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Monthly climate in Arlington Heights, Washington, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Arlington Heights features a warm-summer Mediterranean climate (Csb).Temperatures typically range between 2 °C (36 °F) and 18 °C (64 °F) through the year, but rarely can drop to -17 °C (2 °F) or can rise to as high as 41 °C (107 °F).The average annual precipitation amounts to about 2648 mm (104.3 inches) and receives 176 rainy days on the 1 mm (0.04 inches) threshold annually.Arlington Heights enjoys an average of 2644 hours of sunshine throughout the year, and daylight varies from 8 hours 23 minutes to 15 hours 59 minutes per day.

Monthly average temperatures in Arlington Heights, Washington, United States §

The warmest months in Arlington Heights are June, July and August, with daily mean temperatures ranging from 15 to 18 °C (59 - 64 °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 - 37 °F) throughout the day. On average each year, Arlington Heights experiences 24 days above 25 °C (77.0 °F) and 65 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Arlington Heights, 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 14°C
(57°F)		 13°C
(55°F)		 25°C
(77°F)		 27°C
(81°F)		 29°C
(84°F)		 41°C
(107°F)		 34°C
(93°F)		 35°C
(95°F)		 32°C
(90°F)		 24°C
(75°F)		 17°C
(62°F)		 12°C
(54°F)
Mean maximum 11°C
(52°F)		 11°C
(52°F)		 17°C
(63°F)		 22°C
(72°F)		 26°C
(79°F)		 29°C
(85°F)		 31°C
(88°F)		 33°C
(92°F)		 28°C
(83°F)		 19°C
(67°F)		 15°C
(59°F)		 10°C
(51°F)
Average high 6°C
(43°F)		 5°C
(42°F)		 9°C
(49°F)		 13°C
(56°F)		 17°C
(63°F)		 19°C
(67°F)		 23°C
(73°F)		 23°C
(75°F)		 19°C
(67°F)		 13°C
(55°F)		 9°C
(48°F)		 5°C
(42°F)
Daily mean 3°C
(37°F)		 2°C
(36°F)		 5°C
(41°F)		 8°C
(47°F)		 12°C
(54°F)		 15°C
(59°F)		 17°C
(63°F)		 18°C
(64°F)		 14°C
(58°F)		 8°C
(47°F)		 5°C
(42°F)		 2°C
(37°F)
Average low 0°C
(33°F)		 -1°C
(30°F)		 1°C
(34°F)		 4°C
(39°F)		 7°C
(46°F)		 10°C
(50°F)		 12°C
(53°F)		 12°C
(54°F)		 10°C
(50°F)		 4°C
(40°F)		 2°C
(36°F)		 -0°C
(32°F)
Mean minimum -9°C
(17°F)		 -11°C
(12°F)		 -6°C
(22°F)		 -2°C
(29°F)		 2°C
(37°F)		 6°C
(42°F)		 8°C
(47°F)		 7°C
(45°F)		 4°C
(40°F)		 -2°C
(28°F)		 -5°C
(24°F)		 -10°C
(15°F)
Minimum -17°C
(2°F)		 -17°C
(2°F)		 -12°C
(11°F)		 -3°C
(26°F)		 1°C
(34°F)		 4°C
(40°F)		 7°C
(45°F)		 5°C
(42°F)		 3°C
(37°F)		 -5°C
(23°F)		 -7°C
(19°F)		 -16°C
(3°F)

Compare climate in Arlington Heights with other places

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

Monthly average precipitation in Arlington Heights, Washington, United States §

Arlington Heights usually has the most precipitation in February, November and December, with an average of 20 rainy days and 365 mm (14.4 inches) of precipitation per month.The driest months in Arlington Heights are June, July and August. On average, 60 mm (2.4 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Arlington Heights, 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) 314 (12.4) 325 (12.8) 256 (10.1) 214 (8.4) 113 (4.4) 104 (4.1) 37 (1.5) 38 (1.5) 175 (6.9) 302 (11.9) 404 (15.9) 365 (14.4)
Average precipitation days (≥ 1 mm) 16 21 18 17 12 11 6 6 12 16 20 21

Monthly sunshine hours in Arlington Heights, Washington, United States §

The sunniest months in Arlington Heights are June, July and August, when the sun shines an average of 11 hours 14 minutes a day.Least sunny months in Arlington Heights: January, November and December receive an average of 3 hours 10 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Arlington Heights, 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 84 126 200 237 316 321 374 338 256 180 115 91
Mean daily daylight hours 8h 50m 10h 13m 11h 57m 13h 42m 15h 13m 15h 59m 15h 33m 14h 12m 12h 30m 10h 45m 9h 12m 8h 23m

Solar UV radiation in Arlington Heights, Washington, United States §

Arlington Heights 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 Arlington Heights UV Index data.

Average daily maximum UV levels by month for Arlington Heights, 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 1