nomadseason

Monthly climate in Sun Valley, Idaho, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Sun Valley features a subarctic climate (Dsc).Temperatures typically range between -9 °C (16 °F) and 16 °C (62 °F) through the year, but rarely can drop to -27 °C (-16 °F) or can rise to as high as 30 °C (86 °F).The average annual precipitation amounts to about 575 mm (22.6 inches) and receives 109 rainy days on the 1 mm (0.04 inches) threshold annually.Sun Valley enjoys an average of 3373 hours of sunshine throughout the year, and daylight varies from 8 hours 58 minutes to 15 hours 22 minutes per day.

Monthly average temperatures in Sun Valley, Idaho, United States §

The warmest months in Sun Valley are June, July and August, with daily mean temperatures ranging from 11 to 16 °C (52 - 62 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -9 to -8 °C (16 - 18 °F) throughout the day. On average each year, Sun Valley experiences 25 days above 25 °C (77.0 °F) and 221 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Sun Valley, Idaho, United States.Generated using Copernicus Climate Change Service information.Data for period from January 2017 to June 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Maximum 2°C
(36°F)		 6°C
(42°F)		 10°C
(50°F)		 14°C
(57°F)		 24°C
(75°F)		 28°C
(82°F)		 28°C
(83°F)		 30°C
(86°F)		 29°C
(84°F)		 22°C
(71°F)		 12°C
(55°F)		 8°C
(46°F)
Mean maximum 1°C
(34°F)		 3°C
(38°F)		 7°C
(46°F)		 12°C
(53°F)		 18°C
(65°F)		 21°C
(71°F)		 27°C
(82°F)		 28°C
(83°F)		 26°C
(80°F)		 16°C
(61°F)		 9°C
(48°F)		 3°C
(38°F)
Average high -4°C
(25°F)		 -4°C
(26°F)		 1°C
(35°F)		 4°C
(40°F)		 10°C
(50°F)		 18°C
(64°F)		 24°C
(75°F)		 23°C
(73°F)		 18°C
(64°F)		 8°C
(46°F)		 2°C
(36°F)		 -4°C
(25°F)
Daily mean -8°C
(17°F)		 -8°C
(18°F)		 -3°C
(26°F)		 -0°C
(31°F)		 4°C
(40°F)		 11°C
(52°F)		 16°C
(62°F)		 15°C
(60°F)		 10°C
(51°F)		 2°C
(35°F)		 -4°C
(26°F)		 -9°C
(16°F)
Average low -12°C
(10°F)		 -12°C
(10°F)		 -8°C
(18°F)		 -6°C
(22°F)		 -2°C
(29°F)		 4°C
(39°F)		 8°C
(47°F)		 7°C
(46°F)		 3°C
(37°F)		 -4°C
(25°F)		 -9°C
(16°F)		 -13°C
(8°F)
Mean minimum -21°C
(-6°F)		 -20°C
(-4°F)		 -17°C
(2°F)		 -14°C
(8°F)		 -9°C
(15°F)		 -3°C
(27°F)		 3°C
(37°F)		 1°C
(34°F)		 -6°C
(21°F)		 -16°C
(3°F)		 -19°C
(-1°F)		 -23°C
(-9°F)
Minimum -27°C
(-16°F)		 -22°C
(-8°F)		 -22°C
(-7°F)		 -16°C
(3°F)		 -12°C
(10°F)		 -4°C
(24°F)		 -0°C
(32°F)		 -3°C
(27°F)		 -13°C
(10°F)		 -24°C
(-11°F)		 -23°C
(-10°F)		 -25°C
(-12°F)

Compare climate in Sun Valley with other places

Compare temperature, precipitation, sunshine, UV index in Sun Valley, Idaho, United States with other places around the world.

Monthly average precipitation in Sun Valley, Idaho, United States §

Sun Valley usually has the most precipitation in February, March and May, with an average of 12 rainy days and 69 mm (2.7 inches) of precipitation per month.The driest months in Sun Valley are July, August and September. On average, 26 mm (1.0 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Sun Valley, Idaho, United States.Generated using Copernicus Climate Change Service information.Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Average precipitation mm (inches) 56 (2.2) 86 (3.4) 60 (2.4) 52 (2.0) 61 (2.4) 46 (1.8) 15 (0.6) 33 (1.3) 30 (1.2) 42 (1.6) 46 (1.8) 49 (1.9)
Average precipitation days (≥ 1 mm) 10 13 12 11 13 9 4 6 5 7 9 10

Monthly sunshine hours in Sun Valley, Idaho, United States §

The sunniest months in Sun Valley are June, July and August, when the sun shines an average of 12 hours 30 minutes a day.Least sunny months in Sun Valley: January, February and December receive an average of 5 hours 35 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Sun Valley, Idaho, United States.Generated using Copernicus Atmosphere Monitoring Service information.Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Mean monthly sunshine hours 142 187 273 307 352 384 401 364 306 264 211 178
Mean daily daylight hours 9h 20m 10h 30m 11h 58m 13h 28m 14h 44m 15h 22m 15h 1m 13h 53m 12h 26m 10h 57m 9h 38m 8h 58m

Solar UV radiation in Sun Valley, Idaho, United States §

Sun Valley experiences the highest level of ultraviolet (UV) radiation in May, June and July, when the maximum UV index can reach values of 11 - 12, which corresponds to the Extreme category of sun exposure.January, November and December are in the Moderate exposure category. In these months, the maximum values of the UV index do not exceed 4. For more detailed information, check out our hourly Sun Valley UV Index data.

Average daily maximum UV levels by month for Sun Valley, Idaho, United States.Generated using Copernicus Atmosphere Monitoring Service information.Data for period from January 2022 to January 2023.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
UV Index (month maximum) 3 5 8 9 11 12 11 10 9 6 4 3