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August Weather in Oregon, United States

Last updated: June 24, 2025

In August, the average temperature in Oregon, United States hovers around 24°C (76°F), making it a pleasant time to visit. However, temperatures can fluctuate, with minimums dropping to 11°C (52°F) and maximums reaching as high as 37°C (99°F). Expect some rain, as precipitation amounts to 110 mm (4.3 in) over 9 days, while the air remains comfortably humid at an average of 78%.

August Temperature in Oregon

In August in Oregon, the average temperature is 24°C (76°F). Maximums can reach 37°C (99°F), while minimums can drop as low as 11°C (52°F). This makes it an ideal time for travelers seeking pleasant weather and a mix of warm days and cooler evenings.

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 24°C (76°F), with highs reaching up to 37°C (99°F) and lows dropping to around 11°C (52°F).
JanFebMarAprMayJunJulAugSepOctNovDec283045536577797671554235
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 110 mm (4.3 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 110 mm (4.3 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec41319282168133120110831234032
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 78%. With an average temperature of 24°C (76°F), this humidity feels like a warm, enveloping blanket that can make outdoor activities feel sticky and uncomfortable, potentially leading to fatigue for travelers.

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 78%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec76%78%70%73%82%82%81%78%71%71%81%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.
JanFebMarAprMayJunJulAugSepOctNovDec356910111199643
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-2°C (29°F)41 mm (1.6 inches)76%moderate
February Weather-1°C (30°F)31 mm (1.2 inches)77%moderate
March Weather7°C (45°F)92 mm (3.6 inches)70%high
April Weather12°C (53°F)82 mm (3.2 inches)73%very high
May Weather18°C (65°F)168 mm (6.6 inches)82%very high
June Weather25°C (77°F)132 mm (5.2 inches)82%extreme
July Weather26°C (79°F)119 mm (4.7 inches)81%extreme
August Weather24°C (76°F)110 mm (4.3 inches)78%very high
September Weather22°C (71°F)83 mm (3.2 inches)71%very high
October Weather13°C (56°F)123 mm (4.8 inches)71%high
November Weather6°C (43°F)40 mm (1.6 inches)81%moderate
December Weather2°C (36°F)32 mm (1.3 inches)84%moderate

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