March Weather in Iowa, United States

Last updated: June 24, 2025

In March, the average temperature in Iowa, United States hovers around 18°C (65°F). Expect a minimum chill of -1°C (31°F) and a pleasant maximum of 30°C (85°F). During this time, the region experiences about 70 mm (2.7 in) of precipitation spread across 11 days, contributing to an average humidity of 79%. Prepare for varied weather while enjoying the beauty of this vibrant location!

March Temperature in Iowa

In March in Iowa, the average temperature is 18°C (65°F), with maximums rising to 30°C (85°F) and minimums dipping as low as -1°C (31°F). Travelers should be prepared for a range of temperatures, making layered clothing a wise choice for their visit.

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

The chart illustrates March 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, March typically has an average temperature of 18°C (65°F), with highs reaching up to 30°C (85°F) and lows dropping to around -1°C (31°F).

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

March Precipitation in Iowa

In Iowa in March, the precipitation amount is 70 mm (2.7 in) spread over 11 days.

March Precipitation Trends in Iowa

The chart displays monthly precipitation patterns in Iowa, with values for each month alongside March’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how March’s conditions compare to those of other months. In Iowa, March typically receives around 70 mm (2.7 inches) of precipitation spread over approximately 11 days.

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

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Millimeters (mm) Inches (in)

March Humidity in Iowa

In Iowa in March, humidity is 79%. With an average temperature of 18°C (65°F), this humidity feels like walking through a warm mist, making traveling slightly uncomfortable and sticky, but offering a refreshing escape when you find moments of shade or a breeze.

March Average Humidity in Iowa

This chart illustrates the average monthly humidity levels in Iowa, with March’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In March, average humidity in Iowa is approximately 79%, offering insight into how humid the weather typically is during this month.

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

March UV Index in Iowa

In Iowa in March, 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 Iowa.

Maximum UV Index Levels in Iowa for March

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

Data source: Iowa March 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 March 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 March’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 March’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