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Monthly climate in Forks, Washington, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Forks features a oceanic climate (Cfb).Temperatures typically range between 5 °C (41 °F) and 15 °C (59 °F) through the year, but rarely can drop to -4 °C (24 °F) or can rise to as high as 34 °C (93 °F).The average annual precipitation amounts to about 1962 mm (77.2 inches) and receives 163 rainy days on the 1 mm (0.04 inches) threshold annually.Forks enjoys an average of 2554 hours of sunshine throughout the year, and daylight varies from 8 hours 26 minutes to 15 hours 57 minutes per day.

Monthly average temperatures in Forks, Washington, United States §

The warmest months in Forks are July, August and September, with daily mean temperatures ranging from 14 to 15 °C (58 - 59 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 5 to 6 °C (41 - 44 °F) throughout the day. On average each year, Forks experiences 3 days above 25 °C (77.0 °F) and 7 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Forks, Washington, 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 14°C
(57°F)		 13°C
(55°F)		 20°C
(69°F)		 22°C
(72°F)		 24°C
(76°F)		 34°C
(93°F)		 24°C
(76°F)		 30°C
(86°F)		 27°C
(82°F)		 19°C
(67°F)		 16°C
(60°F)		 13°C
(56°F)
Mean maximum 12°C
(54°F)		 11°C
(52°F)		 14°C
(58°F)		 18°C
(64°F)		 21°C
(69°F)		 24°C
(75°F)		 22°C
(72°F)		 27°C
(81°F)		 24°C
(75°F)		 17°C
(63°F)		 14°C
(58°F)		 12°C
(54°F)
Average high 8°C
(47°F)		 7°C
(45°F)		 9°C
(49°F)		 11°C
(53°F)		 14°C
(57°F)		 16°C
(61°F)		 18°C
(64°F)		 19°C
(66°F)		 17°C
(63°F)		 13°C
(56°F)		 10°C
(51°F)		 8°C
(47°F)
Daily mean 6°C
(44°F)		 5°C
(41°F)		 7°C
(44°F)		 9°C
(48°F)		 11°C
(52°F)		 13°C
(56°F)		 14°C
(58°F)		 15°C
(59°F)		 14°C
(58°F)		 11°C
(51°F)		 8°C
(47°F)		 6°C
(44°F)
Average low 5°C
(41°F)		 3°C
(38°F)		 4°C
(40°F)		 6°C
(43°F)		 9°C
(48°F)		 11°C
(51°F)		 12°C
(53°F)		 12°C
(54°F)		 12°C
(53°F)		 8°C
(47°F)		 7°C
(44°F)		 5°C
(41°F)
Mean minimum 0°C
(32°F)		 -1°C
(31°F)		 1°C
(34°F)		 3°C
(37°F)		 6°C
(42°F)		 7°C
(46°F)		 10°C
(50°F)		 10°C
(50°F)		 8°C
(46°F)		 4°C
(39°F)		 2°C
(36°F)		 -1°C
(31°F)
Minimum -2°C
(28°F)		 -3°C
(28°F)		 -0°C
(32°F)		 2°C
(35°F)		 4°C
(40°F)		 6°C
(44°F)		 9°C
(48°F)		 9°C
(49°F)		 6°C
(43°F)		 3°C
(37°F)		 1°C
(33°F)		 -4°C
(24°F)

Compare climate in Forks with other places

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

Monthly average precipitation in Forks, Washington, United States §

Forks usually has the most precipitation in January, November and December, with an average of 19 rainy days and 304 mm (12.0 inches) of precipitation per month.The driest months in Forks are June, July and August. On average, 37 mm (1.4 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Forks, Washington, 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) 281 (11.1) 189 (7.5) 181 (7.1) 153 (6.0) 68 (2.7) 61 (2.4) 23 (0.9) 25 (1.0) 131 (5.1) 219 (8.6) 336 (13.2) 293 (11.5)
Average precipitation days (≥ 1 mm) 18 18 18 16 9 10 5 4 11 15 19 20

Monthly sunshine hours in Forks, Washington, United States §

The sunniest months in Forks are June, July and August, when the sun shines an average of 10 hours 32 minutes a day.Least sunny months in Forks: January, November and December receive an average of 3 hours 9 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Forks, Washington, 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 76 134 206 226 299 318 339 311 239 187 116 98
Mean daily daylight hours 8h 52m 10h 15m 11h 57m 13h 41m 15h 11m 15h 57m 15h 31m 14h 10m 12h 30m 10h 46m 9h 13m 8h 26m

Solar UV radiation in Forks, Washington, United States §

Forks experiences the highest level of ultraviolet (UV) radiation in June, July and August, when the maximum UV index can reach values of 8 - 9, which corresponds to the Very High category of sun exposure.January, November and December are in the Low exposure category. In these months, the maximum values of the UV index do not exceed 2. For more detailed information, check out our hourly Forks UV Index data.

Average daily maximum UV levels by month for Forks, Washington, 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) 2 3 5 6 8 9 9 8 7 5 2 2