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Weather & Climate in Winchester Bay, OR
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Winchester Bay experiences four distinct seasons with an average annual temperature of 53°F (12°C). Winters average 47°F in January while summers reach 61°F in July / relatively mild seasonal variation. The area gets 261 sunny days per year, well above the U.S. average of 205 / making it one of the sunnier locations in the country. Air quality is rated Good with a median AQI of 32. The city sits at an elevation of 209 feet.
Temperature
47°F Jan (8°C)
61°F Jul (16°C)
| Annual Average | 53.1°F |
| 2% below US avg | |
| January Average | 47°F (8°C) |
| July Average | 61°F (16°C) |
| Sunny Days | 261 days/yr |
Geography
| Elevation | 209 ft (64 m) |
| Area | 1.2 sq mi (3.1 km²) |
| Population Density | 69/sq mi |
| Coordinates | 43.6700°N, 124.1869°W |
| Timezone | America/Los_Angeles |
| County | Coos County County |
| Nearest Airport | Southwest Oregon Regional (OTH) 18 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 32.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively Moderate |
| Risk Score | 91.9 / 100 |
| Social Vulnerability | 67.2 / 100 |
| Community Resilience | 48.2 / 100 |
Hazard Breakdown
| Tornado | Very Low |
| Earthquake | Relatively High |
| Wildfire | Relatively Low |
| Flood | Relatively Moderate |
| Hail | Very Low |
| Strong Wind | Very Low |
| Heat Wave | Relatively Low |
| Winter Weather | Relatively Low |
| Lightning | Relatively Low |
| Ice Storm | Very Low |
| Drought | Very Low |
| Cold Wave | No Rating |
| Landslide | Relatively Moderate |
| Coastal Flood | Relatively High |
| Tsunami | Relatively Moderate |
| Avalanche | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
80 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M5.2.
| Jul 28, 2010 | 129 km WNW of Barview, Oregon | M5.2 | 131 km | 10 km |
| Oct 18, 2024 | 121 km WNW of Barview, Oregon | M5.0 | 127 km | 8 km |
| Jul 12, 2004 | 30 km W of Yachats, Oregon | M4.9 | 78 km | 29 km |
| Aug 19, 2004 | 19 km W of Newport, Oregon | M4.7 | 111 km | 27 km |
| Feb 26, 2009 | 37 km NW of Selma, Oregon | M4.2 | 128 km | 37 km |
| Jul 4, 2015 | 16 km ENE of Springfield, Oregon | M4.1 | 118 km | 8 km |
| Apr 15, 2017 | 43 km WNW of Yachats, Oregon | M3.9 | 92 km | 38 km |
| Apr 22, 2008 | 123 km W of Bandon, Oregon | M3.9 | 143 km | 10 km |
| May 14, 2000 | 121 km W of Winchester Bay, Oregon | M3.9 | 120 km | 10 km |
| Jan 24, 2014 | 31 km SSE of Powers, Oregon | M3.8 | 119 km | 4 km |
| Apr 26, 2018 | 108 km WNW of Barview, Oregon | M3.8 | 111 km | 10 km |
| Mar 20, 2012 | 29 km WNW of Yachats, Oregon | M3.7 | 82 km | 33 km |
| Jul 3, 1992 | 57 km W of Waldport, Oregon | M3.6 | 105 km | 21 km |
| Jul 3, 2010 | near the coast of Oregon | M3.5 | 133 km | 34 km |
| Mar 4, 2006 | 16 km ENE of Siletz, Oregon | M3.3 | 126 km | 43 km |
| Jul 13, 2004 | 32 km W of Yachats, Oregon | M3.3 | 81 km | 29 km |
| Jul 20, 2008 | 84 km W of Bandon, Oregon | M3.2 | 117 km | 10 km |
| Jul 21, 2020 | 3 km ESE of Rose Lodge, Oregon | M3.2 | 150 km | 44 km |
| Mar 20, 2012 | 27 km WNW of Yachats, Oregon | M3.2 | 80 km | 29 km |
| Mar 12, 2012 | 27 km W of Yachats, Oregon | M3.1 | 79 km | 26 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tornado History
8 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF1. Total: 1 injury.
| Date | Rating | Distance | Path | Fatalities |
| Nov 24, 1989 | EF1 | 96 km | 0.3 mi | 0 |
| Dec 6, 1951 | EF1 | 95 km | 0.3 mi | 0 |
| Jun 18, 2013 | EF0 | 76 km | 0.1 mi | 0 |
| Dec 2, 1999 | EF0 | 98 km | 2.3 mi | 0 |
| Dec 5, 1996 | EF0 | 96 km | 0.5 mi | 0 |
| Nov 2, 1984 | EF0 | 85 km | 0.1 mi | 0 |
| May 14, 1984 | EF0 | 97 km | 0.1 mi | 0 |
| Aug 18, 1975 | EF0 | 98 km | 0.1 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Nearby Volcanoes
5 volcanoes within 200 km. Closest: Cinnamon Butte (174 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Cinnamon Butte | Pyroclastic cone(s) | 1,956 m (6,417 ft) | Unknown | 174 km |
| Crater Lake | Caldera | 2,487 m (8,159 ft) | -2850 | 186 km |
| Davis Lake | Volcanic field | 2,163 m (7,096 ft) | -2790 | 191 km |
| Sand Mountain Field | Pyroclastic cone(s) | 1,664 m (5,459 ft) | -950 | 197 km |
| Belknap | Shield(s) | 2,095 m (6,873 ft) | 480 | 200 km |
Source: Smithsonian Institution Global Volcanism Program (GVP).
Wildfire History
3 wildfires (100+ acres) recorded within 100 km. Largest: COUGAR CR. #1 (6,971 acres, 2023).
| Year | Name | Acres Burned | Distance |
| 2023 | COUGAR CR. #1 | 6,971 | 59 km |
| 1999 | AUSTA | 1,525 | 56 km |
| 2023 | LIGHTHOUSE RD #3 | 1,286 | 63 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 47°F (8°C) | 10.8 in | |
| February | 47°F (8°C) | 8.7 in | |
| March | 48°F (9°C) | 8.5 in | |
| April | 50°F (10°C) | 5.2 in | |
| May | 53°F (12°C) | 3.5 in | |
| June | 57°F (14°C) | 2.0 in | |
| July | 61°F (16°C) | 0.7 in | Warmest, Driest |
| August | 60°F (16°C) | 1.1 in | |
| September | 59°F (15°C) | 2.2 in | |
| October | 55°F (13°C) | 5.2 in | |
| November | 50°F (10°C) | 10.8 in | |
| December | 46°F (8°C) | 11.5 in | Coldest, Wettest |
Winchester Bay has a seasonal temperature swing of 15°F / from 46°F in December to 61°F in July. Total annual precipitation is 70.2 inches, with December being the wettest month (11.5") and July the driest (0.7").