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Monthly climate in Willamina, Oregon, United States

Last updated: March 2, 2024

Under the Köppen–Geiger climate classification Willamina features a warm-summer Mediterranean climate (Csb). Temperatures typically range between 5 °C (41 °F) and 19 °C (66 °F) through the year, but rarely can drop to -10 °C (14 °F) or can rise to as high as 42 °C (107 °F). The average annual precipitation amounts to about 1334 mm (52.5 inches) and receives 135 rainy days on the 1 mm (0.04 inches) threshold annually. Willamina enjoys an average of 2624 hours of sunshine throughout the year, and daylight varies from 8 hours 48 minutes to 15 hours 33 minutes per day.

Monthly average temperatures in Willamina, Oregon, United States §

The warmest months in Willamina are July, August and September, with daily mean temperatures ranging from 16 to 19 °C (61 - 66 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 5 to 5 °C (41 - 41 °F) throughout the day. On average each year, Willamina experiences 42 days above 25 °C (77.0 °F) and 38 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Willamina, Oregon, 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
(58°F)		 16°C
(61°F)		 22°C
(72°F)		 27°C
(81°F)		 31°C
(87°F)		 42°C
(107°F)		 35°C
(96°F)		 40°C
(103°F)		 35°C
(95°F)		 25°C
(77°F)		 17°C
(64°F)		 15°C
(59°F)
Mean maximum 13°C
(55°F)		 13°C
(57°F)		 18°C
(65°F)		 23°C
(74°F)		 27°C
(81°F)		 32°C
(89°F)		 32°C
(90°F)		 36°C
(97°F)		 31°C
(88°F)		 22°C
(71°F)		 16°C
(62°F)		 13°C
(56°F)
Average high 8°C
(47°F)		 8°C
(47°F)		 11°C
(52°F)		 14°C
(58°F)		 18°C
(65°F)		 21°C
(71°F)		 25°C
(77°F)		 26°C
(79°F)		 22°C
(73°F)		 16°C
(61°F)		 11°C
(52°F)		 8°C
(46°F)
Daily mean 5°C
(41°F)		 5°C
(41°F)		 7°C
(45°F)		 9°C
(49°F)		 13°C
(55°F)		 16°C
(61°F)		 18°C
(65°F)		 19°C
(66°F)		 16°C
(61°F)		 11°C
(52°F)		 7°C
(46°F)		 5°C
(41°F)
Average low 3°C
(37°F)		 2°C
(35°F)		 3°C
(38°F)		 5°C
(41°F)		 8°C
(46°F)		 10°C
(51°F)		 12°C
(53°F)		 12°C
(55°F)		 11°C
(52°F)		 6°C
(44°F)		 4°C
(40°F)		 2°C
(36°F)
Mean minimum -4°C
(25°F)		 -4°C
(24°F)		 -2°C
(28°F)		 -1°C
(30°F)		 2°C
(36°F)		 5°C
(41°F)		 8°C
(47°F)		 8°C
(47°F)		 5°C
(42°F)		 -1°C
(31°F)		 -3°C
(27°F)		 -4°C
(24°F)
Minimum -10°C
(14°F)		 -6°C
(22°F)		 -4°C
(26°F)		 -2°C
(28°F)		 1°C
(35°F)		 4°C
(39°F)		 6°C
(43°F)		 7°C
(46°F)		 4°C
(40°F)		 -3°C
(26°F)		 -5°C
(23°F)		 -6°C
(21°F)

Compare climate in Willamina with other places

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

Monthly average precipitation in Willamina, Oregon, United States §

Willamina usually has the most precipitation in January, February and December, with an average of 17 rainy days and 195 mm (7.7 inches) of precipitation per month. The driest months in Willamina are June, July and August. On average, 20 mm (0.8 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Willamina, Oregon, 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) 194 (7.6) 180 (7.1) 150 (5.9) 126 (4.9) 63 (2.5) 49 (1.9) 5 (0.2) 6 (0.2) 68 (2.7) 105 (4.1) 178 (7.0) 210 (8.3)
Average precipitation days (≥ 1 mm) 17 17 17 14 9 6 1 1 7 11 16 19

Monthly sunshine hours in Willamina, Oregon, United States §

The sunniest months in Willamina are June, July and August, when the sun shines an average of 10 hours 59 minutes a day. Least sunny months in Willamina: January, February and December receive an average of 3 hours 27 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Willamina, Oregon, 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 85 123 192 225 283 316 364 330 263 205 128 104
Mean daily daylight hours 9h 12m 10h 25m 11h 57m 13h 32m 14h 52m 15h 33m 15h 10m 13h 58m 12h 27m 10h 53m 9h 30m 8h 48m

Solar UV radiation in Willamina, Oregon, United States §

Willamina 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, 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 Willamina UV Index data.

Average daily maximum UV levels by month for Willamina, Oregon, 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 9 10 10 9 7 5 3 2

Detailed Monthly Weather Insights for Willamina, Oregon, United States

Discover in-depth weather details for every month in Willamina. Click through the links below for comprehensive overviews of temperature trends, precipitation levels, sunshine hours, and solar UV radiation specifics. Whether planning a visit or simply curious about Willamina's climate nuances, these monthly breakdowns provide the information you need for an informed understanding of what to expect throughout the year.

Each link leads to a detailed account of the typical weather conditions for that month, providing both locals and tourists with vital information to plan their daily activities, wardrobe, and travel itineraries accordingly.