1 28.2 27.1 23 16.5 8.1 0.2
°F 27.1 31.8 43.5 57.1 69 79.1 82.8 80.7 73.4 61.7 46.6 32.3

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.

Crystal Lake monthly rainfall chart (mm) Crystal Lake monthly rainfall chart (inches)
Average monthly rainfall in Crystal Lake (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 40 32 64 94 85 102 101 99 92 64 67 57
inches 1.6 1.3 2.5 3.7 3.3 4 4 3.9 3.6 2.5 2.6 2.3
Rainy days 11 9 12 12 11 10 10 10 10 9 11 11

Average annual rainfall in Crystal Lake: 851.1mm (335.1 inches)

Average daily sunshine

The bar chart below shows the average daily sunshine hours in Crystal Lake

Crystal Lake average daily sunshine chart
Average daily sunshine Crystal Lake
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 5 5.6 6.5 7.6 9.6 10.9 10.9 9.7 8 6.6 4.2 3.9

Day / night temperatures

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

Crystal Lake average minimum / maximum temperatures (Celsius) Crystal Lake average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in Crystal Lake (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C -12.3 -9.9 -3.5 2.6 8 13.6 16.5 15.5 11.1 4.8 -1.4 -8.6
Max °C -2.5 0.1 6.7 14.3 20.9 26.5 28.5 27.4 23.3 16.8 8.4 0.4
Min °F 9.9 14.2 25.8 36.6 46.3 56.4 61.7 59.8 52 40.6 29.6 16.5
Max °F 18.7 23.2 34.9 47.1 57.9 68 72.5 70.5 63 51.4 38.3 24.6

Sea temperature

The graph below shows the average sea temperature.

Crystal Lake average sea temperature chart (Celsius) Crystal Lake average sea temperature chart (Fahrenheit)
Average sea temperature around Crystal Lake in degrees centigrade and fahrenheit
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 4.3 3.6 3.5 4.3 6.5 11.7 18.2 21.2 19.2 13.8 9.1 5.9
°F 39.8 38.5 38.3 39.8 43.7 53.1 64.8 70.2 66.5 56.8 48.4 42.6

Wind speed

The graph below shows the average wind speed.

Crystal Lake average winspeed by month (km/h) Crystal Lake average winspeed by month (mph)
Average wind speed in Crystal Lake (mph and kmh)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
km/h 20 19 21 21 18 16 15 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.

Crystal Lake relative humidity averages
Average relative humidity in Crystal Lake
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
73% 73% 71% 66% 66% 67% 70% 73% 73% 71% 74% 77%

Other monthly averages

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Beta

Current (hourly) weather 15 day forecast

Crystal Lake weather stats

Crystal Lake weather statistics
Hottest month: July 28.2°C 82.8°F
Driest month: February 32mm 1.3ins
Sunniest month: July 10.9hrs
Coldest month: January -2.7°C 27.1°F
Wettest month: June 102mm 4ins
Warmest sea: August 21.2°C 70.2°F
Map showing location of Crystal Lake (42.24113, -88.3162) Crystal Lake map pin © Google

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