March Weather in Rapid City, United States

Last updated: June 24, 2025

The average temperature in Rapid City, United States during March hovers around -1°C (31°F). Expect temperatures to dip as low as -20°C (-3°F), while highs can reach up to 21°C (69°F). With 62 mm (2.4 in) of precipitation spread across 11 days, you can anticipate a damp month with an average humidity level of 87%. Prepare accordingly!

March Temperature in Rapid City

In March in Rapid City, the average temperature is -1°C (31°F). The maximum can reach 21°C (69°F) and the minimum can be as low as -20°C (-3°F). Travelers should be prepared for a wide range of temperatures and dress in layers to stay comfortable during their visit.

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

The chart illustrates March temperature patterns in Rapid City, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Rapid City, March typically has an average temperature of -1°C (31°F), with highs reaching up to 21°C (69°F) and lows dropping to around -20°C (-3°F).

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

March Precipitation in Rapid City

In Rapid City in March, the precipitation amount is 62 mm (2.4 in) spread over 11 days.

March Precipitation Trends in Rapid City

The chart displays monthly precipitation patterns in Rapid 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 Rapid City, March typically receives around 62 mm (2.4 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 Rapid City

In Rapid City in March humidity is 87%. With an average temperature of -1°C (31°F), this humidity feels like a biting chill that seeps through your clothes, making traveling incredibly uncomfortable as it adds a layer of dampness to the already cold air, leaving you shivering and wishing for warmth.

March Average Humidity in Rapid City

This chart illustrates the average monthly humidity levels in Rapid 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 Rapid City is approximately 87%, 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 Rapid City

In Rapid 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 Rapid City.

Maximum UV Index Levels in Rapid City for March

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

Data source: Rapid 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 Rapid City Compares to Other Months

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

This table compares monthly weather conditions in Rapid City, showing how March’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-6°C (22°F)	57 mm (2.2 inches)	91%	low
February Weather	-6°C (22°F)	62 mm (2.4 inches)	91%	moderate
March Weather	-1°C (31°F)	62 mm (2.4 inches)	87%	moderate
April Weather	5°C (42°F)	97 mm (3.8 inches)	87%	high
May Weather	13°C (56°F)	119 mm (4.7 inches)	82%	very high
June Weather	19°C (66°F)	111 mm (4.4 inches)	79%	very high
July Weather	21°C (71°F)	103 mm (4.1 inches)	75%	very high
August Weather	20°C (68°F)	91 mm (3.6 inches)	76%	very high
September Weather	16°C (61°F)	78 mm (3.1 inches)	79%	high
October Weather	10°C (49°F)	131 mm (5.2 inches)	83%	moderate
November Weather	2°C (35°F)	77 mm (3.0 inches)	86%	moderate
December Weather	-2°C (28°F)	74 mm (2.9 inches)	87%	low