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August Weather in Grand Rapids, United States

Last updated: June 24, 2025

In August, the average temperature in Grand Rapids, United States is a pleasant 23°C (74°F). Visitors can expect temperatures to vary, with lows of 9°C (49°F) and highs reaching 34°C (94°F). Additionally, precipitation usually totals around 88 mm (3.5 in) over 10 days, paired with an average humidity of 78%.

August Temperature in Grand Rapids

In August in Grand Rapids, the average temperature is 23°C (74°F). Maximum temperatures can reach 34°C (94°F), while minimums can drop as low as 9°C (49°F). Be prepared for both warm days and cooler nights when planning your travels.

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 23°C (74°F), with highs reaching up to 34°C (94°F) and lows dropping to around 9°C (49°F).
JanFebMarAprMayJunJulAugSepOctNovDec283039496272767368564134
Data source: Temperature data for Grand Rapids generated using information from the Copernicus Climate Change Service.
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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 88 mm (3.5 in) spread over a duration 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 88 mm (3.5 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec697284931451061128859928356
Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.
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August Humidity in Grand Rapids

In Grand Rapids in August humidity is 78%. With an average temperature of 23°C (74°F), this humidity feels like a warm, enveloping embrace, making travel somewhat stifling and prompting frequent breaks to hydrate and seek shade.

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 78%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%87%87%88%81%82%81%78%78%82%89%86%
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 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check 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 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec356910101098642
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-2°C (29°F)69 mm (2.7 inches)88%moderate
February Weather-1°C (30°F)72 mm (2.8 inches)87%moderate
March Weather4°C (40°F)84 mm (3.3 inches)87%high
April Weather10°C (49°F)93 mm (3.7 inches)87%very high
May Weather16°C (62°F)145 mm (5.7 inches)81%very high
June Weather22°C (72°F)106 mm (4.2 inches)82%very high
July Weather24°C (76°F)112 mm (4.4 inches)81%very high
August Weather23°C (74°F)88 mm (3.5 inches)78%very high
September Weather20°C (68°F)59 mm (2.3 inches)78%very high
October Weather14°C (57°F)92 mm (3.6 inches)82%high
November Weather5°C (41°F)83 mm (3.3 inches)89%moderate
December Weather1°C (35°F)56 mm (2.2 inches)86%low

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