Grand Rapids Weather in August

What's the weather like in Grand Rapids (Michigan) in August 2025?

The climate in Grand Rapids during August can be summarized as warm, humid and a little damp.

August is in the summer in Grand Rapids and is typically the 2nd warmest month of the year. Daytime maximum temperatures average around a muggy 27°C (80°F), whilst at night 14°C (58°F) is normal.

Grand Rapids weather averages (imperial / metric)
Daytime temperature 26.7°C 80.1°F
Nightly temperature 14.3°C 57.7°F
Average temperature 20.5°C 68.9°F
Daily sunshine 9.4 hrs
Avg rainfall 89 mm 3.5 ins
Rainy days 9 days
Sea temperature 21.7°C 71.1°F
Humidity 74%
Windspeed 13.7kph 9 mph

On average August is the 2nd wettest month of the year in Grand Rapids with around 89mm 3.5 inches of rain making it a a little damp time to visit. This rainfall is typically spread over 9 days, although this may vary considerably.

On the flip side this corresponds to an average of 9.4 hours of sunshine per day.

August temperatures in Grand Rapids

Grand Rapids average temperature in August

August rainfall

Grand Rapids average rain in August

August hourly sunshine

Grand Rapids average rain in August

The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Grand Rapids in August 2025.

Other monthly averages

Best places to visit in August

UV index Best time to go?

Beta

Current (hourly) weather 15 day forecast

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
Map showing location of Grand Rapids (42.96336, -85.66809) Grand Rapids map pin © Google

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