August Weather in Wheaton, United States

Last updated: June 24, 2025

In August, the average temperature in Wheaton, United States is a pleasant 21°C (70°F). Expect a range, with minimums dipping to 8°C (46°F) and maximums soaring up to 34°C (93°F). This month, prepare for 120 mm (4.7 in) of precipitation spread over 11 days, contributing to an average humidity of 83%.

August Temperature in Wheaton

In August in Wheaton, the average temperature is 21°C (70°F), with maximums reaching up to 34°C (93°F) and minimums dropping as low as 8°C (46°F). This pleasant climate makes Wheaton an ideal destination for travelers seeking both warmth and the opportunity to enjoy cooler evenings.

August Weather in Wheaton: Daily Temperature Highs, Lows, and Averages

The chart illustrates August temperature patterns in Wheaton, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Wheaton, August typically has an average temperature of 21°C (70°F), with highs reaching up to 34°C (93°F) and lows dropping to around 8°C (46°F).

Data source: Temperature data for Wheaton generated using information from the Copernicus Climate Change Service.

August Precipitation in Wheaton

In Wheaton in August, the precipitation amount is 120 mm (4.7 in) during a span of 11 days.

August Precipitation Trends in Wheaton

The chart displays monthly precipitation patterns in Wheaton, 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 Wheaton, August typically receives around 120 mm (4.7 inches) of precipitation spread over approximately 11 days.

Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

August Humidity in Wheaton

In Wheaton in August humidity is 83%. With an average temperature of 21°C (70°F), this humidity feels like you’re enveloped in a warm, tropical embrace, making it essential to stay hydrated and take breaks during your travels.

August Average Humidity in Wheaton

This chart illustrates the average monthly humidity levels in Wheaton, 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 Wheaton is approximately 83%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for August generated using information from the Copernicus Climate Change Service.

August UV Index in Wheaton

In Wheaton 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 Wheaton.

Maximum UV Index Levels in Wheaton for August

The chart shows the monthly maximum UV Index (UVI) for Wheaton 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 Wheaton typically reaches 9, which falls under the very high exposure category.

Data source: Wheaton 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 Wheaton Compares to Other Months

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

This table compares monthly weather conditions in Wheaton, showing how August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-10°C (14°F)	19 mm (0.7 inches)	85%	moderate
February Weather	-10°C (14°F)	18 mm (0.7 inches)	89%	moderate
March Weather	-1°C (31°F)	37 mm (1.5 inches)	81%	high
April Weather	5°C (41°F)	57 mm (2.3 inches)	82%	high
May Weather	14°C (58°F)	80 mm (3.2 inches)	76%	very high
June Weather	22°C (71°F)	79 mm (3.1 inches)	81%	very high
July Weather	23°C (74°F)	87 mm (3.4 inches)	82%	very high
August Weather	21°C (70°F)	120 mm (4.7 inches)	83%	very high
September Weather	17°C (63°F)	78 mm (3.1 inches)	82%	high
October Weather	8°C (47°F)	79 mm (3.1 inches)	82%	moderate
November Weather	0°C (32°F)	23 mm (0.9 inches)	87%	moderate
December Weather	-5°C (22°F)	36 mm (1.4 inches)	84%	low