March Weather in Ketchum, United States

Last updated: June 24, 2025

In March, the average temperature in Ketchum, United States hovers around -3°C (26°F), with extremes that can plummet to a chilling -22°C (-7°F) or rise to a surprisingly mild 10°C (50°F). Expect around 60 mm (2.4 in) of precipitation spread across 12 days, contributing to the area's average humidity of 85%. Stay warm and prepared for the elements!

March Temperature in Ketchum

In March in Ketchum, the average temperature is -3°C (26°F). Maximums can reach 10°C (50°F), while minimums can plunge as low as -22°C (-7°F). Travelers should prepare for a wide range of temperatures and dress in layers to stay comfortable during their visit.

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

The chart illustrates March temperature patterns in Ketchum, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Ketchum, March typically has an average temperature of -3°C (26°F), with highs reaching up to 10°C (50°F) and lows dropping to around -22°C (-7°F).

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

March Precipitation in Ketchum

In Ketchum in March, the precipitation amount is 60 mm (2.4 in) over a span of 12 days.

March Precipitation Trends in Ketchum

The chart displays monthly precipitation patterns in Ketchum, 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 Ketchum, March typically receives around 60 mm (2.4 inches) of precipitation spread over approximately 12 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 Ketchum

In Ketchum in March humidity is 85%. With an average temperature of -3°C (26°F), this humidity feels like an uncomfortable chill that penetrates your clothes, making traveling quite unpleasant as each breath is met with a brisk dampness that numbs the skin.

March Average Humidity in Ketchum

This chart illustrates the average monthly humidity levels in Ketchum, 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 Ketchum is approximately 85%, 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 Ketchum

In Ketchum in March, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Ketchum.

Maximum UV Index Levels in Ketchum for March

The chart shows the monthly maximum UV Index (UVI) for Ketchum 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 Ketchum typically reaches 8, which falls under the very high exposure category.

Data source: Ketchum 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 Ketchum Compares to Other Months

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

This table compares monthly weather conditions in Ketchum, showing how March’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-8°C (17°F)	56 mm (2.2 inches)	91%	moderate
February Weather	-8°C (18°F)	86 mm (3.4 inches)	92%	moderate
March Weather	-3°C (26°F)	60 mm (2.4 inches)	85%	very high
April Weather	0°C (31°F)	52 mm (2.0 inches)	76%	very high
May Weather	4°C (40°F)	61 mm (2.4 inches)	66%	extreme
June Weather	11°C (52°F)	46 mm (1.8 inches)	62%	extreme
July Weather	16°C (62°F)	15 mm (0.6 inches)	53%	extreme
August Weather	15°C (60°F)	33 mm (1.3 inches)	42%	very high
September Weather	10°C (51°F)	30 mm (1.2 inches)	46%	very high
October Weather	2°C (35°F)	42 mm (1.6 inches)	64%	high
November Weather	-4°C (26°F)	46 mm (1.8 inches)	83%	moderate
December Weather	-9°C (16°F)	49 mm (1.9 inches)	87%	moderate