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August Weather in Oregon, United States

Last updated: June 24, 2025

In Oregon, United States, the average temperature in August hovers around 23°C (73°F). Expect a temperature range where it can dip to a minimum of 11°C (51°F) and soar to a maximum of 34°C (94°F). During this month, anticipate about 77 mm (3.0 in) of precipitation over approximately 9 days, coupled with an average humidity level of 81%.

August Temperature in Oregon

In August, in Oregon, the average temperature is 23°C (73°F), with maximums reaching up to 34°C (94°F) and minimums dipping as low as 11°C (51°F). This pleasant climate makes Oregon a wonderful destination for travelers seeking a comfortable getaway.

August Weather in Oregon: Daily Temperature Highs, Lows, and Averages

The chart illustrates August temperature patterns in Oregon, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Oregon, August typically has an average temperature of 23°C (73°F), with highs reaching up to 34°C (94°F) and lows dropping to around 11°C (51°F).
JanFebMarAprMayJunJulAugSepOctNovDec232539486172757367533832
Data source: Temperature data for Oregon generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

August Precipitation in Oregon

In Oregon in August, the precipitation amount is 77 mm (3.0 in) over the course of 9 days.

August Precipitation Trends in Oregon

The chart displays monthly precipitation patterns in Oregon, with values for each month alongside August’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how August’s conditions compare to those of other months. In Oregon, August typically receives around 77 mm (3.0 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec60567910915712178771201164951
Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.
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August Humidity in Oregon

In Oregon in August, humidity is 81%. With an average temperature of 23°C (73°F), this humidity feels like a heavy blanket wrapping around you, making every step feel more laborious while traveling and causing you to constantly seek out shade or a cool breeze for relief.

August Average Humidity in Oregon

This chart illustrates the average monthly humidity levels in Oregon, with August’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In August, average humidity in Oregon is approximately 81%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec82%83%84%85%79%82%80%81%80%82%88%84%
Data source: Humidity data for August generated using information from the Copernicus Climate Change Service.

August UV Index in Oregon

In Oregon in August, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Oregon.

Maximum UV Index Levels in Oregon for August

The chart shows the monthly maximum UV Index (UVI) for Oregon in August, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In August, the maximum UV index in Oregon typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec34689101098632
Data source: Oregon August UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

How August Weather in Oregon Compares to Other Months

Weather in Oregon varies notably across the year, with each month offering distinct climate conditions. This page compares August’s weather to other months in Oregon, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Oregon, showing how August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-5°C (23°F)60 mm (2.4 inches)82%moderate
February Weather-4°C (26°F)56 mm (2.2 inches)83%moderate
March Weather4°C (39°F)79 mm (3.1 inches)84%high
April Weather9°C (48°F)109 mm (4.3 inches)85%very high
May Weather16°C (61°F)156 mm (6.2 inches)79%very high
June Weather22°C (72°F)121 mm (4.8 inches)82%very high
July Weather24°C (76°F)78 mm (3.1 inches)80%very high
August Weather23°C (73°F)77 mm (3.0 inches)81%very high
September Weather20°C (67°F)120 mm (4.7 inches)80%very high
October Weather12°C (54°F)116 mm (4.6 inches)82%high
November Weather3°C (38°F)49 mm (1.9 inches)88%moderate
December Weather0°C (32°F)51 mm (2.0 inches)84%low

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