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Climate · Sun Valley

Sun Valley in March

Chilly and damp, as the days lengthen.

Typical weather, averaged over 30 years

March in Sun Valley is chilly: highs near 41°F, lows near 18°F. Rain or snow falls on about three days a week, more often as the month goes on, and the days lengthen by 1 hour 25 minutes from the first week to the last.March in Sun Valley is chilly: highs near 5°C, lows near -8°C. Rain or snow falls on about three days a week, more often as the month goes on, and the days lengthen by 1 hour 25 minutes from the first week to the last.

High
41°F5°Caverage
Low
18°F-8°Caverage
Wet days
3a week · 39% of days
Daylight
11h 51mon average

Is March a good time to visit Sun Valley?

March sits outside Sun Valley's best months, which run from July to September. Expect chilly days and rain or snow on about three days a week.

How we judge it: every month is scored on how close its typical high comes to the range from 70°F to 80°F, how mild its nights are, and how rarely it rains. The best months are the run of months that scores best.How we judge it: every month is scored on how close its typical high comes to the range from 21°C to 27°C, how mild its nights are, and how rarely it rains. The best months are the run of months that scores best.

How March sits in the year

week by week

Temperature

Highs near 41°F in March, against 34°F to 84°F through the year.Highs near 5°C in March, against 1°C to 29°C through the year.

Chance of a wet day

39% of days in March, against 14% to 41% through the year.

Cloud cover

61% cover in March, against 24% to 63% through the year.

Daylight

11h 51m in March, against 8h 59m to 15h 23m through the year.

Week by week, lightly smoothed, with March shaded. The olive line marks the best months. Hover or tap a week for its figures.

Either side

  1. February37°3°low 13°low -11°2 wet days a weekRain on about two days a week.
  2. March41°5°low 18°low -8°3 wet days a weekRain on about three days a week.
  3. April48°9°low 24°low -4°3 wet days a weekRain on about three days a week.

Where Sun Valley sits, in March

America/Boise
this place
typical high in March 40°F4°C95°F35°C
Sunrise, mid-March
7:52 AMsets 7:42 PM
Above the sea
1,734 mhigh country
Latitude
43.7°Nnorthern hemisphere
Nearest of ours
Stanley75 km north-west

The land around Sun Valley, shaded by its typical high in March, the planning map's own layer. Hover the map for the figure at that spot; tap it on a phone. Clock times are local, for the 15th.

Elsewhere in United States in March

high · low · wet days
See March on the planning mapThe whole year in Sun Valley

Typical weather, averaged over 30 years (1995–2024), from the 11 km grid square nearest Sun Valley. Temperatures are adjusted against 66 weather stations: daytime highs read about 3.1°F cold in the source data and are raised to match, and both highs and lows are adjusted for the town's height (1,734 m) against the climate model's (2,154 m).Temperatures are adjusted against 66 weather stations: daytime highs read about 1.7°C cold in the source data and are raised to match, and both highs and lows are adjusted for the town's height (1,734 m) against the climate model's (2,154 m). Daylight is calculated from latitude. Charts are lightly smoothed week to week; the figures in the table are not. Source: Copernicus ERA5-Land reanalysis; cloud cover from NASA's MERRA-2 reanalysis, on a coarser grid of about 50 km. Contains modified Copernicus Climate Change Service information 2026; neither the European Commission nor ECMWF is responsible for any use of it. These are averages, not a forecast.

Daylight is calculated from latitude. Charts are lightly smoothed week to week; the figures in the table are not.

Source: Copernicus ERA5-Land reanalysis; cloud cover from NASA's MERRA-2 reanalysis, on a coarser grid of about 50 km. Contains modified Copernicus Climate Change Service information 2026; neither the European Commission nor ECMWF is responsible for any use of it. These are averages, not a forecast.