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Monthly climate in Fossil, Oregon, United States

Last updated: March 2, 2024

Under the Köppen–Geiger climate classification Fossil features a warm-summer Mediterranean climate (Csb). Temperatures typically range between 1 °C (34 °F) and 23 °C (74 °F) through the year, but rarely can drop to -26 °C (-14 °F) or can rise to as high as 44 °C (112 °F). The average annual precipitation amounts to about 441 mm (17.4 inches) and receives 95 rainy days on the 1 mm (0.04 inches) threshold annually. Fossil enjoys an average of 3182 hours of sunshine throughout the year, and daylight varies from 8 hours 48 minutes to 15 hours 32 minutes per day.

Monthly average temperatures in Fossil, Oregon, United States §

The warmest months in Fossil are June, July and August, with daily mean temperatures ranging from 19 to 23 °C (66 - 74 °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 - 35 °F) throughout the day. On average each year, Fossil experiences 78 days above 25 °C (77.0 °F) and 88 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Fossil, 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 15°C
(60°F)		 17°C
(63°F)		 19°C
(67°F)		 29°C
(84°F)		 32°C
(90°F)		 44°C
(112°F)		 39°C
(102°F)		 39°C
(102°F)		 37°C
(99°F)		 29°C
(85°F)		 22°C
(71°F)		 18°C
(65°F)
Mean maximum 11°C
(52°F)		 14°C
(58°F)		 18°C
(65°F)		 24°C
(76°F)		 30°C
(86°F)		 34°C
(94°F)		 37°C
(99°F)		 37°C
(99°F)		 34°C
(93°F)		 24°C
(75°F)		 18°C
(65°F)		 14°C
(57°F)
Average high 4°C
(40°F)		 6°C
(43°F)		 10°C
(50°F)		 15°C
(58°F)		 20°C
(68°F)		 25°C
(77°F)		 31°C
(87°F)		 30°C
(86°F)		 24°C
(76°F)		 16°C
(61°F)		 10°C
(50°F)		 5°C
(41°F)
Daily mean 1°C
(34°F)		 1°C
(35°F)		 5°C
(41°F)		 9°C
(48°F)		 14°C
(57°F)		 19°C
(66°F)		 23°C
(74°F)		 23°C
(74°F)		 17°C
(63°F)		 10°C
(50°F)		 5°C
(41°F)		 1°C
(34°F)
Average low -2°C
(28°F)		 -2°C
(28°F)		 0°C
(33°F)		 3°C
(38°F)		 8°C
(46°F)		 12°C
(53°F)		 15°C
(60°F)		 15°C
(60°F)		 10°C
(51°F)		 4°C
(39°F)		 1°C
(34°F)		 -2°C
(29°F)
Mean minimum -13°C
(8°F)		 -12°C
(11°F)		 -7°C
(19°F)		 -3°C
(27°F)		 1°C
(33°F)		 5°C
(42°F)		 9°C
(49°F)		 8°C
(47°F)		 4°C
(39°F)		 -4°C
(24°F)		 -6°C
(21°F)		 -10°C
(14°F)
Minimum -26°C
(-14°F)		 -16°C
(4°F)		 -15°C
(6°F)		 -4°C
(25°F)		 -1°C
(31°F)		 4°C
(40°F)		 7°C
(45°F)		 6°C
(43°F)		 2°C
(35°F)		 -10°C
(14°F)		 -9°C
(16°F)		 -13°C
(9°F)

Compare climate in Fossil with other places

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

Monthly average precipitation in Fossil, Oregon, United States §

Fossil usually has the most precipitation in February, November and December, with an average of 12 rainy days and 58 mm (2.3 inches) of precipitation per month. The driest months in Fossil are June, July and August. On average, 8 mm (0.3 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Fossil, 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) 51 (2.0) 68 (2.7) 51 (2.0) 51 (2.0) 33 (1.3) 17 (0.7) 1 (0.0) 7 (0.3) 21 (0.8) 35 (1.4) 52 (2.0) 54 (2.1)
Average precipitation days (≥ 1 mm) 12 14 12 11 6 5 0 1 4 7 10 13

Monthly sunshine hours in Fossil, Oregon, United States §

The sunniest months in Fossil are June, July and August, when the sun shines an average of 12 hours 34 minutes a day. Least sunny months in Fossil: January, February and December receive an average of 4 hours 40 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Fossil, 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 112 164 244 282 354 378 413 364 297 249 172 147
Mean daily daylight hours 9h 12m 10h 25m 11h 57m 13h 32m 14h 52m 15h 32m 15h 10m 13h 58m 12h 27m 10h 53m 9h 31m 8h 48m

Solar UV radiation in Fossil, Oregon, United States §

Fossil 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 Fossil UV Index data.

Average daily maximum UV levels by month for Fossil, 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 4 6 7 9 10 10 9 8 5 3 2

Detailed Monthly Weather Insights for Fossil, Oregon, United States

Discover in-depth weather details for every month in Fossil. 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 Fossil'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.