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Monthly climate in Dallesport, Washington, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Dallesport features a warm-summer Mediterranean climate (Csb).Temperatures typically range between 1 °C (34 °F) and 22 °C (72 °F) through the year, but rarely can drop to -22 °C (-7 °F) or can rise to as high as 45 °C (113 °F).The average annual precipitation amounts to about 741 mm (29.2 inches) and receives 111 rainy days on the 1 mm (0.04 inches) threshold annually.Dallesport enjoys an average of 3063 hours of sunshine throughout the year, and daylight varies from 8 hours 45 minutes to 15 hours 36 minutes per day.

Monthly average temperatures in Dallesport, Washington, United States §

The warmest months in Dallesport are June, July and August, with daily mean temperatures ranging from 18 to 22 °C (64 - 72 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 1 to 2 °C (34 - 35 °F) throughout the day. On average each year, Dallesport experiences 69 days above 25 °C (77.0 °F) and 75 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Dallesport, 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
(54°F)		 17°C
(62°F)		 19°C
(66°F)		 27°C
(81°F)		 32°C
(90°F)		 45°C
(113°F)		 40°C
(104°F)		 40°C
(104°F)		 37°C
(100°F)		 30°C
(86°F)		 20°C
(68°F)		 18°C
(65°F)
Mean maximum 10°C
(51°F)		 12°C
(54°F)		 17°C
(63°F)		 23°C
(73°F)		 29°C
(84°F)		 34°C
(94°F)		 37°C
(98°F)		 38°C
(100°F)		 33°C
(92°F)		 23°C
(74°F)		 17°C
(64°F)		 13°C
(55°F)
Average high 4°C
(40°F)		 6°C
(42°F)		 10°C
(50°F)		 14°C
(58°F)		 20°C
(67°F)		 24°C
(75°F)		 29°C
(85°F)		 30°C
(85°F)		 24°C
(75°F)		 16°C
(60°F)		 9°C
(48°F)		 4°C
(40°F)
Daily mean 1°C
(34°F)		 2°C
(35°F)		 5°C
(41°F)		 9°C
(48°F)		 14°C
(57°F)		 18°C
(64°F)		 22°C
(71°F)		 22°C
(72°F)		 17°C
(63°F)		 10°C
(50°F)		 5°C
(41°F)		 1°C
(35°F)
Average low -2°C
(29°F)		 -2°C
(29°F)		 1°C
(33°F)		 4°C
(39°F)		 8°C
(46°F)		 11°C
(52°F)		 13°C
(56°F)		 14°C
(57°F)		 10°C
(50°F)		 5°C
(41°F)		 1°C
(35°F)		 -1°C
(30°F)
Mean minimum -10°C
(14°F)		 -11°C
(13°F)		 -6°C
(21°F)		 -3°C
(27°F)		 2°C
(35°F)		 6°C
(42°F)		 8°C
(47°F)		 7°C
(45°F)		 4°C
(40°F)		 -3°C
(27°F)		 -5°C
(24°F)		 -9°C
(16°F)
Minimum -22°C
(-7°F)		 -17°C
(2°F)		 -15°C
(6°F)		 -7°C
(19°F)		 0°C
(33°F)		 5°C
(41°F)		 7°C
(45°F)		 5°C
(42°F)		 2°C
(36°F)		 -8°C
(19°F)		 -7°C
(20°F)		 -15°C
(6°F)

Compare climate in Dallesport with other places

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

Monthly average precipitation in Dallesport, Washington, United States §

Dallesport usually has the most precipitation in January, February and December, with an average of 15 rainy days and 117 mm (4.6 inches) of precipitation per month.The driest months in Dallesport are June, July and August. On average, 9 mm (0.4 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Dallesport, 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) 112 (4.4) 123 (4.8) 75 (3.0) 69 (2.7) 31 (1.2) 22 (0.9) 2 (0.1) 4 (0.2) 34 (1.4) 58 (2.3) 93 (3.6) 118 (4.6)
Average precipitation days (≥ 1 mm) 15 16 13 12 8 5 0 1 5 8 13 15

Monthly sunshine hours in Dallesport, Washington, United States §

The sunniest months in Dallesport are June, July and August, when the sun shines an average of 12 hours 32 minutes a day.Least sunny months in Dallesport: 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 Dallesport, 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 99 147 227 272 349 374 411 367 290 237 157 124
Mean daily daylight hours 9h 9m 10h 24m 11h 57m 13h 33m 14h 55m 15h 36m 15h 13m 13h 59m 12h 27m 10h 52m 9h 28m 8h 45m

Solar UV radiation in Dallesport, Washington, United States §

Dallesport 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 Dallesport UV Index data.

Average daily maximum UV levels by month for Dallesport, 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