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Monthly climate in Oregon City, Oregon, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Oregon City features a warm-summer Mediterranean climate (Csb).Temperatures typically range between 4 °C (40 °F) and 21 °C (69 °F) through the year, but rarely can drop to -13 °C (9 °F) or can rise to as high as 47 °C (117 °F).The average annual precipitation amounts to about 1424 mm (56.1 inches) and receives 156 rainy days on the 1 mm (0.04 inches) threshold annually.Oregon City enjoys an average of 2794 hours of sunshine throughout the year, and daylight varies from 8 hours 46 minutes to 15 hours 34 minutes per day.

Monthly average temperatures in Oregon City, Oregon, United States §

The warmest months in Oregon City are July, August and September, with daily mean temperatures ranging from 17 to 21 °C (63 - 69 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 4 to 5 °C (40 - 41 °F) throughout the day. On average each year, Oregon City experiences 59 days above 25 °C (77.0 °F) and 41 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Oregon City, 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
(59°F)		 17°C
(63°F)		 22°C
(72°F)		 28°C
(82°F)		 31°C
(89°F)		 47°C
(117°F)		 37°C
(99°F)		 40°C
(104°F)		 34°C
(94°F)		 26°C
(79°F)		 19°C
(67°F)		 16°C
(62°F)
Mean maximum 13°C
(56°F)		 14°C
(57°F)		 19°C
(66°F)		 24°C
(76°F)		 28°C
(82°F)		 34°C
(93°F)		 34°C
(94°F)		 37°C
(99°F)		 32°C
(90°F)		 23°C
(74°F)		 17°C
(63°F)		 13°C
(56°F)
Average high 8°C
(47°F)		 8°C
(46°F)		 11°C
(53°F)		 15°C
(59°F)		 19°C
(66°F)		 23°C
(73°F)		 27°C
(81°F)		 28°C
(83°F)		 23°C
(74°F)		 16°C
(61°F)		 11°C
(52°F)		 8°C
(46°F)
Daily mean 5°C
(41°F)		 4°C
(40°F)		 7°C
(44°F)		 10°C
(50°F)		 13°C
(56°F)		 17°C
(63°F)		 20°C
(68°F)		 21°C
(69°F)		 17°C
(63°F)		 11°C
(52°F)		 7°C
(45°F)		 5°C
(40°F)
Average low 2°C
(36°F)		 1°C
(34°F)		 3°C
(37°F)		 5°C
(41°F)		 8°C
(47°F)		 11°C
(52°F)		 13°C
(55°F)		 13°C
(56°F)		 11°C
(52°F)		 6°C
(43°F)		 4°C
(39°F)		 2°C
(36°F)
Mean minimum -6°C
(22°F)		 -7°C
(20°F)		 -3°C
(27°F)		 -1°C
(30°F)		 2°C
(36°F)		 6°C
(43°F)		 9°C
(48°F)		 8°C
(47°F)		 5°C
(41°F)		 -1°C
(30°F)		 -3°C
(27°F)		 -5°C
(24°F)
Minimum -13°C
(9°F)		 -12°C
(11°F)		 -5°C
(23°F)		 -3°C
(27°F)		 1°C
(34°F)		 4°C
(40°F)		 8°C
(46°F)		 7°C
(45°F)		 3°C
(39°F)		 -4°C
(26°F)		 -6°C
(22°F)		 -7°C
(19°F)

Compare climate in Oregon City with other places

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

Monthly average precipitation in Oregon City, Oregon, United States §

Oregon City usually has the most precipitation in January, February and December, with an average of 19 rainy days and 202 mm (8.0 inches) of precipitation per month.The driest months in Oregon City are June, July and August. On average, 24 mm (1.0 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Oregon City, 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) 176 (6.9) 219 (8.6) 154 (6.0) 140 (5.5) 70 (2.7) 57 (2.2) 7 (0.3) 10 (0.4) 78 (3.1) 130 (5.1) 173 (6.8) 212 (8.3)
Average precipitation days (≥ 1 mm) 17 20 18 16 12 9 2 3 8 13 17 21

Monthly sunshine hours in Oregon City, Oregon, United States §

The sunniest months in Oregon City are June, July and August, when the sun shines an average of 11 hours 42 minutes a day.Least sunny months in Oregon City: January, February 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 Oregon City, 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 95 123 201 243 293 334 392 350 269 221 149 120
Mean daily daylight hours 9h 10m 10h 24m 11h 57m 13h 33m 14h 54m 15h 34m 15h 12m 13h 59m 12h 27m 10h 53m 9h 29m 8h 46m

Solar UV radiation in Oregon City, Oregon, United States §

Oregon City 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 Oregon City UV Index data.

Average daily maximum UV levels by month for Oregon City, 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