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Monthly climate in Pomeroy, Washington, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Pomeroy features a warm-summer Mediterranean climate (Csb).Temperatures typically range between 1 °C (34 °F) and 24 °C (75 °F) through the year, but rarely can drop to -22 °C (-7 °F) or can rise to as high as 43 °C (110 °F).The average annual precipitation amounts to about 574 mm (22.6 inches) and receives 101 rainy days on the 1 mm (0.04 inches) threshold annually.Pomeroy enjoys an average of 3075 hours of sunshine throughout the year, and daylight varies from 8 hours 37 minutes to 15 hours 44 minutes per day.

Monthly average temperatures in Pomeroy, Washington, United States §

The warmest months in Pomeroy are June, July and August, with daily mean temperatures ranging from 19 to 24 °C (66 - 75 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 1 to 1 °C (34 - 34 °F) throughout the day. On average each year, Pomeroy experiences 75 days above 25 °C (77.0 °F) and 87 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Pomeroy, 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 13°C
(56°F)		 17°C
(63°F)		 19°C
(66°F)		 28°C
(82°F)		 31°C
(88°F)		 43°C
(110°F)		 41°C
(105°F)		 40°C
(104°F)		 35°C
(96°F)		 28°C
(83°F)		 20°C
(68°F)		 19°C
(66°F)
Mean maximum 10°C
(50°F)		 13°C
(56°F)		 17°C
(63°F)		 24°C
(75°F)		 28°C
(83°F)		 32°C
(90°F)		 37°C
(99°F)		 38°C
(101°F)		 33°C
(92°F)		 24°C
(75°F)		 17°C
(63°F)		 13°C
(56°F)
Average high 4°C
(39°F)		 5°C
(41°F)		 10°C
(51°F)		 15°C
(59°F)		 20°C
(68°F)		 25°C
(77°F)		 31°C
(88°F)		 30°C
(87°F)		 24°C
(76°F)		 16°C
(60°F)		 9°C
(49°F)		 4°C
(39°F)
Daily mean 1°C
(34°F)		 1°C
(34°F)		 5°C
(42°F)		 9°C
(49°F)		 14°C
(58°F)		 19°C
(66°F)		 24°C
(75°F)		 23°C
(74°F)		 18°C
(64°F)		 10°C
(50°F)		 5°C
(41°F)		 1°C
(34°F)
Average low -2°C
(28°F)		 -2°C
(28°F)		 1°C
(34°F)		 4°C
(39°F)		 8°C
(47°F)		 12°C
(55°F)		 16°C
(61°F)		 16°C
(61°F)		 11°C
(52°F)		 5°C
(41°F)		 1°C
(35°F)		 -2°C
(29°F)
Mean minimum -11°C
(12°F)		 -11°C
(12°F)		 -7°C
(20°F)		 -3°C
(27°F)		 2°C
(36°F)		 6°C
(44°F)		 10°C
(51°F)		 9°C
(49°F)		 5°C
(41°F)		 -4°C
(25°F)		 -6°C
(22°F)		 -10°C
(15°F)
Minimum -22°C
(-7°F)		 -14°C
(8°F)		 -13°C
(8°F)		 -8°C
(17°F)		 -0°C
(32°F)		 5°C
(41°F)		 9°C
(49°F)		 8°C
(46°F)		 3°C
(38°F)		 -10°C
(14°F)		 -8°C
(17°F)		 -16°C
(3°F)

Compare climate in Pomeroy with other places

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

Monthly average precipitation in Pomeroy, Washington, United States §

Pomeroy usually has the most precipitation in February, March and December, with an average of 13 rainy days and 77 mm (3.0 inches) of precipitation per month.The driest months in Pomeroy are July, August and September. On average, 12 mm (0.5 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Pomeroy, 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) 61 (2.4) 92 (3.6) 65 (2.6) 50 (2.0) 49 (1.9) 28 (1.1) 3 (0.1) 12 (0.5) 22 (0.8) 52 (2.1) 65 (2.5) 75 (2.9)
Average precipitation days (≥ 1 mm) 12 16 11 10 8 4 0 2 4 9 11 14

Monthly sunshine hours in Pomeroy, Washington, United States §

The sunniest months in Pomeroy are June, July and August, when the sun shines an average of 12 hours 14 minutes a day.Least sunny months in Pomeroy: January, February and December receive an average of 4 hours 14 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Pomeroy, 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 111 142 235 283 341 362 410 354 289 238 175 131
Mean daily daylight hours 9h 2m 10h 20m 11h 57m 13h 36m 15h 1m 15h 44m 15h 20m 14h 4m 12h 28m 10h 49m 9h 22m 8h 37m

Solar UV radiation in Pomeroy, Washington, United States §

Pomeroy 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 Pomeroy UV Index data.

Average daily maximum UV levels by month for Pomeroy, 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 7 5 3 2