Grand Rapids (MI) monthly weather averages

Average daytime temperature

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

Grand Rapids average temperature chart (Celsius) Grand Rapids average temperature chart (Fahrenheit)
Average monthly temperatures in Grand Rapids (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C -1.6 -0.1 6.2 13.8 20.5 25.3 27.6 26.4 22.2 15.5 7.9 0.9
°F 29.1 31.9 43.1 56.8 68.9 77.5 81.7 79.5 71.9 60 46.3 33.7

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.

Grand Rapids monthly rainfall chart (mm) Grand Rapids monthly rainfall chart (inches)
Average monthly rainfall in Grand Rapids (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 56 39 64 84 77 87 78 89 98 74 82 72
inches 2.2 1.5 2.5 3.3 3 3.4 3.1 3.5 3.8 2.9 3.2 2.8
Rainy days 17 12 13 13 10 10 9 9 10 11 13 17

Average annual rainfall in Grand Rapids: 857.567mm (337.6 inches)

Average daily sunshine

The bar chart below shows the average daily sunshine hours in Grand Rapids

Grand Rapids average daily sunshine chart
Average daily sunshine Grand Rapids
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 3.5 4.8 6 7.6 9.1 10.5 10.5 9.4 7.5 5.6 3.2 2.5

Day / night temperatures

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

Grand Rapids average minimum / maximum temperatures (Celsius) Grand Rapids average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in Grand Rapids (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C -9.4 -9 -3.6 2 7.4 12.4 15.3 14.3 10.2 4.4 -0.4 -6.1
Max °C -1.4 0.1 6.4 14.1 20.8 25.6 27.9 26.7 22.5 15.8 8.2 1.1
Min °F 15.1 15.9 25.5 35.5 45.3 54.3 59.5 57.7 50.3 39.9 31.4 21
Max °F 22.3 24.1 34.5 46.4 57.4 66.2 70.9 68.9 61.3 50.2 39 27.5

Sea temperature

The graph below shows the average sea temperature.

Grand Rapids average sea temperature chart (Celsius) Grand Rapids average sea temperature chart (Fahrenheit)
Average sea temperature around Grand Rapids in degrees centigrade and fahrenheit
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 3.7 2.9 2.7 3.8 6.3 12.3 19.2 21.7 19.5 13.9 8.8 5.3
°F 38.6 37.2 36.9 38.8 43.4 54.1 66.6 71.1 67.1 57.1 47.9 41.6

Wind speed

The graph below shows the average wind speed.

Grand Rapids average winspeed by month (km/h) Grand Rapids average winspeed by month (mph)
Average wind speed in Grand Rapids (mph and kmh)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
km/h 20 19 20 19 17 16 14 14 15 17 19 19
mph 13 12 12 12 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.

Grand Rapids relative humidity averages
Average relative humidity in Grand Rapids
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
77% 75% 71% 67% 65% 68% 70% 74% 76% 75% 77% 80%

Other monthly averages

UV index Best time to go?

Grand Rapids weather stats

Grand Rapids weather statistics
Hottest month: July 27.6°C 81.7°F
Driest month: February 39mm 1.5ins
Sunniest month: July 10.5hrs
Coldest month: January -1.6°C 29.1°F
Wettest month: September 98mm 3.9ins
Warmest sea: August 21.7°C 71.1°F
Map showing location of Grand Rapids (42.96336, -85.66809) Grand Rapids map pin © Google

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