May Weather in Coralville, United States

Last updated: June 24, 2025

In Coralville, United States, the average temperature in May is a pleasant 17°C (62°F). However, temperatures can fluctuate significantly, with a minimum of 0°C (33°F) and a maximum reaching 35°C (95°F). Expect about 139 mm (5.5 in) of precipitation spread over 15 days, and enjoy the typically high humidity at an average of 78%.

May Temperature in Coralville

In May in Coralville, the average temperature is a mild 17°C (62°F). The maximum can reach a scorching 35°C (95°F), while the minimum can drop down to a chilly 0°C (33°F). Be prepared for a diverse climate when traveling during this month in Coralville.

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

The chart illustrates May temperature patterns in Coralville, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Coralville, May typically has an average temperature of 17°C (62°F), with highs reaching up to 35°C (95°F) and lows dropping to around 0°C (33°F).

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

May Precipitation in Coralville

In Coralville in May, the precipitation amount is 139 mm (5.5 in), occurring over 15 days.

May Precipitation Trends in Coralville

The chart displays monthly precipitation patterns in Coralville, 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 Coralville, May typically receives around 139 mm (5.5 inches) of precipitation spread over approximately 15 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 Coralville

In Coralville in May, humidity is 78%. With an average temperature of 17°C (62°F), this humidity feels like a warm, enveloping blanket, making travel feel a bit sticky and heavy but also refreshing, as long as you're prepared with light clothing and plenty of water.

May Average Humidity in Coralville

This chart illustrates the average monthly humidity levels in Coralville, 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 Coralville is approximately 78%, 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 Coralville

In Coralville in May, 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 Coralville.

Maximum UV Index Levels in Coralville for May

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

Data source: Coralville 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 Coralville Compares to Other Months

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

This table compares monthly weather conditions in Coralville, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-6°C (22°F)	48 mm (1.9 inches)	81%	moderate
February Weather	-4°C (24°F)	58 mm (2.3 inches)	81%	moderate
March Weather	4°C (39°F)	80 mm (3.2 inches)	81%	high
April Weather	9°C (49°F)	84 mm (3.3 inches)	82%	very high
May Weather	17°C (62°F)	139 mm (5.5 inches)	78%	very high
June Weather	23°C (74°F)	128 mm (5.0 inches)	81%	extreme
July Weather	25°C (77°F)	79 mm (3.1 inches)	79%	very high
August Weather	23°C (73°F)	83 mm (3.3 inches)	77%	very high
September Weather	20°C (68°F)	130 mm (5.1 inches)	78%	very high
October Weather	12°C (53°F)	135 mm (5.3 inches)	78%	high
November Weather	3°C (38°F)	50 mm (2.0 inches)	87%	moderate
December Weather	-1°C (31°F)	46 mm (1.8 inches)	84%	moderate