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Weather & Climate in Cottage Grove, OR
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Cottage Grove experiences four distinct seasons with an average annual temperature of 52°F (11°C). Winters average 41°F in January while summers reach 67°F in July. The area gets 246 sunny days per year, above the national average. Annual precipitation totals 46.5 inches (wetter than the 38-inch national average). The area receives 2.7 inches of snow annually. Air quality is rated Good with a median AQI of 32. The city sits at an elevation of 650 feet.
Temperature
41°F Jan (5°C)
67°F Jul (19°C)
| Annual Average | 52.3°F |
| 3% below US avg | |
| January Average | 41°F (5°C) |
| July Average | 67°F (19°C) |
| Sunny Days | 246 days/yr |
Geography
| Elevation | 650 ft (198 m) |
| Area | 1.5 sq mi (3.8 km²) |
| Population Density | 2,740/sq mi |
| Coordinates | 43.7959°N, 123.0572°W |
| Timezone | America/Los_Angeles |
| County | Douglas County County |
| Nearest Airport | Mahlon Sweet Field (EUG) 24 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 32.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively Moderate |
| Risk Score | 92.9 / 100 |
| Social Vulnerability | 79.1 / 100 |
| Community Resilience | 44.3 / 100 |
Hazard Breakdown
| Tornado | Very Low |
| Earthquake | Relatively Moderate |
| Wildfire | Relatively High |
| Flood | Relatively High |
| Hail | Very Low |
| Strong Wind | Relatively Low |
| Heat Wave | Relatively Moderate |
| Winter Weather | Relatively Moderate |
| Lightning | Relatively Low |
| Ice Storm | Relatively Moderate |
| Drought | Very Low |
| Cold Wave | Very Low |
| Landslide | Relatively Moderate |
| Coastal Flood | Relatively Moderate |
| Tsunami | Very Low |
| Volcano | Relatively Low |
| Avalanche | Relatively Moderate |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
80 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 | 142 km | 20 km |
| Jul 12, 2004 | 30 km W of Yachats, Oregon | M4.9 | 129 km | 29 km |
| Aug 19, 2004 | 19 km W of Newport, Oregon | M4.7 | 138 km | 27 km |
| Jul 4, 2015 | 16 km ENE of Springfield, Oregon | M4.1 | 37 km | 8 km |
| Apr 15, 2017 | 43 km WNW of Yachats, Oregon | M3.9 | 144 km | 38 km |
| Mar 20, 2012 | 29 km WNW of Yachats, Oregon | M3.7 | 129 km | 33 km |
| Jun 8, 1993 | 5 km ESE of Scotts Mills, Oregon | M3.7 | 142 km | 19 km |
| May 19, 2019 | 3 km ESE of Rose Lodge, Oregon | M3.6 | 147 km | 44 km |
| Aug 2, 1996 | 4 km S of Scotts Mills, Oregon | M3.5 | 137 km | 29 km |
| Nov 25, 1999 | 5 km NNE of Mount Angel, Oregon | M3.4 | 149 km | 28 km |
| Mar 4, 2006 | 16 km ENE of Siletz, Oregon | M3.3 | 119 km | 43 km |
| Jul 13, 2004 | 32 km W of Yachats, Oregon | M3.3 | 132 km | 29 km |
| Mar 25, 1993 | 5 km ESE of Scotts Mills, Oregon | M3.2 | 142 km | 13 km |
| Mar 20, 2012 | 27 km WNW of Yachats, Oregon | M3.2 | 127 km | 29 km |
| Jul 21, 2020 | 3 km ESE of Rose Lodge, Oregon | M3.2 | 147 km | 44 km |
| Mar 24, 2013 | 14 km ENE of Butte Falls, Oregon | M3.1 | 142 km | 14 km |
| Mar 12, 2012 | 27 km W of Yachats, Oregon | M3.1 | 127 km | 26 km |
| Mar 26, 1993 | 2 km E of Scotts Mills, Oregon | M3.1 | 143 km | 20 km |
| Dec 30, 2000 | 7 km NNE of Adair Village, Oregon | M3.1 | 105 km | 62 km |
| Apr 15, 2018 | 6 km SSE of Silverton, Oregon | M3.1 | 130 km | 18 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tornado History
14 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF1. Total: 1 injury.
| Date | Rating | Distance | Path | Fatalities |
| Sep 1, 2017 | EF1 | 93 km | 0.7 mi | 0 |
| Nov 24, 1989 | EF1 | 23 km | 0.3 mi | 0 |
| Dec 6, 1951 | EF1 | 45 km | 0.3 mi | 0 |
| Jun 18, 2023 | EF0 | 56 km | 0.3 mi | 0 |
| Apr 14, 2015 | EF0 | 24 km | 0.1 mi | 0 |
| Jun 18, 2013 | EF0 | 64 km | 0.1 mi | 0 |
| Jun 4, 2009 | EF0 | 78 km | 1.5 mi | 0 |
| Sep 28, 2007 | EF0 | 87 km | 1.0 mi | 0 |
| Dec 2, 1999 | EF0 | 14 km | 2.3 mi | 0 |
| Jun 1, 1997 | EF0 | 96 km | 1.5 mi | 0 |
| Dec 5, 1996 | EF0 | 31 km | 0.5 mi | 0 |
| Mar 22, 1994 | EF0 | 93 km | 0.1 mi | 0 |
| May 14, 1984 | EF0 | 44 km | 0.1 mi | 0 |
| Aug 18, 1975 | EF0 | 28 km | 0.1 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Nearby Volcanoes
10 volcanoes within 200 km. Closest: Cinnamon Butte (98 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Cinnamon Butte | Pyroclastic cone(s) | 1,956 m (6,417 ft) | Unknown | 98 km |
| Davis Lake | Volcanic field | 2,163 m (7,096 ft) | -2790 | 103 km |
| Three Sisters | Complex | 3,159 m (10,364 ft) | 440 | 110 km |
| Sand Mountain Field | Pyroclastic cone(s) | 1,664 m (5,459 ft) | -950 | 111 km |
| Belknap | Shield(s) | 2,095 m (6,873 ft) | 480 | 111 km |
| Bachelor | Stratovolcano | 2,763 m (9,065 ft) | -5800 | 112 km |
| Crater Lake | Caldera | 2,487 m (8,159 ft) | -2850 | 123 km |
| Jefferson | Stratovolcano | 3,199 m (10,495 ft) | 950 | 140 km |
| Newberry | Shield | 2,434 m (7,986 ft) | 690 | 147 km |
| Devils Garden | Volcanic field | 1,698 m (5,571 ft) | Unknown | 180 km |
Source: Smithsonian Institution Global Volcanism Program (GVP).
Wildfire History
20 wildfires (100+ acres) recorded within 100 km. Largest: HOLIDAY FARM (174,390 acres, 2020).
| Year | Name | Acres Burned | Distance |
| 2020 | HOLIDAY FARM | 174,390 | 60 km |
| 2022 | CEDAR CREEK MF | 136,357 | 74 km |
| 2020 | ARCHIE CREEK | 131,885 | 50 km |
| 2021 | SMITH | 50,739 | 81 km |
| 2002 | BOULDER | 48,505 | 80 km |
| 2017 | HAPPY DOG | 34,241 | 68 km |
| 2021 | JACK FIRE | 33,747 | 72 km |
| 2023 | BEDROCK | 31,692 | 48 km |
| 2021 | GALES | 31,655 | 55 km |
| 2021 | CHAOS | 29,698 | 44 km |
| 2023 | LOOKOUT | 25,103 | 88 km |
| 2008 | RATTLE | 20,443 | 67 km |
| 2002 | APPLE | 19,139 | 65 km |
| 1996 | SPRING | 15,959 | 65 km |
| 2009 | TUMBLEBUG COMPLEX | 14,605 | 73 km |
| 2018 | TERWILLIGER | 11,400 | 74 km |
| 2002 | BIG BEND | 10,572 | 87 km |
| 2017 | JONES | 10,260 | 49 km |
| 1996 | MOOLACK COMPLEX (CHARLTON) | 10,207 | 84 km |
| 1987 | BLAND MTN | 10,072 | 98 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 41°F (5°C) | 8.3 in | |
| February | 43°F (6°C) | 6.6 in | |
| March | 46°F (8°C) | 6.3 in | |
| April | 49°F (9°C) | 4.4 in | |
| May | 54°F (12°C) | 3.0 in | |
| June | 60°F (15°C) | 1.7 in | |
| July | 67°F (19°C) | 0.7 in | Warmest, Driest |
| August | 66°F (19°C) | 1.1 in | |
| September | 61°F (16°C) | 1.9 in | |
| October | 53°F (12°C) | 4.1 in | |
| November | 45°F (7°C) | 9.1 in | Wettest |
| December | 40°F (4°C) | 9.0 in | Coldest |
Cottage Grove has a seasonal temperature swing of 27°F / from 40°F in December to 67°F in July. Total annual precipitation is 56.3 inches, with November being the wettest month (9.1") and July the driest (0.7").