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August Weather in Forest Park, United States

Last updated: June 24, 2025

In August, the average temperature in Forest Park, United States is a warm 27°C (81°F). You can expect a comfortable minimum of 17°C (62°F), with the mercury soaring up to a sizzling 40°C (103°F) on the hottest days. During this month, precipitation averages around 67 mm (2.6 in) spread over 9 days, while the average humidity sits at a notable 72%. Enjoy the warmth!

August Temperature in Forest Park

In August in Forest Park, the average temperature is 27°C (81°F). Maximums can reach 40°C (103°F), and minimums can be as low as 17°C (62°F). Be prepared for warm weather, but bring a light jacket for cooler evenings.

August Weather in Forest Park: Daily Temperature Highs, Lows, and Averages

The chart illustrates August temperature patterns in Forest Park, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Forest Park, August typically has an average temperature of 27°C (81°F), with highs reaching up to 40°C (103°F) and lows dropping to around 17°C (62°F).
JanFebMarAprMayJunJulAugSepOctNovDec394154596979838175625044
Data source: Temperature data for Forest Park 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 Forest Park

In Forest Park in August, the total precipitation amount is 67 mm (2.6 in), occurring over a span of 9 days.

August Precipitation Trends in Forest Park

The chart displays monthly precipitation patterns in Forest Park, 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 Forest Park, August typically receives around 67 mm (2.6 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec474684124137966567851083036
Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.
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August Humidity in Forest Park

In Forest Park in August humidity is 72%. With an average temperature of 27°C (81°F), this humidity feels like walking through a warm, damp blanket, making travel a bit uncomfortable as you navigate through the thick, sticky air.

August Average Humidity in Forest Park

This chart illustrates the average monthly humidity levels in Forest Park, 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 Forest Park is approximately 72%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec76%76%70%72%82%82%80%72%64%71%81%84%
Data source: Humidity data for August generated using information from the Copernicus Climate Change Service.

August UV Index in Forest Park

In Forest Park in August, the maximum UV index reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, you can check the Hourly UV Index in Forest Park.

Maximum UV Index Levels in Forest Park for August

The chart shows the monthly maximum UV Index (UVI) for Forest Park 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 Forest Park typically reaches 11, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec46810101111119754
Data source: Forest Park 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 Forest Park Compares to Other Months

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

This table compares monthly weather conditions in Forest Park, showing how August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather4°C (39°F)47 mm (1.8 inches)76%moderate
February Weather5°C (41°F)46 mm (1.8 inches)76%high
March Weather12°C (54°F)84 mm (3.3 inches)70%very high
April Weather15°C (59°F)124 mm (4.9 inches)72%very high
May Weather21°C (70°F)137 mm (5.4 inches)82%very high
June Weather26°C (79°F)96 mm (3.8 inches)82%extreme
July Weather28°C (83°F)65 mm (2.6 inches)80%extreme
August Weather27°C (81°F)67 mm (2.6 inches)72%extreme
September Weather24°C (76°F)85 mm (3.3 inches)64%very high
October Weather17°C (62°F)108 mm (4.3 inches)71%high
November Weather10°C (50°F)30 mm (1.2 inches)81%moderate
December Weather7°C (44°F)36 mm (1.4 inches)84%moderate

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