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Weather & Climate in Corvallis, OR
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Corvallis experiences four distinct seasons with an average annual temperature of 53°F (12°C). Winters average 41°F in January while summers reach 68°F in July. The area gets 251 sunny days per year, above the national average. Annual precipitation totals 43.0 inches. The area receives 2.9 inches of snow annually. Air quality is rated Good with a median AQI of 32. The city sits at an elevation of 256 feet.
Temperature
41°F Jan (5°C)
68°F Jul (20°C)
| Annual Average | 52.9°F |
| 2% below US avg | |
| January Average | 41°F (5°C) |
| July Average | 68°F (20°C) |
| Sunny Days | 251 days/yr |
Geography
| Elevation | 256 ft (78 m) |
| Area | 14.3 sq mi (37.0 km²) |
| Population Density | 4,159/sq mi |
| Coordinates | 44.5699°N, 123.2783°W |
| Timezone | America/Los_Angeles |
| County | Benton County County |
| Nearest Airport | Mahlon Sweet Field (EUG) 31 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 32.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively Moderate |
| Risk Score | 84.4 / 100 |
| Social Vulnerability | 18.5 / 100 |
| Community Resilience | 97.0 / 100 |
Hazard Breakdown
| Tornado | Very Low |
| Earthquake | Relatively Moderate |
| Wildfire | Very Low |
| Flood | Relatively Moderate |
| Hail | Very Low |
| Strong Wind | Very Low |
| Heat Wave | Relatively Moderate |
| Winter Weather | Relatively Low |
| Lightning | Relatively Low |
| Ice Storm | Relatively Low |
| Drought | Very Low |
| Cold Wave | Very Low |
| Landslide | Relatively Moderate |
| Coastal Flood | No Rating |
| Volcano | Very Low |
| Avalanche | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
136 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M5.6.
| Mar 25, 1993 | 4 km E of Scotts Mills, Oregon | M5.6 | 74 km | 20 km |
| Jul 12, 2004 | 30 km W of Yachats, Oregon | M4.9 | 100 km | 29 km |
| Aug 19, 2004 | 19 km W of Newport, Oregon | M4.7 | 82 km | 27 km |
| Jul 4, 2015 | 16 km ENE of Springfield, Oregon | M4.1 | 64 km | 8 km |
| Apr 24, 2003 | 3 km NW of North Portland, Oregon | M3.9 | 126 km | 17 km |
| Apr 15, 2017 | 43 km WNW of Yachats, Oregon | M3.9 | 107 km | 38 km |
| Feb 8, 1995 | 9 km ESE of Hubbard, Oregon | M3.8 | 78 km | 24 km |
| Aug 3, 2006 | 2 km WNW of Cherry Grove, Washington | M3.8 | 147 km | 14 km |
| Mar 20, 2012 | 29 km WNW of Yachats, Oregon | M3.7 | 96 km | 33 km |
| Jun 8, 1993 | 5 km ESE of Scotts Mills, Oregon | M3.7 | 74 km | 19 km |
| Feb 24, 1999 | 8 km WSW of Molalla, Oregon | M3.6 | 77 km | 34 km |
| Jul 3, 1992 | 57 km W of Waldport, Oregon | M3.6 | 119 km | 21 km |
| May 19, 2019 | 3 km ESE of Rose Lodge, Oregon | M3.6 | 65 km | 44 km |
| Sep 8, 2012 | 8 km N of Scotts Mills, Oregon | M3.5 | 77 km | 24 km |
| Aug 2, 1996 | 4 km S of Scotts Mills, Oregon | M3.5 | 68 km | 29 km |
| Jul 22, 1991 | 8 km N of Bethany, Oregon | M3.5 | 123 km | 19 km |
| Nov 25, 1999 | 5 km NNE of Mount Angel, Oregon | M3.4 | 72 km | 28 km |
| Apr 7, 2014 | 6 km NW of Sherwood, Oregon | M3.3 | 97 km | 19 km |
| Jul 13, 2004 | 32 km W of Yachats, Oregon | M3.3 | 101 km | 29 km |
| Mar 4, 2006 | 16 km ENE of Siletz, Oregon | M3.3 | 40 km | 43 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tornado History
42 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF2. Total: 3 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Dec 14, 2010 | EF2 | 44 km | 5.0 mi | 0 |
| Dec 8, 1993 | EF2 | 83 km | 6.0 mi | 0 |
| Sep 1, 2017 | EF1 | 46 km | 0.7 mi | 0 |
| Jun 13, 2013 | EF1 | 72 km | 0.3 mi | 0 |
| Jun 21, 2003 | EF1 | 32 km | 0.3 mi | 0 |
| Oct 9, 2000 | EF1 | 83 km | 0.1 mi | 0 |
| Nov 12, 1991 | EF1 | 98 km | 0.2 mi | 0 |
| Nov 24, 1989 | EF1 | 65 km | 0.3 mi | 0 |
| Mar 8, 1960 | EF1 | 39 km | 1.0 mi | 0 |
| Dec 6, 1951 | EF1 | 44 km | 0.3 mi | 0 |
| Oct 31, 2024 | EF0 | 61 km | 0.2 mi | 0 |
| Jun 18, 2023 | EF0 | 34 km | 0.3 mi | 0 |
| Oct 24, 2022 | EF0 | 72 km | 0.0 mi | 0 |
| Oct 29, 2018 | EF0 | 31 km | 0.1 mi | 0 |
| Oct 12, 2017 | EF0 | 86 km | 0.6 mi | 0 |
| Apr 14, 2015 | EF0 | 65 km | 0.1 mi | 0 |
| Nov 6, 2009 | EF0 | 76 km | 0.1 mi | 0 |
| Jun 4, 2009 | EF0 | 11 km | 1.5 mi | 0 |
| Sep 28, 2007 | EF0 | 30 km | 1.0 mi | 0 |
| Dec 16, 2006 | EF0 | 59 km | 1.5 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Tsunami History
1 tsunami recorded within 500 km.
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1700 | CASCADIA SUBDUCTION ZONE | Earthquake | — | 2 | 144 km |
Source: NOAA/NCEI Historical Tsunami Database.
Nearby Volcanoes
11 volcanoes within 200 km. Closest: Sand Mountain Field (109 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Sand Mountain Field | Pyroclastic cone(s) | 1,664 m (5,459 ft) | -950 | 109 km |
| Jefferson | Stratovolcano | 3,199 m (10,495 ft) | 950 | 118 km |
| Belknap | Shield(s) | 2,095 m (6,873 ft) | 480 | 118 km |
| Three Sisters | Complex | 3,159 m (10,364 ft) | 440 | 130 km |
| Bachelor | Stratovolcano | 2,763 m (9,065 ft) | -5800 | 143 km |
| Hood | Stratovolcano | 3,426 m (11,240 ft) | 1866 | 153 km |
| Davis Lake | Volcanic field | 2,163 m (7,096 ft) | -2790 | 161 km |
| West Crater | Volcanic field | 1,329 m (4,360 ft) | -5750 | 173 km |
| Cinnamon Butte | Pyroclastic cone(s) | 1,956 m (6,417 ft) | Unknown | 175 km |
| Newberry | Shield | 2,434 m (7,986 ft) | 690 | 189 km |
| Indian Heaven | Shield(s) | 1,806 m (5,925 ft) | -6250 | 190 km |
Source: Smithsonian Institution Global Volcanism Program (GVP).
Wildfire History
13 wildfires (100+ acres) recorded within 100 km. Largest: BEACHIE CREEK (194,619 acres, 2020).
| Year | Name | Acres Burned | Distance |
| 2020 | BEACHIE CREEK | 194,619 | 78 km |
| 2020 | HOLIDAY FARM | 174,390 | 77 km |
| 2023 | BEDROCK | 31,692 | 89 km |
| 2021 | GALES | 31,655 | 96 km |
| 2023 | LOOKOUT | 25,103 | 98 km |
| 2017 | JONES | 10,260 | 88 km |
| 1987 | ROCKHOUSE | 5,011 | 41 km |
| 2003 | CLARK | 4,905 | 87 km |
| 2011 | MOTHER LODE | 2,881 | 99 km |
| 2020 | ECHO MTN COMPLEX | 2,161 | 71 km |
| 1999 | AUSTA | 1,525 | 70 km |
| 1987 | 87552212 | 1,166 | 26 km |
| 1987 | 87791147 | 1,048 | 66 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 41°F (5°C) | 7.6 in | |
| February | 43°F (6°C) | 6.3 in | |
| March | 47°F (8°C) | 5.2 in | |
| April | 50°F (10°C) | 3.4 in | |
| May | 55°F (13°C) | 2.4 in | |
| June | 61°F (16°C) | 1.5 in | |
| July | 68°F (20°C) | 0.6 in | Warmest, Driest |
| August | 66°F (19°C) | 0.8 in | |
| September | 62°F (17°C) | 1.7 in | |
| October | 54°F (12°C) | 3.4 in | |
| November | 45°F (7°C) | 7.8 in | |
| December | 40°F (5°C) | 8.8 in | Coldest, Wettest |
Corvallis has a seasonal temperature swing of 27°F / from 40°F in December to 68°F in July. Total annual precipitation is 49.7 inches, with December being the wettest month (8.8") and July the driest (0.6").