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Monthly climate in Sun Valley, Arizona, United States

Last updated: March 2, 2024

Under the Köppen–Geiger climate classification Sun Valley features a hot-summer Mediterranean climate (Csa). Temperatures typically range between 4 °C (40 °F) and 24 °C (76 °F) through the year, but rarely can drop to -13 °C (9 °F) or can rise to as high as 38 °C (101 °F). The average annual precipitation amounts to about 559 mm (22.0 inches) and receives 71 rainy days on the 1 mm (0.04 inches) threshold annually. Sun Valley enjoys an average of 3591 hours of sunshine throughout the year, and daylight varies from 9 hours 53 minutes to 14 hours 23 minutes per day.

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

The warmest months in Sun Valley are June, July and August, with daily mean temperatures ranging from 24 to 24 °C (75 - 76 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 4 to 5 °C (40 - 41 °F) throughout the day. On average each year, Sun Valley experiences 115 days above 25 °C (77.0 °F) and 62 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, Arizona, 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 18°C
(66°F)		 20°C
(68°F)		 25°C
(77°F)		 29°C
(85°F)		 33°C
(92°F)		 38°C
(101°F)		 37°C
(99°F)		 38°C
(100°F)		 36°C
(98°F)		 31°C
(89°F)		 26°C
(79°F)		 21°C
(69°F)
Mean maximum 17°C
(62°F)		 18°C
(64°F)		 22°C
(71°F)		 27°C
(80°F)		 30°C
(86°F)		 34°C
(93°F)		 35°C
(96°F)		 35°C
(95°F)		 33°C
(92°F)		 27°C
(81°F)		 23°C
(73°F)		 18°C
(65°F)
Average high 11°C
(51°F)		 11°C
(52°F)		 15°C
(58°F)		 20°C
(69°F)		 24°C
(75°F)		 30°C
(87°F)		 31°C
(87°F)		 30°C
(87°F)		 28°C
(82°F)		 22°C
(71°F)		 17°C
(63°F)		 11°C
(52°F)
Daily mean 4°C
(40°F)		 5°C
(41°F)		 8°C
(47°F)		 13°C
(56°F)		 17°C
(63°F)		 24°C
(75°F)		 24°C
(76°F)		 24°C
(75°F)		 21°C
(70°F)		 15°C
(59°F)		 10°C
(50°F)		 5°C
(41°F)
Average low -1°C
(31°F)		 -1°C
(31°F)		 2°C
(35°F)		 5°C
(42°F)		 9°C
(48°F)		 15°C
(59°F)		 18°C
(64°F)		 17°C
(63°F)		 14°C
(57°F)		 8°C
(47°F)		 3°C
(39°F)		 -0°C
(32°F)
Mean minimum -10°C
(14°F)		 -8°C
(17°F)		 -6°C
(21°F)		 -1°C
(30°F)		 2°C
(35°F)		 9°C
(48°F)		 14°C
(58°F)		 14°C
(58°F)		 8°C
(46°F)		 1°C
(33°F)		 -3°C
(27°F)		 -7°C
(20°F)
Minimum -12°C
(11°F)		 -13°C
(9°F)		 -9°C
(16°F)		 -3°C
(26°F)		 -0°C
(32°F)		 7°C
(44°F)		 13°C
(55°F)		 11°C
(53°F)		 4°C
(39°F)		 -3°C
(26°F)		 -9°C
(16°F)		 -12°C
(11°F)

Compare climate in Sun Valley with other places

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

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

Sun Valley usually has the most precipitation in February, March and July, with an average of 9 rainy days and 85 mm (3.4 inches) of precipitation per month. The driest months in Sun Valley are April, May and June. On average, 12 mm (0.5 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Sun Valley, Arizona, 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) 64 (2.5) 80 (3.1) 64 (2.5) 11 (0.4) 17 (0.7) 7 (0.3) 111 (4.4) 50 (1.9) 36 (1.4) 36 (1.4) 32 (1.3) 51 (2.0)
Average precipitation days (≥ 1 mm) 6 6 7 3 4 1 15 12 4 4 2 7

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

The sunniest months in Sun Valley are May, June and July, when the sun shines an average of 11 hours 55 minutes a day. Least sunny months in Sun Valley: January, February and December receive an average of 7 hours 10 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Sun Valley, Arizona, 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 184 236 299 329 372 372 352 342 314 295 258 231
Mean daily daylight hours 10h 8m 10h 57m 11h 59m 13h 3m 13h 57m 14h 23m 14h 8m 13h 21m 12h 20m 11h 16m 10h 21m 9h 53m

Solar UV radiation in Sun Valley, Arizona, 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 12 - 13, which corresponds to the Extreme category of sun exposure. January, November and December are in the Moderate / High exposure category. In these months, the maximum values of the UV index do not exceed 6. For more detailed information, check out our hourly Sun Valley UV Index data.

Average daily maximum UV levels by month for Sun Valley, Arizona, 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) 4 7 9 11 12 13 12 11 11 8 6 5

Detailed Monthly Weather Insights for Sun Valley, Arizona, United States

Discover in-depth weather details for every month in Sun Valley. Click through the links below for comprehensive overviews of temperature trends, precipitation levels, sunshine hours, and solar UV radiation specifics. Whether planning a visit or simply curious about Sun Valley's climate nuances, these monthly breakdowns provide the information you need for an informed understanding of what to expect throughout the year.

Each link leads to a detailed account of the typical weather conditions for that month, providing both locals and tourists with vital information to plan their daily activities, wardrobe, and travel itineraries accordingly.