Corvallis (OR) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Corvallis.
Climate overview of Corvallis
Corvallis, Oregon, United States of America, sees big temperature differences between seasons, with August peaking at 28°C (82°F) and December dropping to 8°C (46°F).
Annual rain/snowfall is moderate at around 996 mm (39 in), with December being the wettest month. The city also has a distinct dry season from June to September, with warm summers and cold winters. The sunniest month is July, with 11.8 hours of sunshine per day on average.
Corvallis Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Corvallis - and find the best time to visit.
Monthly Temperature in Corvallis
Visitors to Corvallis can expect significant temperature changes throughout the year. Average daytime temperatures reach a comfortable 28°C (82°F) in August. In December, the coolest month of the year, temperatures drop to a chilly 8°C (46°F).
At night, temperatures range from around 12°C (54°F) in August to 1°C (34°F) in December.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Corvallis
Generally, Corvallis experiences moderate precipitation patterns, averaging 996 mm (39 in) yearly. Corvallis can be quite wet during December, receiving approximately 188 mm (7.4 in) of precipitation over 21 rainy days.
In contrast, during the driest month (August), you will experience much drier conditions, with 7.9 mm (0.3 in) of precipitation spread across 3 rainy days. For more details, please visit our Corvallis Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Corvallis
Corvallis can be enjoyed more throughout the sunniest month of July under a blue sky, with approximately 11.8 hours of sunshine daily. In contrast, the city experiences much darker days in December, with only 2.5 hours of sunlight per day.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Best Time to Visit Corvallis
Each month is rated for comfortable sightseeing weather — mild temperatures and low rainfall. Tap a month for its full averages; your ideal time may differ for a beach or winter trip (see below).
- Best overall: May, June, July, August and September
- Warmest weather: July and August
- Most sunshine: July
- Fewest rainy days: July and August
- Wettest period: January, February, March, November and December, when rainfall peaks.
- Climate seasons: a distinct dry season from June to September, with warm summers and cold winters
Frequently asked questions about the climate in Corvallis
What is the best time to visit Corvallis?
May, June, July, August and September typically offer the most optimal weather in Corvallis. In contrast, January, March, November and December tend to have less optimal conditions. Corvallis has a distinct dry season from June to September, with warm summers and cold winters.
What temperatures can I expect in Corvallis?
Daytime highs range from 8°C (46°F) in December to 28°C (82°F) in August. Nighttime lows range from 1°C (34°F) to 12°C (54°F). Temperatures vary considerably through the year.
How much rain does Corvallis get?
Annual rainfall is around 996 mm (39 in). December is the wettest month with 188 mm (7.4 in), while August is the driest with 7.9 mm (0.3 in).
How sunny is Corvallis?
Corvallis receives around 2,485 hours of sunshine per year. July is the sunniest month with 353 hours, while December is the cloudiest with just 76 hours. Overall, Corvallis enjoys abundant sunshine.
Corvallis 3-Day Forecast
Corvallis (OR) 3-Day Forecast
Corvallis on the map
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