July Weather in Iowa, United States

Last updated: June 24, 2025

In July, the average temperature in Iowa, United States hovers around 28°C (83°F). While the minimum dips to 20°C (67°F), it can also reach a scorching 38°C (101°F). Expect precipitation of about 158 mm (6.2 in) spread over 19 days, contributing to an average humidity of 73%.

July Temperature in Iowa

In July in Iowa, the average temperature is 28°C (83°F). Maximums can reach up to 38°C (101°F), while minimums can drop to as low as 20°C (67°F). This makes it an ideal time for travelers seeking warm weather and plenty of sunshine.

July Weather in Iowa: Daily Temperature Highs, Lows, and Averages

The chart illustrates July temperature patterns in Iowa, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Iowa, July typically has an average temperature of 28°C (83°F), with highs reaching up to 38°C (101°F) and lows dropping to around 20°C (67°F).

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

July Precipitation in Iowa

In Iowa in July, the total precipitation amount is 158 mm (6.2 in) over the course of 19 days.

July Precipitation Trends in Iowa

The chart displays monthly precipitation patterns in Iowa, with values for each month alongside July’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how July’s conditions compare to those of other months. In Iowa, July typically receives around 158 mm (6.2 inches) of precipitation spread over approximately 19 days.

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

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Millimeters (mm) Inches (in)

July Humidity in Iowa

In Iowa in July, humidity is 73%. With an average temperature of 28°C (83°F), this humidity feels like a thick blanket enveloping your skin, making travel feel heavy and stifling, often requiring frequent breaks in shaded or air-conditioned areas to stay comfortable.

July Average Humidity in Iowa

This chart illustrates the average monthly humidity levels in Iowa, with July’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In July, average humidity in Iowa is approximately 73%, offering insight into how humid the weather typically is during this month.

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

July UV Index in Iowa

In Iowa in July, the maximum UV index is 12, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, underscoring the importance of sun protection. For detailed information, you can check the Hourly UV Index in Iowa.

Maximum UV Index Levels in Iowa for July

The chart shows the monthly maximum UV Index (UVI) for Iowa in July, 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 July, the maximum UV index in Iowa typically reaches 12, which falls under the extreme exposure category.

Data source: Iowa July 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 July Weather in Iowa Compares to Other Months

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

This table compares monthly weather conditions in Iowa, showing how July’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	12°C (53°F)	117 mm (4.6 inches)	81%	moderate
February Weather	14°C (58°F)	107 mm (4.2 inches)	81%	very high
March Weather	18°C (65°F)	70 mm (2.7 inches)	79%	very high
April Weather	20°C (69°F)	155 mm (6.1 inches)	80%	very high
May Weather	25°C (77°F)	193 mm (7.6 inches)	81%	extreme
June Weather	27°C (81°F)	163 mm (6.4 inches)	76%	extreme
July Weather	28°C (83°F)	158 mm (6.2 inches)	73%	extreme
August Weather	28°C (83°F)	179 mm (7.1 inches)	71%	extreme
September Weather	26°C (80°F)	163 mm (6.4 inches)	72%	very high
October Weather	22°C (72°F)	122 mm (4.8 inches)	73%	very high
November Weather	16°C (60°F)	75 mm (2.9 inches)	83%	high
December Weather	14°C (57°F)	119 mm (4.7 inches)	88%	moderate