Corvallis, United States experiences average highs of 18°C (64°F) and lows of 7°C (45°F) throughout the year. Rainfall is moderate, averaging about 11 rainy days per month. Average highs have stayed broadly stable across the available records.
Corvallis, United States Weather & Climate 2026
Monthly climate averages for Corvallis, United States. Based on 10-year ERA5 reanalysis data.
Climate Overview
Drier season: May–Oct 
Wetter season: Jan–Dec At-a-Glance Climate Summary
Live Weather & Air Quality
Key figures
Climate Score
6.2/10
Best: June, July, August, September
UV Index
4
Low
Temperature 18°C / 7°C
Feels Like 17°C / 6°C
Rainy Days 11
Rainfall 100 mm
Sunshine 8 h
Humidity 77%
Wind Speed 13 km/h
Dew Point 8°C
Snow Days 2 days
Frost Days 6 days
Hottest Month
30°C
August
Avg Low14°C
Rain1days
Coldest Month
2°C
February
Avg High10°C
Rain16days
Driest Month
1days
July
Avg High29°C
Avg Low13°C
Windiest Month
14 km/h
March (Gusts 38)
Worst Time to Visit
Consider avoiding January, February, November, December due to heavy rainfall.
Sun Position
Sunrise 05:29
Daylight 15.5h
Sunset 21:01
Live conditions—
Corvallis on the map · live conditions
Corvallis, United States
- Continent
- Americas
- Country
- United States
- City
- Corvallis
- Population
- 55.8K
- Elevation
- 71 m
- Coordinates
- 44.56°, -123.26°
Seasonal Breakdown
Spring
Mar–May
Avg High 16°C
Avg Low 6°C
Rain 13 days/mo
Summer
Jun–Aug
Avg High 28°C
Avg Low 13°C
Rain 3 days/mo
3/3 best months
Autumn
Sep–Nov
Avg High 19°C
Avg Low 8°C
Rain 11 days/mo
1/3 best months
Winter
Dec–Feb
Avg High 9°C
Avg Low 2°C
Rain 17 days/mo
Climate Charts
Based on historical averages (2016–2025)
Monthly Temperatures
HighLowShaded bands show the typical range across the available yearly records.
Line chart showing monthly temperatures. Jan: 9°C / 2°C . Feb: 10°C / 2°C . Mar: 12°C / 3°C . Apr: 16°C / 5°C . May: 20°C / 8°C . Jun: 24°C / 11°C . Jul: 29°C / 13°C . Aug: 30°C / 14°C . Sep: 26°C / 12°C . Oct: 18°C / 8°C . Nov: 12°C / 5°C . Dec: 9°C / 3°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 186 mm. Feb: 146 mm. Mar: 153 mm. Apr: 113 mm. May: 59 mm. Jun: 38 mm. Jul: 4 mm. Aug: 6 mm. Sep: 43 mm. Oct: 105 mm. Nov: 160 mm. Dec: 192 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 89%. Feb: 87%. Mar: 85%. Apr: 78%. May: 73%. Jun: 67%. Jul: 59%. Aug: 58%. Sep: 67%. Oct: 79%. Nov: 88%. Dec: 91%.
Monthly Wind Speed
Wind SpeedGusts
Bar chart showing monthly wind speed. Jan: 13 km/h . Feb: 13 km/h . Mar: 14 km/h . Apr: 14 km/h . May: 13 km/h . Jun: 13 km/h . Jul: 13 km/h . Aug: 13 km/h . Sep: 12 km/h . Oct: 13 km/h . Nov: 13 km/h . Dec: 13 km/h .
Sunshine
Sunshine
Sunshine: Jan: 4h. Feb: 6h. Mar: 7h. Apr: 9h. May: 11h. Jun: 12h. Jul: 13h. Aug: 12h. Sep: 10h. Oct: 7h. Nov: 5h. Dec: 4h.
UV Index
UV Index
Bar chart showing monthly UV index. Jan: UV 2. Feb: UV 2. Mar: UV 4. Apr: UV 5. May: UV 7. Jun: UV 7. Jul: UV 8. Aug: UV 7. Sep: UV 5. Oct: UV 3. Nov: UV 2. Dec: UV 1.
Monthly Daylight Hours
Daylight12h reference
Monthly Dew Point & Comfort
Dew Point Dry Comfortable Humid Muggy Oppressive
Snow Days
Snow DaysSnowfall
Snow Days: Jan: 2 days. Feb: 4 days. Mar: 3 days. Apr: 1 days. May: 0 days. Jun: 0 days. Jul: 0 days. Aug: 0 days. Sep: 0 days. Oct: 0 days. Nov: 0 days. Dec: 2 days.
Climate Trends
Average highs have stayed broadly stable across the available records. Average rainfall is trending drier by about 29 mm.
2016 to 2025
Avg high Avg rainfall
Climate summary
| Last 12 months | All years | |
|---|---|---|
| Hottest month | Aug 2025 · 30°C | Aug · 30°C |
| Coldest month | Jan 2025 · 1°C | Feb · 2°C |
| Wettest month | Mar 2025 · 232 mm | Dec · 192 mm |
| Windiest month | Mar 2025 · 15 km/h | Mar · 14 km/h |
Month-by-Month Weather Table
January
Wet 
February
Poor March
Wet April
Fair May
Good June best
Excellent July best
Excellent August best
Excellent September best
Excellent October
Good November
Poor December
Wet | Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January | 9°C / 2°C | 7°C / 0°C | 18days (186 mm) Wet | 4.4h Fair | 89% Very Muggy | 1.7 Low | Wet | View Details |
| February | 10°C / 2°C | 7°C / -1°C | 16days (146 mm) Wet | 5.6h Fair | 87% Very Muggy | 2.4 Moderate | Poor | View Details |
| March | 12°C / 3°C | 10°C / 0°C | 18days (153 mm) Wet | 7.1h Good | 85% Humid | 3.8 Moderate | Wet | View Details |
| April | 16°C / 5°C | 14°C / 3°C | 14days (113 mm) Wet | 8.7h Good | 78% Humid | 5.4 High | Fair | View Details |
| May | 20°C / 8°C | 20°C / 7°C | 8days (59 mm) Wet | 10.6h Excellent | 73% Muggy | 6.6 High | Good | View Details |
| June best | 24°C / 11°C | 24°C / 10°C | 6days (38 mm) Good | 12.2h Excellent | 67% Muggy | 7.1 Very High | Excellent | View Details |
| July best | 29°C / 13°C | 29°C / 13°C | 1days (4 mm) Excellent | 13.2h Excellent | 59% Moderate | 7.6 Very High | Excellent | View Details |
| August best | 30°C / 14°C | 30°C / 14°C | 1days (6 mm) Excellent | 12.1h Excellent | 58% Moderate | 6.7 High | Excellent | View Details |
| September best | 26°C / 12°C | 25°C / 12°C | 5days (43 mm) Good | 9.9h Good | 67% Muggy | 5.2 High | Excellent | View Details |
| October | 18°C / 8°C | 17°C / 7°C | 11days (105 mm) Wet | 7.4h Good | 79% Humid | 3.4 Moderate | Good | View Details |
| November | 12°C / 5°C | 11°C / 3°C | 16days (160 mm) Wet | 5.2h Fair | 88% Very Muggy | 2 Low | Poor | View Details |
| December | 9°C / 3°C | 7°C / 0°C | 18days (192 mm) Wet | 4.1h Fair | 91% Very Muggy | 1.4 Low | Wet | View Details |
Compare Nearby City Climates
Frequently Asked Questions
The best months to visit Corvallis are June, July, August, September, when temperatures are comfortable and rainfall is at its lowest. This is based on 10-year climate averages for Corvallis, scoring temperature, rainfall, humidity, and sunshine hours.
The hottest month in Corvallis is August, with average daytime highs of 30°C (86°F). Plan outdoor activities for early morning or late afternoon if visiting during this period.
The coldest month in Corvallis is February, with average overnight lows of 2°C (36°F). Pack warm layers and expect shorter daylight hours during this period.
The wettest month in Corvallis is December, averaging 192mm of precipitation across 18 rainy days. An umbrella or waterproof jacket is essential.
The rainy season in Corvallis runs through January, March, December, February, with the heaviest rainfall in January. Based on 10-year averages for Corvallis.
Corvallis receives approximately 101 sunshine hours per year. The sunniest month is July with around 13 hours. Based on climate data for Corvallis.
The least favorable months to visit Corvallis are January, February, November, December, primarily due to heavy rainfall. For the best conditions, consider June, July, August, September instead.
The annual average UV index in Corvallis is 4, classified as moderate. Standard sun protection (sunscreen, hat) is recommended during prolonged outdoor exposure.
Average humidity in Corvallis is 77%, classified as humid. Humidity levels are generally comfortable and should not affect outdoor activities for most people.
Yes, Corvallis receives snow. Months with snowfall average 2 snow days and 3 cm (1 in) of accumulation, with about 6 frost days during winter.
Average wind speeds in Corvallis are 13 km/h (8 mph). The windiest month is March with peak winds reaching 14 km/h (9 mph) (gusts up to 38 km/h / 23 mph).
Corvallis averages 6 clear-sky days per month with overall cloud cover around 59%. The clearest skies occur in July.
The annual average dew point in Corvallis is 8°C (46°F), which feels dry and comfortable. Outdoor activities are comfortable year-round from a humidity standpoint.
Corvallis has a Hot-Summer Mediterranean climate, classified as Csa under the Köppen system. Temperate climates have mild winters and warm summers, with rainfall spread across the year and four distinct seasons.
The 'feels like' temperature in Corvallis ranges from 6°C (43°F) to 17°C (63°F) on average. The 'feels like' temperature closely matches the actual temperature throughout most of the year.
Yes, June is a great time to visit Corvallis. It earns a climate score of 8.8/10 with Excellent.
For June in Corvallis, pack Warm evening layer, Umbrella, Breathable clothing, Sunscreen (SPF 30+), Sun hat. With average highs of 24°C (75°F) and 6 rainy days, these essentials will keep you comfortable.
Data Source
Climate data derived from ERA5 reanalysis (ECMWF), averaged over 2016–2025. Sea surface temperature from marine reanalysis data. Climate scores and seasonal estimates are computed by WorldStats.
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