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Weather & Climate in Brinnon, WA
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Brinnon experiences four distinct seasons with an average annual temperature of 51°F (10°C). Winters average 39°F in January while summers reach 64°F in July. The area gets 253 sunny days per year, above the national average. Air quality is rated Good with a median AQI of 28 / among the cleanest air in the country. The city sits at an elevation of 348 feet.
Temperature
39°F Jan (4°C)
64°F Jul (18°C)
| Annual Average | 50.6°F |
| 6% below US avg | |
| January Average | 39°F (4°C) |
| July Average | 64°F (18°C) |
| Sunny Days | 253 days/yr |
Geography
| Elevation | 348 ft (106 m) |
| Area | 3.8 sq mi (9.9 km²) |
| Population Density | 81/sq mi |
| Coordinates | 47.6686°N, 122.9166°W |
| Timezone | America/Los_Angeles |
| County | Kitsap County County |
| Nearest Airport | Jefferson County International (TWD) 27 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 28.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively Moderate |
| Risk Score | 92.3 / 100 |
| Social Vulnerability | 12.2 / 100 |
| Community Resilience | 72.9 / 100 |
Hazard Breakdown
| Tornado | Very Low |
| Earthquake | Relatively High |
| 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 | No Rating |
| Cold Wave | No Rating |
| Landslide | Relatively High |
| Coastal Flood | Relatively Moderate |
| Tsunami | Relatively Low |
| Volcano | Very Low |
| Avalanche | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
731 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M6.8.
| Feb 28, 2001 | 7 km SSE of Longbranch, Washington | M6.8 | 60 km | 52 km |
| Jul 3, 1999 | 8 km N of Satsop, Washington | M5.8 | 78 km | 40 km |
| May 3, 1996 | 8 km NNE of Lake Marcel-Stillwater, Washington | M5.4 | 79 km | 4 km |
| Jan 29, 1995 | 3 km WSW of Des Moines, Washington | M5.0 | 52 km | 15 km |
| Apr 14, 1990 | 4 km ENE of Deming, Washington | M5.0 | 142 km | 12 km |
| Jun 10, 2001 | 18 km N of Satsop, Washington | M5.0 | 71 km | 40 km |
| Jun 23, 1997 | 2 km NE of Enetai, Washington | M4.9 | 27 km | 13 km |
| Apr 25, 2003 | 26 km W of Brinnon, Washington | M4.8 | 25 km | 51 km |
| Jan 30, 2009 | 6 km ESE of Lofall, Washington | M4.7 | 28 km | 62 km |
| Jul 12, 2019 | 2 km S of Roosevelt, Washington | M4.6 | 71 km | 29 km |
| Mar 3, 2025 | 2025 Orcas Island, Washington | M4.5 | 105 km | 16 km |
| Jul 22, 2001 | 4 km WSW of DuPont, Washington | M4.3 | 67 km | 52 km |
| Jun 18, 1994 | 11 km SE of Skykomish, Washington | M4.3 | 124 km | -1 km |
| Apr 2, 1990 | 2 km ENE of Deming, Washington | M4.3 | 140 km | 0 km |
| Sep 21, 2002 | 9 km SW of Friday Harbor, Washington | M4.1 | 92 km | 23 km |
| May 20, 1995 | 15 km NNE of Ashford, Washington | M4.1 | 114 km | 12 km |
| Feb 23, 2017 | 11 km NE of Hoodsport, Washington | M4.1 | 23 km | 15 km |
| Jun 15, 1994 | 1 km WNW of Hoodsport, Washington | M4.0 | 34 km | 44 km |
| Apr 3, 1990 | 3 km ENE of Deming, Washington | M4.0 | 141 km | 1 km |
| Apr 14, 1990 | 2 km ESE of Deming, Washington | M4.0 | 139 km | 3 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tornado History
29 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF3. Total: 1 injury.
| Date | Rating | Distance | Path | Fatalities |
| Dec 12, 1969 | EF3 | 43 km | 3.8 mi | 0 |
| Dec 18, 2018 | EF2 | 28 km | 1.4 mi | 0 |
| May 13, 1986 | EF2 | 89 km | 0.3 mi | 0 |
| Nov 24, 1970 | EF2 | 72 km | 0.3 mi | 0 |
| Oct 10, 2020 | EF1 | 84 km | 0.5 mi | 0 |
| Oct 18, 2019 | EF1 | 44 km | 0.7 mi | 0 |
| Jan 18, 2015 | EF1 | 45 km | 4.1 mi | 0 |
| Sep 30, 2013 | EF1 | 77 km | 1.0 mi | 0 |
| Sep 6, 2009 | EF1 | 79 km | 9.6 mi | 0 |
| May 18, 2005 | EF1 | 77 km | 0.2 mi | 0 |
| May 27, 2004 | EF1 | 93 km | 0.2 mi | 0 |
| Jun 27, 2001 | EF1 | 78 km | 2.3 mi | 0 |
| May 31, 1997 | EF1 | 60 km | 0.5 mi | 0 |
| Jun 12, 1978 | EF1 | 73 km | 1.5 mi | 0 |
| Dec 22, 1971 | EF1 | 53 km | 0.5 mi | 0 |
| Oct 26, 1971 | EF1 | 82 km | 3.0 mi | 0 |
| Sep 28, 1962 | EF1 | 50 km | 0.1 mi | 0 |
| Jun 16, 2006 | EF0 | 92 km | 0.5 mi | 0 |
| Jan 28, 2006 | EF0 | 78 km | 0.5 mi | 0 |
| Jun 5, 2004 | EF0 | 80 km | 0.1 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Tsunami History
5 tsunamis recorded within 500 km. Highest wave on record: 3.0 m (10 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1894 | PUYALLUP RIVER DELTA, TACOMA, WA | Meteorological | 3.0 m | 2 | 55 km |
| 1891 | WASHINGTON | Eruption + Earthquake | 2.4 m | — | 57 km |
| 1949 | PUGET SOUND, WA | Meteorological | 2.4 m | — | 50 km |
| 1949 | PUGET SOUND, WA | Eruption + Earthquake | — | 8 | 60 km |
| 1820 | CAMANO ISLAND, WA | Meteorological | — | — | 60 km |
Source: NOAA/NCEI Historical Tsunami Database.
Nearby Volcanoes
5 volcanoes within 200 km. Closest: Rainier (126 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Rainier | Stratovolcano | 4,392 m (14,409 ft) | 1450 | 126 km |
| Glacier Peak | Stratovolcano | 3,213 m (10,541 ft) | 1700 | 143 km |
| Baker | Stratovolcano(es) | 3,285 m (10,778 ft) | 1880 | 148 km |
| St. Helens | Stratovolcano | 2,549 m (8,363 ft) | 2008 | 173 km |
| Adams | Stratovolcano | 3,742 m (12,277 ft) | 950 | 195 km |
Source: Smithsonian Institution Global Volcanism Program (GVP).
Wildfire History
8 wildfires (100+ acres) recorded within 100 km. Largest: DELABARRE (4,176 acres, 2023).
| Year | Name | Acres Burned | Distance |
| 2023 | DELABARRE | 4,176 | 42 km |
| 2018 | MAPLE | 3,547 | 20 km |
| 2015 | PARADISE | 2,818 | 66 km |
| 2016 | HAYES TWO | 2,679 | 39 km |
| 2022 | LOCH KATRINE | 2,163 | 96 km |
| 2011 | BIG HUMP | 1,400 | 15 km |
| 1985 | BEAVER | 1,107 | 36 km |
| 2006 | BEAR GULCH II | 1,037 | 34 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 39°F (4°C) | 8.8 in | |
| February | 40°F (4°C) | 6.9 in | |
| March | 42°F (5°C) | 6.5 in | |
| April | 45°F (7°C) | 4.2 in | |
| May | 50°F (10°C) | 3.1 in | |
| June | 55°F (13°C) | 2.3 in | |
| July | 64°F (18°C) | 1.3 in | Warmest, Driest |
| August | 60°F (16°C) | 1.6 in | |
| September | 56°F (13°C) | 2.5 in | |
| October | 49°F (9°C) | 5.2 in | |
| November | 42°F (5°C) | 9.3 in | |
| December | 37°F (3°C) | 10.0 in | Coldest, Wettest |
Brinnon has a seasonal temperature swing of 27°F / from 37°F in December to 64°F in July. Total annual precipitation is 61.9 inches, with December being the wettest month (10.0") and July the driest (1.3").