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Climate · Sun Valley

Sun Valley in April

Chilly and damp, as the days lengthen.

Typical weather, averaged over 30 years

April in Sun Valley is chilly: highs near 48°F, lows near 24°F. Rain or snow falls on about three days a week, and the days lengthen by 1 hour 2 minutes from the first week to the last.April in Sun Valley is chilly: highs near 9°C, lows near -4°C. Rain or snow falls on about three days a week, and the days lengthen by 1 hour 2 minutes from the first week to the last.

High
48°F9°Caverage
Low
24°F-4°Caverage
Wet days
3a week · 41% of days
Daylight
13h 23mon average

Is April a good time to visit Sun Valley?

April 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 April sits in the year

week by week

Temperature

Highs near 48°F in April, against 34°F to 84°F through the year.Highs near 9°C in April, against 1°C to 29°C through the year.

Chance of a wet day

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

Cloud cover

58% cover in April, against 24% to 63% through the year.

Daylight

13h 23m in April, against 8h 59m to 15h 23m through the year.

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

Either side

  1. March41°5°low 18°low -8°3 wet days a weekRain on about three days a week.
  2. April48°9°low 24°low -4°3 wet days a weekRain on about three days a week.
  3. May59°15°low 31°low -1°3 wet days a weekRain on about three days a week.

Where Sun Valley sits, in April

America/Boise
this place
typical high in April 40°F4°C95°F35°C
Sunrise, mid-April
6:56 AMsets 8:19 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 April, 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 April

high · low · wet days
See April 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.