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Monthly climate in Millwood, Washington, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Millwood features a warm-summer Mediterranean climate (Csb).Temperatures typically range between -1 °C (30 °F) and 23 °C (74 °F) through the year, but rarely can drop to -22 °C (-7 °F) or can rise to as high as 44 °C (111 °F).The average annual precipitation amounts to about 640 mm (25.2 inches) and receives 107 rainy days on the 1 mm (0.04 inches) threshold annually.Millwood enjoys an average of 2926 hours of sunshine throughout the year, and daylight varies from 8 hours 28 minutes to 15 hours 54 minutes per day.

Monthly average temperatures in Millwood, Washington, United States §

The warmest months in Millwood are June, July and August, with daily mean temperatures ranging from 19 to 23 °C (66 - 74 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -1 to 0 °C (30 - 32 °F) throughout the day. On average each year, Millwood experiences 69 days above 25 °C (77.0 °F) and 108 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Millwood, 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 10°C
(51°F)		 15°C
(59°F)		 19°C
(67°F)		 28°C
(82°F)		 31°C
(89°F)		 44°C
(111°F)		 42°C
(107°F)		 40°C
(104°F)		 35°C
(95°F)		 27°C
(81°F)		 16°C
(60°F)		 16°C
(61°F)
Mean maximum 8°C
(47°F)		 10°C
(51°F)		 16°C
(61°F)		 22°C
(72°F)		 28°C
(83°F)		 32°C
(90°F)		 37°C
(100°F)		 39°C
(102°F)		 32°C
(90°F)		 22°C
(71°F)		 14°C
(58°F)		 10°C
(50°F)
Average high 2°C
(35°F)		 3°C
(37°F)		 9°C
(48°F)		 13°C
(56°F)		 20°C
(68°F)		 24°C
(76°F)		 30°C
(87°F)		 30°C
(86°F)		 23°C
(73°F)		 14°C
(57°F)		 6°C
(44°F)		 2°C
(36°F)
Daily mean -1°C
(30°F)		 -1°C
(30°F)		 4°C
(39°F)		 8°C
(47°F)		 14°C
(57°F)		 19°C
(66°F)		 23°C
(74°F)		 23°C
(73°F)		 16°C
(62°F)		 8°C
(47°F)		 3°C
(38°F)		 -0°C
(32°F)
Average low -4°C
(26°F)		 -5°C
(24°F)		 -1°C
(31°F)		 3°C
(37°F)		 8°C
(47°F)		 12°C
(54°F)		 15°C
(59°F)		 15°C
(59°F)		 10°C
(51°F)		 3°C
(38°F)		 0°C
(32°F)		 -3°C
(27°F)
Mean minimum -15°C
(5°F)		 -15°C
(6°F)		 -9°C
(16°F)		 -3°C
(27°F)		 2°C
(35°F)		 7°C
(44°F)		 10°C
(51°F)		 9°C
(49°F)		 4°C
(40°F)		 -4°C
(25°F)		 -7°C
(20°F)		 -12°C
(11°F)
Minimum -22°C
(-7°F)		 -20°C
(-5°F)		 -16°C
(3°F)		 -5°C
(23°F)		 -0°C
(32°F)		 6°C
(43°F)		 9°C
(48°F)		 8°C
(47°F)		 2°C
(35°F)		 -10°C
(14°F)		 -10°C
(15°F)		 -20°C
(-5°F)

Compare climate in Millwood with other places

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

Monthly average precipitation in Millwood, Washington, United States §

Millwood usually has the most precipitation in January, November and December, with an average of 13 rainy days and 84 mm (3.3 inches) of precipitation per month.The driest months in Millwood are June, July and August. On average, 13 mm (0.5 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Millwood, 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) 82 (3.2) 74 (2.9) 65 (2.6) 60 (2.4) 53 (2.1) 24 (0.9) 4 (0.2) 10 (0.4) 35 (1.4) 62 (2.4) 88 (3.5) 83 (3.2)
Average precipitation days (≥ 1 mm) 13 14 12 12 8 4 1 2 5 9 14 13

Monthly sunshine hours in Millwood, Washington, United States §

The sunniest months in Millwood are June, July and August, when the sun shines an average of 12 hours 11 minutes a day.Least sunny months in Millwood: January, February and December receive an average of 3 hours 38 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Millwood, 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 90 139 218 267 333 355 412 353 285 227 141 101
Mean daily daylight hours 8h 54m 10h 15m 11h 57m 13h 40m 15h 9m 15h 54m 15h 29m 14h 9m 12h 29m 10h 46m 9h 15m 8h 28m

Solar UV radiation in Millwood, Washington, United States §

Millwood 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 Millwood UV Index data.

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