nomadseason

August Weather in Grand Rapids, United States

Last updated: June 24, 2025

In August, the average temperature in Grand Rapids, United States hovers around 19°C (67°F), with a minimum of 8°C (46°F) and a pleasant maximum reaching 31°C (88°F). Expect about 86 mm (3.4 in) of precipitation over 10 days, and keep in mind the average humidity level is a comfortable 77%.

August Temperature in Grand Rapids

In August in Grand Rapids, the average temperature is 19°C (67°F). Maximum temperatures can reach 31°C (88°F), while the minimum can drop as low as 8°C (46°F). This diverse temperature range makes it essential to pack layers for your trip.

August Weather in Grand Rapids: Daily Temperature Highs, Lows, and Averages

The chart illustrates August temperature patterns in Grand Rapids, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Grand Rapids, August typically has an average temperature of 19°C (67°F), with highs reaching up to 31°C (88°F) and lows dropping to around 8°C (46°F).
JanFebMarAprMayJunJulAugSepOctNovDec101027375365706659442817
Data source: Temperature data for Grand Rapids generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

August Precipitation in Grand Rapids

In Grand Rapids in August, the precipitation amount is 86 mm (3.4 in) over the course of 10 days.

August Precipitation Trends in Grand Rapids

The chart displays monthly precipitation patterns in Grand Rapids, with values for each month alongside August’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how August’s conditions compare to those of other months. In Grand Rapids, August typically receives around 86 mm (3.4 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec222634616085107861051033352
Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

August Humidity in Grand Rapids

In Grand Rapids in August, humidity is 77%. With an average temperature of 19°C (67°F), this humidity feels like a warm embrace, making travel slightly more challenging as the air clings to your skin, turning every step into a leisurely stroll through a sauna.

August Average Humidity in Grand Rapids

This chart illustrates the average monthly humidity levels in Grand Rapids, with August’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In August, average humidity in Grand Rapids is approximately 77%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec92%93%88%83%76%76%76%77%77%82%88%89%
Data source: Humidity data for August generated using information from the Copernicus Climate Change Service.

August UV Index in Grand Rapids

In Grand Rapids in August, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Grand Rapids.

Maximum UV Index Levels in Grand Rapids for August

The chart shows the monthly maximum UV Index (UVI) for Grand Rapids in August, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In August, the maximum UV index in Grand Rapids typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec235789987532
Data source: Grand Rapids August UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

How August Weather in Grand Rapids Compares to Other Months

Weather in Grand Rapids varies notably across the year, with each month offering distinct climate conditions. This page compares August’s weather to other months in Grand Rapids, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Grand Rapids, showing how August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-12°C (11°F)22 mm (0.8 inches)92%low
February Weather-12°C (11°F)26 mm (1.0 inches)93%moderate
March Weather-3°C (27°F)34 mm (1.3 inches)88%moderate
April Weather3°C (38°F)61 mm (2.4 inches)83%high
May Weather12°C (53°F)60 mm (2.4 inches)76%very high
June Weather18°C (65°F)85 mm (3.4 inches)76%very high
July Weather21°C (70°F)107 mm (4.2 inches)76%very high
August Weather19°C (67°F)86 mm (3.4 inches)77%very high
September Weather15°C (59°F)105 mm (4.1 inches)77%high
October Weather7°C (44°F)103 mm (4.1 inches)82%moderate
November Weather-2°C (28°F)33 mm (1.3 inches)87%moderate
December Weather-8°C (18°F)52 mm (2.0 inches)89%low

Compare Grand Rapids's Climate with Cities Worldwide