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Monthly climate in Oroville, Washington, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Oroville features a humid continental climate (Dfb).Temperatures typically range between -3 °C (27 °F) and 21 °C (70 °F) through the year, but rarely can drop to -25 °C (-13 °F) or can rise to as high as 40 °C (105 °F).The average annual precipitation amounts to about 697 mm (27.4 inches) and receives 120 rainy days on the 1 mm (0.04 inches) threshold annually.Oroville enjoys an average of 2940 hours of sunshine throughout the year, and daylight varies from 8 hours 16 minutes to 16 hours 7 minutes per day.

Monthly average temperatures in Oroville, Washington, United States §

The warmest months in Oroville 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 -3 to -2 °C (27 - 29 °F) throughout the day. On average each year, Oroville experiences 52 days above 25 °C (77.0 °F) and 124 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Oroville, 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 6°C
(44°F)		 11°C
(52°F)		 18°C
(64°F)		 23°C
(74°F)		 28°C
(83°F)		 40°C
(105°F)		 40°C
(104°F)		 36°C
(97°F)		 31°C
(88°F)		 23°C
(74°F)		 13°C
(56°F)		 14°C
(57°F)
Mean maximum 5°C
(41°F)		 8°C
(47°F)		 14°C
(57°F)		 19°C
(67°F)		 26°C
(80°F)		 29°C
(85°F)		 35°C
(94°F)		 34°C
(94°F)		 28°C
(84°F)		 18°C
(65°F)		 11°C
(53°F)		 8°C
(46°F)
Average high 0°C
(33°F)		 1°C
(34°F)		 7°C
(45°F)		 12°C
(54°F)		 18°C
(65°F)		 23°C
(73°F)		 28°C
(82°F)		 27°C
(81°F)		 20°C
(68°F)		 11°C
(53°F)		 5°C
(41°F)		 0°C
(33°F)
Daily mean -3°C
(27°F)		 -3°C
(27°F)		 3°C
(37°F)		 7°C
(45°F)		 13°C
(55°F)		 17°C
(63°F)		 21°C
(70°F)		 20°C
(69°F)		 15°C
(59°F)		 7°C
(44°F)		 2°C
(35°F)		 -2°C
(29°F)
Average low -6°C
(22°F)		 -7°C
(19°F)		 -2°C
(29°F)		 2°C
(35°F)		 6°C
(43°F)		 10°C
(49°F)		 13°C
(55°F)		 13°C
(55°F)		 9°C
(49°F)		 2°C
(36°F)		 -1°C
(30°F)		 -4°C
(24°F)
Mean minimum -18°C
(-0°F)		 -19°C
(-2°F)		 -10°C
(14°F)		 -4°C
(25°F)		 0°C
(33°F)		 5°C
(41°F)		 8°C
(47°F)		 8°C
(47°F)		 3°C
(37°F)		 -5°C
(24°F)		 -7°C
(19°F)		 -13°C
(8°F)
Minimum -24°C
(-11°F)		 -25°C
(-13°F)		 -21°C
(-6°F)		 -5°C
(23°F)		 -1°C
(30°F)		 3°C
(37°F)		 8°C
(46°F)		 7°C
(44°F)		 1°C
(34°F)		 -9°C
(16°F)		 -12°C
(11°F)		 -24°C
(-10°F)

Compare climate in Oroville with other places

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

Monthly average precipitation in Oroville, Washington, United States §

Oroville usually has the most precipitation in January, November and December, with an average of 16 rainy days and 92 mm (3.6 inches) of precipitation per month.The driest months in Oroville are June, July and August. On average, 17 mm (0.7 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Oroville, 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) 87 (3.4) 73 (2.9) 81 (3.2) 65 (2.5) 42 (1.6) 31 (1.2) 8 (0.3) 12 (0.5) 40 (1.6) 68 (2.7) 92 (3.6) 98 (3.9)
Average precipitation days (≥ 1 mm) 15 14 13 11 6 6 2 2 7 11 17 16

Monthly sunshine hours in Oroville, Washington, United States §

The sunniest months in Oroville are June, July and August, when the sun shines an average of 12 hours 9 minutes a day.Least sunny months in Oroville: January, November and December receive an average of 3 hours 43 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Oroville, 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 96 160 231 272 337 356 402 359 269 207 129 115
Mean daily daylight hours 8h 44m 10h 10m 11h 56m 13h 45m 15h 19m 16h 7m 15h 40m 14h 16m 12h 31m 10h 43m 9h 7m 8h 16m

Solar UV radiation in Oroville, Washington, United States §

Oroville 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 Oroville UV Index data.

Average daily maximum UV levels by month for Oroville, 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 7 8 9 9 8 7 4 3 1