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May Weather in Corvallis, United States

Last updated: June 24, 2025

In May, the average temperature in Corvallis, United States hovers around 13°C (57°F), with extremes ranging from a brisk 1°C (34°F) to a warm 30°C (86°F). Expect about 60 mm (2.3 in) of precipitation over 9 days, and prepare for an average humidity level of 83%.

May Temperature in Corvallis

In May in Corvallis, the average temperature is 13°C (57°F), with maximums reaching up to 30°C (86°F) and minimums dropping as low as 1°C (34°F). It's advisable to pack layers and be prepared for varying conditions during your travels.

May Weather in Corvallis: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in Corvallis, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Corvallis, May typically has an average temperature of 13°C (57°F), with highs reaching up to 30°C (86°F) and lows dropping to around 1°C (34°F).
JanFebMarAprMayJunJulAugSepOctNovDec414145505663686963534641
Data source: Temperature data for Corvallis 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.

May Precipitation in Corvallis

In Corvallis in May, the total precipitation amount is 60 mm (2.3 in), occurring over the course of 9 days.

May Precipitation Trends in Corvallis

The chart displays monthly precipitation patterns in Corvallis, with values for each month alongside May’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how May’s conditions compare to those of other months. In Corvallis, May typically receives around 60 mm (2.3 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec1551791331176042356184139189
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Corvallis

In Corvallis in May humidity is 83%. With an average temperature of 13°C (57°F), this humidity feels like a damp chill that clings to your skin, making outdoor activities slightly uncomfortable and requiring a light jacket.

May Average Humidity in Corvallis

This chart illustrates the average monthly humidity levels in Corvallis, with May’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In May, average humidity in Corvallis is approximately 83%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%84%85%83%83%84%82%74%71%81%87%87%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Corvallis

In Corvallis in May, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Corvallis.

Maximum UV Index Levels in Corvallis for May

The chart shows the monthly maximum UV Index (UVI) for Corvallis in May, 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 May, the maximum UV index in Corvallis typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec246710101098532
Data source: Corvallis May 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 May Weather in Corvallis Compares to Other Months

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

This table compares monthly weather conditions in Corvallis, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather5°C (42°F)155 mm (6.1 inches)85%low
February Weather5°C (41°F)179 mm (7.0 inches)84%moderate
March Weather7°C (45°F)133 mm (5.2 inches)85%high
April Weather10°C (50°F)117 mm (4.6 inches)83%high
May Weather13°C (57°F)60 mm (2.3 inches)83%very high
June Weather17°C (63°F)42 mm (1.7 inches)83%very high
July Weather20°C (69°F)3 mm (0.1 inches)82%very high
August Weather21°C (69°F)5 mm (0.2 inches)74%very high
September Weather17°C (64°F)61 mm (2.4 inches)71%very high
October Weather12°C (53°F)84 mm (3.3 inches)81%moderate
November Weather8°C (46°F)139 mm (5.5 inches)87%moderate
December Weather5°C (41°F)189 mm (7.4 inches)87%low

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