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Monthly climate in Birch Bay, Washington, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Birch Bay features a warm-summer Mediterranean climate (Csb).Temperatures typically range between 4 °C (39 °F) and 19 °C (66 °F) through the year, but rarely can drop to -13 °C (9 °F) or can rise to as high as 41 °C (106 °F).The average annual precipitation amounts to about 1743 mm (68.6 inches) and receives 158 rainy days on the 1 mm (0.04 inches) threshold annually.Birch Bay enjoys an average of 2723 hours of sunshine throughout the year, and daylight varies from 8 hours 17 minutes to 16 hours 7 minutes per day.

Monthly average temperatures in Birch Bay, Washington, United States §

The warmest months in Birch Bay are June, July and August, with daily mean temperatures ranging from 16 to 19 °C (61 - 66 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 4 to 4 °C (39 - 40 °F) throughout the day. On average each year, Birch Bay experiences 23 days above 25 °C (77.0 °F) and 25 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Birch Bay, 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)		 13°C
(55°F)		 23°C
(74°F)		 25°C
(78°F)		 28°C
(82°F)		 41°C
(106°F)		 33°C
(91°F)		 36°C
(98°F)		 33°C
(91°F)		 21°C
(71°F)		 17°C
(62°F)		 13°C
(55°F)
Mean maximum 11°C
(53°F)		 11°C
(53°F)		 16°C
(61°F)		 21°C
(69°F)		 25°C
(77°F)		 28°C
(83°F)		 30°C
(87°F)		 33°C
(91°F)		 28°C
(83°F)		 18°C
(65°F)		 15°C
(59°F)		 11°C
(52°F)
Average high 7°C
(45°F)		 7°C
(44°F)		 11°C
(51°F)		 14°C
(57°F)		 18°C
(64°F)		 20°C
(68°F)		 23°C
(74°F)		 24°C
(75°F)		 20°C
(68°F)		 14°C
(57°F)		 10°C
(50°F)		 6°C
(44°F)
Daily mean 4°C
(40°F)		 4°C
(39°F)		 7°C
(45°F)		 10°C
(50°F)		 13°C
(56°F)		 16°C
(61°F)		 18°C
(66°F)		 19°C
(66°F)		 16°C
(61°F)		 10°C
(51°F)		 7°C
(45°F)		 4°C
(40°F)
Average low 2°C
(37°F)		 1°C
(35°F)		 4°C
(39°F)		 6°C
(43°F)		 9°C
(49°F)		 12°C
(54°F)		 14°C
(57°F)		 14°C
(58°F)		 12°C
(54°F)		 7°C
(45°F)		 5°C
(41°F)		 2°C
(36°F)
Mean minimum -5°C
(23°F)		 -5°C
(24°F)		 -1°C
(30°F)		 2°C
(35°F)		 5°C
(42°F)		 8°C
(47°F)		 11°C
(52°F)		 10°C
(51°F)		 8°C
(47°F)		 2°C
(36°F)		 -1°C
(31°F)		 -5°C
(22°F)
Minimum -9°C
(16°F)		 -8°C
(18°F)		 -4°C
(25°F)		 -0°C
(32°F)		 4°C
(40°F)		 7°C
(46°F)		 10°C
(51°F)		 9°C
(48°F)		 7°C
(45°F)		 -0°C
(32°F)		 -2°C
(28°F)		 -13°C
(9°F)

Compare climate in Birch Bay with other places

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

Monthly average precipitation in Birch Bay, Washington, United States §

Birch Bay usually has the most precipitation in January, November and December, with an average of 18 rainy days and 251 mm (9.9 inches) of precipitation per month.The driest months in Birch Bay are June, July and August. On average, 37 mm (1.5 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Birch Bay, 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) 220 (8.6) 165 (6.5) 159 (6.3) 135 (5.3) 73 (2.9) 60 (2.3) 28 (1.1) 23 (0.9) 149 (5.9) 198 (7.8) 296 (11.7) 238 (9.4)
Average precipitation days (≥ 1 mm) 16 17 16 15 10 9 5 4 12 16 19 19

Monthly sunshine hours in Birch Bay, Washington, United States §

The sunniest months in Birch Bay are June, July and August, when the sun shines an average of 11 hours 40 minutes a day.Least sunny months in Birch Bay: January, November and December receive an average of 3 hours 18 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Birch Bay, 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 83 142 204 236 331 340 386 346 250 180 123 96
Mean daily daylight hours 8h 44m 10h 10m 11h 56m 13h 45m 15h 19m 16h 7m 15h 40m 14h 16m 12h 31m 10h 43m 9h 7m 8h 17m

Solar UV radiation in Birch Bay, Washington, United States §

Birch Bay 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 Birch Bay UV Index data.

Average daily maximum UV levels by month for Birch Bay, 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 4 6 7 8 9 8 6 4 2 1