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Monthly climate in Sequim, Washington, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Sequim features a warm-summer Mediterranean climate (Csb).Temperatures typically range between 2 °C (36 °F) and 16 °C (61 °F) through the year, but rarely can drop to -12 °C (11 °F) or can rise to as high as 32 °C (90 °F).The average annual precipitation amounts to about 1542 mm (60.7 inches) and receives 195 rainy days on the 1 mm (0.04 inches) threshold annually.Sequim enjoys an average of 2766 hours of sunshine throughout the year, and daylight varies from 8 hours 24 minutes to 15 hours 58 minutes per day.

Monthly average temperatures in Sequim, Washington, United States §

The warmest months in Sequim are July, August and September, with daily mean temperatures ranging from 13 to 16 °C (56 - 61 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 2 to 3 °C (36 - 38 °F) throughout the day. On average each year, Sequim experiences 2 days above 25 °C (77.0 °F) and 36 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Sequim, 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 12°C
(53°F)		 11°C
(52°F)		 17°C
(64°F)		 20°C
(69°F)		 22°C
(71°F)		 32°C
(90°F)		 26°C
(78°F)		 27°C
(82°F)		 25°C
(77°F)		 21°C
(70°F)		 15°C
(59°F)		 11°C
(52°F)
Mean maximum 9°C
(48°F)		 9°C
(49°F)		 13°C
(55°F)		 16°C
(61°F)		 20°C
(68°F)		 23°C
(73°F)		 24°C
(75°F)		 26°C
(79°F)		 22°C
(72°F)		 16°C
(62°F)		 13°C
(55°F)		 10°C
(50°F)
Average high 5°C
(41°F)		 4°C
(40°F)		 7°C
(45°F)		 10°C
(50°F)		 14°C
(57°F)		 16°C
(61°F)		 19°C
(66°F)		 20°C
(68°F)		 16°C
(62°F)		 11°C
(53°F)		 8°C
(46°F)		 5°C
(41°F)
Daily mean 3°C
(38°F)		 2°C
(36°F)		 4°C
(40°F)		 7°C
(44°F)		 11°C
(51°F)		 13°C
(56°F)		 15°C
(60°F)		 16°C
(61°F)		 13°C
(56°F)		 9°C
(48°F)		 6°C
(42°F)		 3°C
(38°F)
Average low 2°C
(35°F)		 0°C
(32°F)		 2°C
(35°F)		 4°C
(39°F)		 8°C
(46°F)		 10°C
(50°F)		 12°C
(54°F)		 13°C
(56°F)		 11°C
(52°F)		 6°C
(43°F)		 4°C
(39°F)		 1°C
(35°F)
Mean minimum -5°C
(24°F)		 -7°C
(20°F)		 -4°C
(26°F)		 -1°C
(31°F)		 3°C
(38°F)		 6°C
(43°F)		 9°C
(49°F)		 9°C
(49°F)		 6°C
(44°F)		 2°C
(35°F)		 -1°C
(30°F)		 -6°C
(22°F)
Minimum -8°C
(18°F)		 -12°C
(11°F)		 -6°C
(21°F)		 -3°C
(28°F)		 2°C
(36°F)		 5°C
(41°F)		 8°C
(47°F)		 8°C
(47°F)		 5°C
(41°F)		 0°C
(33°F)		 -5°C
(23°F)		 -11°C
(13°F)

Compare climate in Sequim with other places

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

Monthly average precipitation in Sequim, Washington, United States §

Sequim usually has the most precipitation in January, November and December, with an average of 19 rainy days and 191 mm (7.5 inches) of precipitation per month.The driest months in Sequim are May, July and August. On average, 62 mm (2.5 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Sequim, 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) 182 (7.2) 150 (5.9) 128 (5.1) 119 (4.7) 93 (3.7) 118 (4.6) 49 (1.9) 45 (1.8) 122 (4.8) 143 (5.6) 199 (7.8) 193 (7.6)
Average precipitation days (≥ 1 mm) 17 20 19 18 14 16 10 9 15 17 20 20

Monthly sunshine hours in Sequim, Washington, United States §

The sunniest months in Sequim are June, July and August, when the sun shines an average of 11 hours 37 minutes a day.Least sunny months in Sequim: January, November and December receive an average of 3 hours 20 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Sequim, 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 82 143 215 241 329 343 381 344 261 198 126 97
Mean daily daylight hours 8h 51m 10h 14m 11h 57m 13h 42m 15h 12m 15h 58m 15h 32m 14h 11m 12h 30m 10h 45m 9h 13m 8h 24m

Solar UV radiation in Sequim, Washington, United States §

Sequim 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, February 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 Sequim UV Index data.

Average daily maximum UV levels by month for Sequim, 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 3 2