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Monthly climate in Idyllwild, California, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Idyllwild features a hot-summer Mediterranean climate (Csa).Temperatures typically range between 9 °C (49 °F) and 26 °C (79 °F) through the year, but rarely can drop to -10 °C (14 °F) or can rise to as high as 42 °C (108 °F).The average annual precipitation amounts to about 368 mm (14.5 inches) and receives 48 rainy days on the 1 mm (0.04 inches) threshold annually.Idyllwild enjoys an average of 3685 hours of sunshine throughout the year, and daylight varies from 9 hours 56 minutes to 14 hours 20 minutes per day.

Monthly average temperatures in Idyllwild, California, United States §

The warmest months in Idyllwild are July, August and September, with daily mean temperatures ranging from 23 to 26 °C (74 - 79 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 9 to 9 °C (49 - 49 °F) throughout the day. On average each year, Idyllwild experiences 141 days above 25 °C (77.0 °F) and 10 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Idyllwild, California, 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 26°C
(79°F)		 26°C
(78°F)		 29°C
(85°F)		 32°C
(90°F)		 36°C
(97°F)		 39°C
(103°F)		 40°C
(104°F)		 40°C
(103°F)		 42°C
(108°F)		 36°C
(98°F)		 29°C
(85°F)		 25°C
(77°F)
Mean maximum 22°C
(72°F)		 23°C
(73°F)		 25°C
(78°F)		 30°C
(87°F)		 32°C
(90°F)		 35°C
(96°F)		 38°C
(101°F)		 38°C
(101°F)		 38°C
(100°F)		 32°C
(90°F)		 28°C
(83°F)		 23°C
(74°F)
Average high 15°C
(60°F)		 16°C
(60°F)		 17°C
(63°F)		 22°C
(72°F)		 24°C
(76°F)		 30°C
(87°F)		 33°C
(92°F)		 33°C
(93°F)		 31°C
(87°F)		 25°C
(78°F)		 21°C
(70°F)		 15°C
(60°F)
Daily mean 9°C
(49°F)		 9°C
(49°F)		 11°C
(52°F)		 15°C
(59°F)		 17°C
(63°F)		 23°C
(73°F)		 26°C
(79°F)		 26°C
(79°F)		 23°C
(74°F)		 18°C
(64°F)		 14°C
(57°F)		 9°C
(49°F)
Average low 4°C
(40°F)		 4°C
(39°F)		 5°C
(42°F)		 9°C
(48°F)		 10°C
(51°F)		 15°C
(60°F)		 19°C
(67°F)		 20°C
(68°F)		 17°C
(62°F)		 11°C
(52°F)		 8°C
(46°F)		 4°C
(40°F)
Mean minimum -2°C
(28°F)		 -4°C
(26°F)		 -1°C
(31°F)		 3°C
(38°F)		 4°C
(40°F)		 9°C
(49°F)		 14°C
(58°F)		 14°C
(58°F)		 11°C
(52°F)		 5°C
(41°F)		 3°C
(37°F)		 -2°C
(29°F)
Minimum -6°C
(22°F)		 -10°C
(14°F)		 -3°C
(27°F)		 2°C
(36°F)		 3°C
(37°F)		 8°C
(46°F)		 11°C
(52°F)		 13°C
(56°F)		 7°C
(44°F)		 3°C
(38°F)		 -0°C
(32°F)		 -5°C
(23°F)

Compare climate in Idyllwild with other places

Compare temperature, precipitation, sunshine, UV index in Idyllwild, California, United States with other places around the world.

Monthly average precipitation in Idyllwild, California, United States §

Idyllwild usually has the most precipitation in January, February and December, with an average of 6 rainy days and 64 mm (2.5 inches) of precipitation per month.The driest months in Idyllwild are June, August and September. On average, 7 mm (0.3 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Idyllwild, California, 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) 70 (2.8) 57 (2.3) 25 (1.0) 13 (0.5) 3 (0.1) 19 (0.7) 11 (0.4) 7 (0.3) 14 (0.6) 25 (1.0) 58 (2.3)
Average precipitation days (≥ 1 mm) 6 7 10 3 3 0 4 3 2 3 2 5

Monthly sunshine hours in Idyllwild, California, United States §

The sunniest months in Idyllwild are May, June and July, when the sun shines an average of 12 hours 17 minutes a day.Least sunny months in Idyllwild: January, February and December receive an average of 7 hours 25 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Idyllwild, California, 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 193 249 301 330 372 376 381 362 322 301 260 231
Mean daily daylight hours 10h 11m 10h 58m 11h 59m 13h 2m 13h 55m 14h 20m 14h 6m 13h 19m 12h 19m 11h 17m 10h 23m 9h 56m

Solar UV radiation in Idyllwild, California, United States §

Idyllwild experiences the highest level of ultraviolet (UV) radiation in May, June and July, when the maximum UV index can reach values of 12 - 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 5. For more detailed information, check out our hourly Idyllwild UV Index data.

Average daily maximum UV levels by month for Idyllwild, California, 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 6 9 11 12 12 12 11 10 8 5 4