May Weather in Wheaton, United States

Last updated: June 24, 2025

In May, the average temperature in Wheaton, United States is a pleasant 19°C (66°F). While you might enjoy sunny days with highs reaching up to 33°C (91°F), be prepared for cooler moments as temperatures can dip as low as 3°C (38°F). With an average humidity of 83%, it's essential to stay hydrated. Additionally, expect 172 mm (6.8 in) of precipitation spread over 13 days, adding a refreshing touch to the month.

May Temperature in Wheaton

In May in Wheaton, the average temperature is 19°C (66°F). Maximum temperatures can reach 33°C (91°F), while minimums can drop as low as 3°C (38°F). This climate makes Wheaton an ideal destination for travelers seeking a mix of warm and cool experiences.

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

The chart illustrates May 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, May typically has an average temperature of 19°C (66°F), with highs reaching up to 33°C (91°F) and lows dropping to around 3°C (38°F).

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

May Precipitation in Wheaton

In Wheaton in May, the precipitation amount is 172 mm (6.8 in), which occurs over the course of 13 days.

May Precipitation Trends in Wheaton

The chart displays monthly precipitation patterns in Wheaton, with values for each month alongside May’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how May’s conditions compare to those of other months. In Wheaton, May typically receives around 172 mm (6.8 inches) of precipitation spread over approximately 13 days.

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

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Millimeters (mm) Inches (in)

May Humidity in Wheaton

In Wheaton in May, humidity is 83%. With an average temperature of 19°C (66°F), this humidity feels like a heavy blanket wrapping around you, making travel feel more sluggish and muggy, yet there's a refreshing coolness in the air that invites you to explore.

May Average Humidity in Wheaton

This chart illustrates the average monthly humidity levels in Wheaton, with May’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In May, average humidity in Wheaton is approximately 83%, offering insight into how humid the weather typically is during this month.

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

May UV Index in Wheaton

In Wheaton in May, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Wheaton.

Maximum UV Index Levels in Wheaton for May

The chart shows the monthly maximum UV Index (UVI) for Wheaton in May, 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 May, the maximum UV index in Wheaton typically reaches 10, which falls under the very high exposure category.

Data source: Wheaton May 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 May 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 May’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 May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	2°C (36°F)	91 mm (3.6 inches)	81%	moderate
February Weather	4°C (39°F)	95 mm (3.7 inches)	78%	high
March Weather	10°C (50°F)	159 mm (6.3 inches)	76%	high
April Weather	13°C (56°F)	174 mm (6.8 inches)	78%	very high
May Weather	19°C (66°F)	172 mm (6.8 inches)	83%	very high
June Weather	24°C (76°F)	104 mm (4.1 inches)	83%	extreme
July Weather	26°C (79°F)	93 mm (3.7 inches)	78%	extreme
August Weather	25°C (77°F)	120 mm (4.7 inches)	68%	very high
September Weather	23°C (73°F)	56 mm (2.2 inches)	64%	very high
October Weather	15°C (59°F)	161 mm (6.3 inches)	70%	high
November Weather	8°C (47°F)	70 mm (2.7 inches)	83%	moderate
December Weather	6°C (42°F)	61 mm (2.4 inches)	87%	moderate