Northbrook (IL) monthly weather averages

Contents

Average daytime temperature

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

Northbrook average temperature chart (Celsius) Northbrook average temperature chart (Fahrenheit)
Average monthly temperatures in Northbrook (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C -1.5 0.9 7.2 14.1 20.6 26.1 28.2 27.2 23.2 16.8 8.9 1.4
°F 29.3 33.7 45 57.4 69.1 79 82.7 81 73.8 62.2 48 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.

Northbrook monthly rainfall chart (mm) Northbrook monthly rainfall chart (inches)
Average monthly rainfall in Northbrook (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 46 39 68 97 85 97 101 91 84 67 69 62
inches 1.8 1.5 2.7 3.8 3.4 3.8 4 3.6 3.3 2.6 2.7 2.4
Rainy days 12 10 12 13 11 10 10 9 10 9 11 12

Average annual rainfall in Northbrook: 859.233mm (338.3 inches)

Average daily sunshine

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

Northbrook average daily sunshine chart
Average daily sunshine Northbrook
  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 11.1 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.

Northbrook average minimum / maximum temperatures (Celsius) Northbrook average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in Northbrook (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C -10.5 -8.2 -2.3 3.4 8.7 14.2 17.4 16.7 12.5 6.2 0.1 -6.9
Max °C -1.3 1.2 7.5 14.4 20.9 26.4 28.5 27.5 23.5 17.1 9.1 1.7
Min °F 13.1 17.3 28 38.1 47.7 57.6 63.2 62.1 54.5 43.1 32.2 19.7
Max °F 21.4 25.7 36.7 48 58.6 68.5 73.2 71.8 64.4 52.9 40.3 27.3

Sea temperature

The graph below shows the average sea temperature.

Northbrook average sea temperature chart (Celsius) Northbrook average sea temperature chart (Fahrenheit)
Average sea temperature around Northbrook 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.

Northbrook average winspeed by month (km/h) Northbrook average winspeed by month (mph)
Average wind speed in Northbrook (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 13 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.

Northbrook relative humidity averages
Average relative humidity in Northbrook
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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Beta

Current (hourly) weather 15 day forecast

Northbrook weather stats

Northbrook weather statistics
Hottest month: July 28.2°C 82.8°F
Driest month: February 39mm 1.5ins
Sunniest month: July 11.1hrs
Coldest month: January -1.5°C 29.3°F
Wettest month: July 101mm 4ins
Warmest sea: August 21.8°C 71.2°F
Map showing location of Northbrook (42.12753, -87.82895) Northbrook map pin © Google

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