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Monthly climate in Port Townsend, Washington, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Port Townsend features a warm-summer Mediterranean climate (Csb).Temperatures typically range between 5 °C (41 °F) and 17 °C (63 °F) through the year, but rarely can drop to -6 °C (22 °F) or can rise to as high as 31 °C (88 °F).The average annual precipitation amounts to about 1557 mm (61.3 inches) and receives 192 rainy days on the 1 mm (0.04 inches) threshold annually.Port Townsend enjoys an average of 2756 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 Port Townsend, Washington, United States §

The warmest months in Port Townsend are July, August and September, with daily mean temperatures ranging from 15 to 17 °C (59 - 63 °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 - 43 °F) throughout the day. On average each year, Port Townsend experiences 1 days above 25 °C (77.0 °F) and 6 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Port Townsend, 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
(55°F)		 13°C
(55°F)		 19°C
(67°F)		 20°C
(68°F)		 22°C
(71°F)		 31°C
(88°F)		 25°C
(77°F)		 27°C
(81°F)		 24°C
(76°F)		 21°C
(69°F)		 16°C
(61°F)		 13°C
(55°F)
Mean maximum 11°C
(52°F)		 11°C
(52°F)		 14°C
(58°F)		 17°C
(63°F)		 20°C
(69°F)		 23°C
(73°F)		 24°C
(75°F)		 25°C
(78°F)		 22°C
(73°F)		 17°C
(63°F)		 14°C
(58°F)		 11°C
(53°F)
Average high 7°C
(46°F)		 7°C
(44°F)		 9°C
(49°F)		 12°C
(53°F)		 15°C
(59°F)		 17°C
(63°F)		 19°C
(67°F)		 20°C
(68°F)		 17°C
(63°F)		 13°C
(55°F)		 10°C
(50°F)		 7°C
(45°F)
Daily mean 6°C
(43°F)		 5°C
(41°F)		 7°C
(45°F)		 9°C
(49°F)		 12°C
(54°F)		 15°C
(58°F)		 17°C
(62°F)		 17°C
(63°F)		 15°C
(59°F)		 11°C
(52°F)		 8°C
(47°F)		 6°C
(43°F)
Average low 5°C
(41°F)		 3°C
(38°F)		 5°C
(41°F)		 7°C
(45°F)		 10°C
(50°F)		 12°C
(54°F)		 14°C
(57°F)		 15°C
(59°F)		 13°C
(56°F)		 9°C
(49°F)		 7°C
(45°F)		 5°C
(41°F)
Mean minimum -0°C
(32°F)		 -2°C
(29°F)		 1°C
(35°F)		 3°C
(38°F)		 7°C
(44°F)		 9°C
(49°F)		 12°C
(54°F)		 12°C
(54°F)		 10°C
(50°F)		 5°C
(42°F)		 2°C
(37°F)		 -1°C
(31°F)
Minimum -4°C
(26°F)		 -6°C
(22°F)		 -0°C
(32°F)		 2°C
(37°F)		 5°C
(42°F)		 8°C
(47°F)		 11°C
(52°F)		 11°C
(52°F)		 9°C
(48°F)		 3°C
(38°F)		 1°C
(35°F)		 -5°C
(23°F)

Compare climate in Port Townsend with other places

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

Monthly average precipitation in Port Townsend, Washington, United States §

Port Townsend usually has the most precipitation in January, November and December, with an average of 19 rainy days and 178 mm (7.0 inches) of precipitation per month.The driest months in Port Townsend are May, July and August. On average, 67 mm (2.6 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Port Townsend, 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) 160 (6.3) 157 (6.2) 131 (5.1) 124 (4.9) 91 (3.6) 125 (4.9) 58 (2.3) 51 (2.0) 129 (5.1) 155 (6.1) 187 (7.4) 187 (7.4)
Average precipitation days (≥ 1 mm) 17 21 18 16 13 15 10 8 15 18 20 21

Monthly sunshine hours in Port Townsend, Washington, United States §

The sunniest months in Port Townsend are June, July and August, when the sun shines an average of 11 hours 34 minutes a day.Least sunny months in Port Townsend: 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 Port Townsend, 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 83 140 213 242 328 338 381 344 262 196 126 97
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 14m 8h 26m

Solar UV radiation in Port Townsend, Washington, United States §

Port Townsend 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 Port Townsend UV Index data.

Average daily maximum UV levels by month for Port Townsend, 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