nomadseason

Monthly climate in Ellensburg, Washington, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Ellensburg features a cold semi-arid climate (BSk).Temperatures typically range between -2 °C (29 °F) and 21 °C (70 °F) through the year, but rarely can drop to -22 °C (-8 °F) or can rise to as high as 40 °C (105 °F).The average annual precipitation amounts to about 482 mm (19.0 inches) and receives 92 rainy days on the 1 mm (0.04 inches) threshold annually.Ellensburg enjoys an average of 3104 hours of sunshine throughout the year, and daylight varies from 8 hours 33 minutes to 15 hours 48 minutes per day.

Monthly average temperatures in Ellensburg, Washington, United States §

The warmest months in Ellensburg are June, July and August, with daily mean temperatures ranging from 17 to 21 °C (63 - 70 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -2 to -1 °C (29 - 31 °F) throughout the day. On average each year, Ellensburg experiences 61 days above 25 °C (77.0 °F) and 119 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Ellensburg, 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 9°C
(48°F)		 14°C
(58°F)		 17°C
(64°F)		 26°C
(79°F)		 30°C
(86°F)		 40°C
(105°F)		 38°C
(100°F)		 37°C
(99°F)		 35°C
(95°F)		 28°C
(82°F)		 17°C
(62°F)		 15°C
(60°F)
Mean maximum 7°C
(44°F)		 10°C
(50°F)		 15°C
(60°F)		 21°C
(70°F)		 28°C
(82°F)		 31°C
(89°F)		 35°C
(96°F)		 36°C
(96°F)		 31°C
(88°F)		 21°C
(70°F)		 15°C
(60°F)		 9°C
(49°F)
Average high 1°C
(35°F)		 3°C
(38°F)		 8°C
(47°F)		 13°C
(56°F)		 19°C
(67°F)		 23°C
(74°F)		 28°C
(83°F)		 28°C
(83°F)		 22°C
(72°F)		 13°C
(56°F)		 6°C
(44°F)		 2°C
(36°F)
Daily mean -2°C
(29°F)		 -1°C
(31°F)		 3°C
(38°F)		 8°C
(46°F)		 13°C
(56°F)		 17°C
(63°F)		 21°C
(70°F)		 21°C
(69°F)		 15°C
(60°F)		 8°C
(46°F)		 2°C
(37°F)		 -1°C
(31°F)
Average low -4°C
(25°F)		 -4°C
(25°F)		 -1°C
(30°F)		 2°C
(36°F)		 7°C
(45°F)		 10°C
(51°F)		 13°C
(56°F)		 13°C
(56°F)		 9°C
(49°F)		 3°C
(37°F)		 -1°C
(31°F)		 -3°C
(27°F)
Mean minimum -12°C
(10°F)		 -12°C
(11°F)		 -8°C
(17°F)		 -4°C
(25°F)		 1°C
(34°F)		 5°C
(41°F)		 8°C
(47°F)		 7°C
(45°F)		 3°C
(38°F)		 -4°C
(25°F)		 -7°C
(20°F)		 -9°C
(16°F)
Minimum -22°C
(-8°F)		 -17°C
(2°F)		 -15°C
(6°F)		 -10°C
(14°F)		 -0°C
(32°F)		 3°C
(38°F)		 7°C
(45°F)		 6°C
(43°F)		 1°C
(34°F)		 -9°C
(17°F)		 -9°C
(17°F)		 -12°C
(11°F)

Compare climate in Ellensburg with other places

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

Monthly average precipitation in Ellensburg, Washington, United States §

Ellensburg usually has the most precipitation in January, February and December, with an average of 13 rainy days and 74 mm (2.9 inches) of precipitation per month.The driest months in Ellensburg are June, July and August. On average, 7 mm (0.3 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Ellensburg, 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) 75 (2.9) 75 (3.0) 44 (1.7) 38 (1.5) 23 (0.9) 13 (0.5) 1 (0.1) 5 (0.2) 24 (1.0) 53 (2.1) 58 (2.3) 72 (2.8)
Average precipitation days (≥ 1 mm) 14 13 10 9 6 4 0 1 4 7 12 12

Monthly sunshine hours in Ellensburg, Washington, United States §

The sunniest months in Ellensburg are June, July and August, when the sun shines an average of 12 hours 37 minutes a day.Least sunny months in Ellensburg: January, November and December receive an average of 3 hours 56 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Ellensburg, 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 90 161 243 289 358 379 417 364 289 237 154 118
Mean daily daylight hours 8h 59m 10h 18m 11h 57m 13h 38m 15h 5m 15h 48m 15h 24m 14h 6m 12h 29m 10h 48m 9h 19m 8h 33m

Solar UV radiation in Ellensburg, Washington, United States §

Ellensburg 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 Ellensburg UV Index data.

Average daily maximum UV levels by month for Ellensburg, 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