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Monthly climate in Hayfork, California, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Hayfork features a warm-summer Mediterranean climate (Csb).Temperatures typically range between 3 °C (38 °F) and 23 °C (73 °F) through the year, but rarely can drop to -16 °C (4 °F) or can rise to as high as 38 °C (101 °F).The average annual precipitation amounts to about 905 mm (35.6 inches) and receives 85 rainy days on the 1 mm (0.04 inches) threshold annually.Hayfork enjoys an average of 3303 hours of sunshine throughout the year, and daylight varies from 9 hours 18 minutes to 15 hours 0 minutes per day.

Monthly average temperatures in Hayfork, California, United States §

The warmest months in Hayfork are July, August and September, with daily mean temperatures ranging from 18 to 23 °C (65 - 73 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 3 to 4 °C (38 - 40 °F) throughout the day. On average each year, Hayfork experiences 93 days above 25 °C (77.0 °F) and 65 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Hayfork, 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 17°C
(63°F)		 22°C
(71°F)		 23°C
(73°F)		 26°C
(79°F)		 31°C
(88°F)		 37°C
(98°F)		 37°C
(98°F)		 38°C
(101°F)		 37°C
(100°F)		 32°C
(90°F)		 25°C
(77°F)		 19°C
(67°F)
Mean maximum 16°C
(61°F)		 18°C
(65°F)		 21°C
(70°F)		 25°C
(77°F)		 29°C
(84°F)		 33°C
(91°F)		 35°C
(95°F)		 35°C
(96°F)		 34°C
(94°F)		 28°C
(82°F)		 22°C
(72°F)		 15°C
(59°F)
Average high 9°C
(48°F)		 10°C
(51°F)		 12°C
(53°F)		 16°C
(61°F)		 20°C
(68°F)		 26°C
(78°F)		 31°C
(88°F)		 30°C
(87°F)		 26°C
(80°F)		 20°C
(69°F)		 14°C
(57°F)		 8°C
(47°F)
Daily mean 4°C
(39°F)		 4°C
(40°F)		 6°C
(43°F)		 9°C
(49°F)		 13°C
(56°F)		 18°C
(65°F)		 23°C
(73°F)		 22°C
(72°F)		 18°C
(65°F)		 12°C
(55°F)		 7°C
(46°F)		 3°C
(38°F)
Average low 0°C
(33°F)		 -0°C
(32°F)		 1°C
(34°F)		 3°C
(38°F)		 7°C
(44°F)		 11°C
(51°F)		 14°C
(58°F)		 14°C
(58°F)		 11°C
(52°F)		 6°C
(43°F)		 3°C
(37°F)		 -0°C
(32°F)
Mean minimum -6°C
(22°F)		 -6°C
(21°F)		 -5°C
(24°F)		 -2°C
(29°F)		 -0°C
(32°F)		 2°C
(36°F)		 9°C
(48°F)		 10°C
(50°F)		 3°C
(38°F)		 0°C
(32°F)		 -5°C
(23°F)		 -6°C
(22°F)
Minimum -12°C
(10°F)		 -14°C
(8°F)		 -8°C
(17°F)		 -3°C
(26°F)		 -3°C
(27°F)		 1°C
(34°F)		 7°C
(44°F)		 8°C
(46°F)		 -0°C
(32°F)		 -2°C
(28°F)		 -16°C
(4°F)		 -10°C
(14°F)

Compare climate in Hayfork with other places

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

Monthly average precipitation in Hayfork, California, United States §

Hayfork usually has the most precipitation in January, February and March, with an average of 12 rainy days and 156 mm (6.1 inches) of precipitation per month.The driest months in Hayfork are June, July and August. On average, 6 mm (0.2 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Hayfork, 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) 171 (6.7) 165 (6.5) 133 (5.2) 77 (3.0) 53 (2.1) 12 (0.5) 2 (0.1) 3 (0.1) 13 (0.5) 49 (1.9) 101 (4.0) 125 (4.9)
Average precipitation days (≥ 1 mm) 13 11 14 9 6 3 0 1 3 5 8 12

Monthly sunshine hours in Hayfork, California, United States §

The sunniest months in Hayfork are June, July and August, when the sun shines an average of 12 hours 29 minutes a day.Least sunny months in Hayfork: January, February and December receive an average of 5 hours 18 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Hayfork, 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 122 192 244 283 351 383 402 362 310 275 205 168
Mean daily daylight hours 9h 38m 10h 40m 11h 58m 13h 19m 14h 27m 15h 0m 14h 42m 13h 41m 12h 24m 11h 3m 9h 54m 9h 18m

Solar UV radiation in Hayfork, California, United States §

Hayfork experiences the highest level of ultraviolet (UV) radiation in May, June and July, when the maximum UV index can reach values of 11 - 11, 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 Hayfork UV Index data.

Average daily maximum UV levels by month for Hayfork, 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) 3 5 7 9 11 11 11 10 9 7 4 3