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Monthly climate in White Swan, Washington, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification White Swan features a warm-summer Mediterranean climate (Csb).Temperatures typically range between 0 °C (33 °F) and 24 °C (75 °F) through the year, but rarely can drop to -20 °C (-3 °F) or can rise to as high as 42 °C (109 °F).The average annual precipitation amounts to about 493 mm (19.4 inches) and receives 81 rainy days on the 1 mm (0.04 inches) threshold annually.White Swan enjoys an average of 3069 hours of sunshine throughout the year, and daylight varies from 8 hours 36 minutes to 15 hours 45 minutes per day.

Monthly average temperatures in White Swan, Washington, United States §

The warmest months in White Swan are June, July and August, with daily mean temperatures ranging from 20 to 24 °C (67 - 75 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 0 to 1 °C (33 - 34 °F) throughout the day. On average each year, White Swan experiences 87 days above 25 °C (77.0 °F) and 102 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in White Swan, 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 13°C
(56°F)		 17°C
(64°F)		 19°C
(67°F)		 29°C
(85°F)		 33°C
(92°F)		 42°C
(109°F)		 41°C
(106°F)		 40°C
(105°F)		 37°C
(98°F)		 30°C
(86°F)		 19°C
(66°F)		 18°C
(65°F)
Mean maximum 10°C
(51°F)		 13°C
(56°F)		 17°C
(64°F)		 24°C
(75°F)		 30°C
(87°F)		 34°C
(93°F)		 38°C
(100°F)		 38°C
(101°F)		 34°C
(93°F)		 25°C
(77°F)		 18°C
(65°F)		 12°C
(54°F)
Average high 4°C
(39°F)		 6°C
(42°F)		 11°C
(52°F)		 16°C
(60°F)		 22°C
(72°F)		 27°C
(80°F)		 32°C
(90°F)		 31°C
(88°F)		 25°C
(77°F)		 16°C
(61°F)		 9°C
(48°F)		 4°C
(40°F)
Daily mean 0°C
(33°F)		 1°C
(33°F)		 5°C
(41°F)		 9°C
(49°F)		 15°C
(60°F)		 20°C
(67°F)		 24°C
(75°F)		 23°C
(74°F)		 17°C
(64°F)		 10°C
(50°F)		 4°C
(40°F)		 1°C
(34°F)
Average low -3°C
(27°F)		 -4°C
(26°F)		 -0°C
(32°F)		 3°C
(38°F)		 8°C
(47°F)		 12°C
(54°F)		 14°C
(58°F)		 14°C
(58°F)		 10°C
(50°F)		 4°C
(39°F)		 0°C
(33°F)		 -2°C
(29°F)
Mean minimum -11°C
(13°F)		 -13°C
(9°F)		 -7°C
(20°F)		 -3°C
(26°F)		 1°C
(35°F)		 6°C
(44°F)		 10°C
(49°F)		 8°C
(47°F)		 4°C
(39°F)		 -3°C
(26°F)		 -5°C
(22°F)		 -8°C
(18°F)
Minimum -20°C
(-3°F)		 -19°C
(-2°F)		 -13°C
(9°F)		 -9°C
(16°F)		 0°C
(32°F)		 5°C
(41°F)		 9°C
(48°F)		 6°C
(43°F)		 3°C
(37°F)		 -6°C
(21°F)		 -8°C
(17°F)		 -11°C
(13°F)

Compare climate in White Swan with other places

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

Monthly average precipitation in White Swan, Washington, United States §

White Swan usually has the most precipitation in January, February and December, with an average of 12 rainy days and 89 mm (3.5 inches) of precipitation per month.The driest months in White Swan are June, July and August. On average, 4 mm (0.2 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in White Swan, 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) 88 (3.5) 93 (3.6) 41 (1.6) 31 (1.2) 15 (0.6) 8 (0.3) 1 (0.0) 4 (0.1) 15 (0.6) 49 (1.9) 62 (2.4) 87 (3.4)
Average precipitation days (≥ 1 mm) 13 13 9 6 4 2 0 1 3 7 11 12

Monthly sunshine hours in White Swan, Washington, United States §

The sunniest months in White Swan are June, July and August, when the sun shines an average of 12 hours 32 minutes a day.Least sunny months in White Swan: January, February and December receive an average of 4 hours 5 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in White Swan, 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 97 152 232 278 349 374 412 366 290 237 155 122
Mean daily daylight hours 9h 2m 10h 19m 11h 57m 13h 37m 15h 2m 15h 45m 15h 21m 14h 5m 12h 28m 10h 49m 9h 22m 8h 36m

Solar UV radiation in White Swan, Washington, United States §

White Swan experiences the highest level of ultraviolet (UV) radiation in June, July and August, when the maximum UV index can reach values of 9 - 10, which corresponds to the Very High category of sun exposure.January, November and December are in the Low / Moderate exposure category. In these months, the maximum values of the UV index do not exceed 3. For more detailed information, check out our hourly White Swan UV Index data.

Average daily maximum UV levels by month for White Swan, 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 4 6 7 9 10 10 9 8 5 3 2