March Weather in Keystone, United States

Last updated: June 24, 2025

In Keystone, United States, the average temperature in March hovers around 3°C (38°F), but don't be surprised by the extremes—temperatures can plummet to a chilling -23°C (-8°F) or soar to a pleasant 23°C (73°F). Expect 73 mm (2.9 in) of precipitation over 8 days, and with an average humidity of 81%, you'll definitely feel the crispness in the air.

March Temperature in Keystone

In March in Keystone, the average temperature is 3°C (38°F). The maximum can reach 23°C (73°F), while the minimum can drop as low as -23°C (-8°F). Therefore, it's advisable to pack layers to prepare for a wide range of temperatures when visiting.

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

The chart illustrates March temperature patterns in Keystone, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Keystone, March typically has an average temperature of 3°C (38°F), with highs reaching up to 23°C (73°F) and lows dropping to around -23°C (-8°F).

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

March Precipitation in Keystone

In Keystone in March, the precipitation amount is 73 mm (2.9 in) over a span of 8 days.

March Precipitation Trends in Keystone

The chart displays monthly precipitation patterns in Keystone, 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 Keystone, March typically receives around 73 mm (2.9 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 Keystone

In Keystone in March, humidity is 81%. With an average temperature of 3°C (38°F), this humidity feels like a heavy blanket wrapped around you, making outdoor activities uncomfortable and travel challenging due to the cold, damp air.

March Average Humidity in Keystone

This chart illustrates the average monthly humidity levels in Keystone, 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 Keystone is approximately 81%, 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 Keystone

In Keystone in March, the maximum UV index is 6, which corresponds to a high Exposure Category. The time to burn is approximately 25 minutes. To find the hourly UV index in Keystone, you can refer to this Hourly UV Index in Keystone.

Maximum UV Index Levels in Keystone for March

The chart shows the monthly maximum UV Index (UVI) for Keystone 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 Keystone typically reaches 6, which falls under the high exposure category.

Data source: Keystone 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 Keystone Compares to Other Months

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

This table compares monthly weather conditions in Keystone, 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 (21°F)	45 mm (1.8 inches)	81%	moderate
February Weather	-5°C (23°F)	52 mm (2.1 inches)	81%	moderate
March Weather	3°C (38°F)	73 mm (2.9 inches)	81%	high
April Weather	9°C (48°F)	85 mm (3.3 inches)	82%	very high
May Weather	16°C (62°F)	162 mm (6.4 inches)	78%	very high
June Weather	23°C (73°F)	143 mm (5.6 inches)	81%	extreme
July Weather	24°C (76°F)	91 mm (3.6 inches)	79%	very high
August Weather	22°C (72°F)	64 mm (2.5 inches)	77%	very high
September Weather	20°C (67°F)	121 mm (4.8 inches)	78%	very high
October Weather	11°C (52°F)	143 mm (5.6 inches)	78%	high
November Weather	3°C (38°F)	45 mm (1.8 inches)	87%	moderate
December Weather	-1°C (30°F)	40 mm (1.6 inches)	84%	moderate