June Weather in Iowa City, United States

Last updated: June 24, 2025

In June, the average temperature in Iowa City, United States hovers around 23°C (74°F). Temperatures can range from a chilly 9°C (49°F) to a warm 35°C (96°F), ensuring a diverse climate experience. Expect about 128 mm (5.0 in) of precipitation over 10 days, with an average humidity of 81%, creating a lush and vibrant atmosphere throughout the month.

June Temperature in Iowa City

In June in Iowa City, the average temperature is 23°C (74°F). Maximums can reach 35°C (96°F) and minimums can be as low as 9°C (49°F). It’s a great time to explore Iowa City, so pack accordingly to enjoy a range of outdoor activities!

June Weather in Iowa City: Daily Temperature Highs, Lows, and Averages

The chart illustrates June temperature patterns in Iowa City, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Iowa City, June typically has an average temperature of 23°C (74°F), with highs reaching up to 35°C (96°F) and lows dropping to around 9°C (49°F).

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

June Precipitation in Iowa City

In Iowa City in June, the total precipitation amount is 128 mm (5.0 in) recorded over a span of 10 days.

June Precipitation Trends in Iowa City

The chart displays monthly precipitation patterns in Iowa City, with values for each month alongside June’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how June’s conditions compare to those of other months. In Iowa City, June typically receives around 128 mm (5.0 inches) of precipitation spread over approximately 10 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

June Humidity in Iowa City

In Iowa City in June, humidity is 81%. With an average temperature of 23°C (74°F), this humidity feels like a warm, heavy blanket draped over your skin, making travel feel a bit more sluggish and requiring plenty of water breaks to stay comfortable.

June Average Humidity in Iowa City

This chart illustrates the average monthly humidity levels in Iowa City, with June’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In June, average humidity in Iowa City is approximately 81%, offering insight into how humid the weather typically is during this month.

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

June UV Index in Iowa City

In Iowa City in June, 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 Iowa City.

Maximum UV Index Levels in Iowa City for June

The chart shows the monthly maximum UV Index (UVI) for Iowa City in June, 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 June, the maximum UV index in Iowa City typically reaches 11, which falls under the extreme exposure category.

Data source: Iowa City June 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 June Weather in Iowa City Compares to Other Months

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

This table compares monthly weather conditions in Iowa City, showing how June’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