March Weather in Sioux City, United States

Last updated: June 24, 2025

In Sioux City, United States, the average temperature in March hovers around 3°C (38°F). During this time, temperatures can range from a brisk -22°C (-8°F) to a surprising 25°C (77°F). Precipitation averages 81 mm (3.2 in) over about 8 days, contributing to an average humidity of 75%.

March Temperature in Sioux City

In March in Sioux City, the average temperature is 3°C (38°F), with maximums reaching up to 25°C (77°F) and minimums dropping as low as -22°C (-8°F). This wide temperature range means it's essential to pack layers and be prepared for both chilly and warmer days while exploring the area.

March Weather in Sioux City: Daily Temperature Highs, Lows, and Averages

The chart illustrates March temperature patterns in Sioux City, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Sioux City, March typically has an average temperature of 3°C (38°F), with highs reaching up to 25°C (77°F) and lows dropping to around -22°C (-8°F).

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

March Precipitation in Sioux City

In Sioux City in March, the precipitation amount is 81 mm (3.2 in) over the course of 8 days.

March Precipitation Trends in Sioux City

The chart displays monthly precipitation patterns in Sioux City, 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 Sioux City, March typically receives around 81 mm (3.2 inches) of precipitation spread over approximately 8 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 Sioux City

In Sioux City in March humidity is 75%. With an average temperature of 3°C (38°F), this humidity feels like a chill that clings to your skin, making outdoor exploration uncomfortable and urging you to seek warmth indoors.

March Average Humidity in Sioux City

This chart illustrates the average monthly humidity levels in Sioux City, 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 Sioux City is approximately 75%, 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 Sioux City

In Sioux City in March, the maximum UV index reaches 5, which corresponds to a moderate Exposure Category. Under these conditions, the estimated time to burn is approximately 30 minutes. For more details, you can check the Hourly UV Index in Sioux City.

Maximum UV Index Levels in Sioux City for March

The chart shows the monthly maximum UV Index (UVI) for Sioux City 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 Sioux City typically reaches 5, which falls under the moderate exposure category.

Data source: Sioux City 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 Sioux City Compares to Other Months

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

This table compares monthly weather conditions in Sioux City, showing how March’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-5°C (23°F)	28 mm (1.1 inches)	80%	moderate
February Weather	-5°C (23°F)	29 mm (1.2 inches)	84%	moderate
March Weather	3°C (38°F)	81 mm (3.2 inches)	75%	moderate
April Weather	9°C (48°F)	80 mm (3.2 inches)	79%	very high
May Weather	16°C (61°F)	140 mm (5.5 inches)	74%	very high
June Weather	23°C (74°F)	102 mm (4.0 inches)	81%	extreme
July Weather	25°C (77°F)	66 mm (2.6 inches)	82%	very high
August Weather	23°C (73°F)	109 mm (4.3 inches)	80%	very high
September Weather	20°C (68°F)	101 mm (4.0 inches)	75%	very high
October Weather	10°C (51°F)	77 mm (3.0 inches)	77%	moderate
November Weather	3°C (38°F)	27 mm (1.0 inches)	85%	moderate
December Weather	-2°C (29°F)	41 mm (1.6 inches)	83%	low