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Monthly climate in Ritzville, Washington, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Ritzville features a cold semi-arid climate (BSk).Temperatures typically range between 0 °C (33 °F) and 26 °C (78 °F) through the year, but rarely can drop to -20 °C (-3 °F) or can rise to as high as 45 °C (114 °F).The average annual precipitation amounts to about 361 mm (14.2 inches) and receives 78 rainy days on the 1 mm (0.04 inches) threshold annually.Ritzville enjoys an average of 3146 hours of sunshine throughout the year, and daylight varies from 8 hours 32 minutes to 15 hours 50 minutes per day.

Monthly average temperatures in Ritzville, Washington, United States §

The warmest months in Ritzville are June, July and August, with daily mean temperatures ranging from 21 to 26 °C (70 - 78 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 0 to 1 °C (33 - 33 °F) throughout the day. On average each year, Ritzville experiences 86 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 Ritzville, 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)		 15°C
(58°F)		 20°C
(67°F)		 29°C
(84°F)		 34°C
(94°F)		 45°C
(114°F)		 43°C
(110°F)		 41°C
(106°F)		 37°C
(99°F)		 29°C
(84°F)		 17°C
(64°F)		 16°C
(61°F)
Mean maximum 10°C
(49°F)		 12°C
(53°F)		 17°C
(64°F)		 24°C
(75°F)		 31°C
(88°F)		 35°C
(94°F)		 39°C
(103°F)		 40°C
(103°F)		 34°C
(93°F)		 23°C
(73°F)		 16°C
(61°F)		 12°C
(54°F)
Average high 3°C
(38°F)		 4°C
(40°F)		 11°C
(51°F)		 16°C
(61°F)		 22°C
(72°F)		 27°C
(81°F)		 32°C
(90°F)		 31°C
(89°F)		 25°C
(76°F)		 15°C
(59°F)		 8°C
(47°F)		 3°C
(38°F)
Daily mean 0°C
(33°F)		 0°C
(33°F)		 6°C
(43°F)		 10°C
(51°F)		 17°C
(62°F)		 21°C
(70°F)		 26°C
(78°F)		 25°C
(77°F)		 19°C
(66°F)		 10°C
(50°F)		 4°C
(40°F)		 1°C
(33°F)
Average low -2°C
(29°F)		 -3°C
(27°F)		 2°C
(35°F)		 5°C
(42°F)		 11°C
(52°F)		 15°C
(59°F)		 18°C
(64°F)		 18°C
(64°F)		 13°C
(55°F)		 5°C
(42°F)		 1°C
(35°F)		 -2°C
(29°F)
Mean minimum -12°C
(11°F)		 -11°C
(13°F)		 -6°C
(22°F)		 -1°C
(31°F)		 4°C
(39°F)		 8°C
(47°F)		 13°C
(55°F)		 11°C
(53°F)		 6°C
(43°F)		 -3°C
(27°F)		 -5°C
(23°F)		 -9°C
(16°F)
Minimum -20°C
(-3°F)		 -14°C
(7°F)		 -13°C
(9°F)		 -3°C
(27°F)		 3°C
(37°F)		 7°C
(45°F)		 12°C
(54°F)		 10°C
(50°F)		 2°C
(36°F)		 -10°C
(15°F)		 -8°C
(18°F)		 -14°C
(8°F)

Compare climate in Ritzville with other places

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

Monthly average precipitation in Ritzville, Washington, United States §

Ritzville usually has the most precipitation in January, February and November, with an average of 10 rainy days and 48 mm (1.9 inches) of precipitation per month.The driest months in Ritzville 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 Ritzville, 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) 51 (2.0) 43 (1.7) 41 (1.6) 33 (1.3) 24 (1.0) 12 (0.5) 1 (0.1) 7 (0.3) 17 (0.7) 38 (1.5) 51 (2.0) 43 (1.7)
Average precipitation days (≥ 1 mm) 10 11 8 7 6 3 0 2 4 7 11 9

Monthly sunshine hours in Ritzville, Washington, United States §

The sunniest months in Ritzville are June, July and August, when the sun shines an average of 12 hours 27 minutes a day.Least sunny months in Ritzville: January, February and December receive an average of 4 hours 26 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Ritzville, 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 105 162 244 294 352 371 415 358 293 241 170 135
Mean daily daylight hours 8h 58m 10h 18m 11h 57m 13h 39m 15h 6m 15h 50m 15h 25m 14h 7m 12h 29m 10h 48m 9h 19m 8h 32m

Solar UV radiation in Ritzville, Washington, United States §

Ritzville 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 Ritzville UV Index data.

Average daily maximum UV levels by month for Ritzville, 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