nomadseason

March Weather in Sun Valley, United States

Last updated: June 24, 2025

In March, the average temperature in Sun Valley, United States hovers around 3°C (38°F). Be prepared for a chill, as the minimum can dip to -16°C (4°F), while the mercury can peak at a surprising 21°C (71°F). Expect 71 mm (2.8 in) of precipitation spread across 11 days, contributing to an average humidity of 84%. Stay warm and dry!

March Temperature in Sun Valley

In March in Sun Valley, the average temperature is 3°C (38°F). Maximum temperatures can reach 21°C (71°F), while minimums can drop as low as -16°C (4°F). Visitors should be prepared for a wide range of temperatures and dress accordingly for their travels.

March Weather in Sun Valley: Daily Temperature Highs, Lows, and Averages

The chart illustrates March temperature patterns in Sun Valley, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Sun Valley, March typically has an average temperature of 3°C (38°F), with highs reaching up to 21°C (71°F) and lows dropping to around -16°C (4°F).
JanFebMarAprMayJunJulAugSepOctNovDec323338475566747364504132
Data source: Temperature data for Sun Valley generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

March Precipitation in Sun Valley

In Sun Valley in March, the precipitation amount is 71 mm (2.8 in) distributed over 11 days.

March Precipitation Trends in Sun Valley

The chart displays monthly precipitation patterns in Sun Valley, 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 Sun Valley, March typically receives around 71 mm (2.8 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec9187713239811118333965
Data source: Precipitation data for March generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

March Humidity in Sun Valley

In Sun Valley in March, humidity is 84%. With an average temperature of 3°C (38°F), this humidity feels like a damp chill that seeps into your bones, making traveling uncomfortable as the cold air clings to you and the moisture creates an oppressive heaviness in the atmosphere.

March Average Humidity in Sun Valley

This chart illustrates the average monthly humidity levels in Sun Valley, 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 Sun Valley is approximately 84%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%87%84%78%64%56%44%34%41%60%81%82%
Data source: Humidity data for March generated using information from the Copernicus Climate Change Service.

March UV Index in Sun Valley

In Sun Valley 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 Sun Valley.

Maximum UV Index Levels in Sun Valley for March

The chart shows the monthly maximum UV Index (UVI) for Sun Valley 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 Sun Valley typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec46891112121110743
Data source: Sun Valley 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 Sun Valley Compares to Other Months

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

This table compares monthly weather conditions in Sun Valley, showing how March’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather0°C (33°F)91 mm (3.6 inches)85%moderate
February Weather1°C (34°F)87 mm (3.4 inches)87%high
March Weather3°C (38°F)71 mm (2.8 inches)84%very high
April Weather8°C (47°F)32 mm (1.3 inches)78%very high
May Weather13°C (55°F)39 mm (1.5 inches)64%extreme
June Weather19°C (67°F)8 mm (0.3 inches)56%extreme
July Weather24°C (75°F)11 mm (0.4 inches)44%extreme
August Weather23°C (73°F)11 mm (0.4 inches)34%extreme
September Weather18°C (64°F)8 mm (0.3 inches)41%very high
October Weather10°C (51°F)33 mm (1.3 inches)60%high
November Weather5°C (42°F)39 mm (1.5 inches)81%moderate
December Weather0°C (32°F)64 mm (2.5 inches)82%moderate

Compare Sun Valley's Climate with Cities Worldwide