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Weather & Climate in Greenwater, WA
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Greenwater experiences four distinct seasons with an average annual temperature of 50°F (10°C). Winters average 39°F in January while summers reach 63°F in July. The area gets 226 sunny days per year, above the national average. Annual precipitation totals 60.1 inches (wetter than the 38-inch 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 1,805 feet.
Temperature
39°F Jan (4°C)
63°F Jul (17°C)
| Annual Average | 49.9°F |
| 8% below US avg | |
| January Average | 39°F (4°C) |
| July Average | 63°F (17°C) |
| Sunny Days | 226 days/yr |
Geography
| Elevation | 1,805 ft (550 m) |
| Area | 0.6 sq mi (1.5 km²) |
| Population Density | 95/sq mi |
| Coordinates | 47.1442°N, 121.6285°W |
| Timezone | America/Los_Angeles |
| County | King County County |
| Nearest Airport | Seattle-Tacoma International (SEA) 38 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 28.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Very High |
| Risk Score | 99.7 / 100 |
| Social Vulnerability | 14.8 / 100 |
| Community Resilience | 87.4 / 100 |
Hazard Breakdown
| Tornado | Relatively Moderate |
| Earthquake | Very High |
| Wildfire | Relatively Low |
| Flood | Very High |
| Hail | Very Low |
| Strong Wind | Very Low |
| Heat Wave | Relatively High |
| Winter Weather | Relatively High |
| Lightning | Relatively Moderate |
| Ice Storm | Relatively High |
| Drought | Very Low |
| Cold Wave | Relatively Low |
| Landslide | Relatively High |
| Coastal Flood | Relatively Moderate |
| Tsunami | Relatively Low |
| Volcano | Relatively High |
| Avalanche | Very High |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
1,441 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 | 83 km | 52 km |
| Jul 3, 1999 | 8 km N of Satsop, Washington | M5.8 | 139 km | 40 km |
| May 3, 1996 | 8 km NNE of Lake Marcel-Stillwater, Washington | M5.4 | 71 km | 4 km |
| Jan 29, 1995 | 3 km WSW of Des Moines, Washington | M5.0 | 62 km | 15 km |
| Jun 10, 2001 | 18 km N of Satsop, Washington | M5.0 | 142 km | 40 km |
| Jun 23, 1997 | 2 km NE of Enetai, Washington | M4.9 | 87 km | 13 km |
| Apr 25, 2003 | 26 km W of Brinnon, Washington | M4.8 | 135 km | 51 km |
| Jan 30, 2009 | 6 km ESE of Lofall, Washington | M4.7 | 101 km | 62 km |
| Jul 12, 2019 | 2 km S of Roosevelt, Washington | M4.6 | 86 km | 29 km |
| Jul 22, 2001 | 4 km WSW of DuPont, Washington | M4.3 | 80 km | 52 km |
| Feb 14, 2011 | 31 km S of Morton, Washington | M4.3 | 106 km | 4 km |
| Jun 18, 1994 | 11 km SE of Skykomish, Washington | M4.3 | 60 km | -1 km |
| Jun 27, 2013 | 25 km N of Leavenworth, Washington | M4.3 | 103 km | 8 km |
| Jun 17, 2010 | 30 km S of White Swan, Washington | M4.2 | 134 km | 3 km |
| Feb 18, 2015 | 15 km ENE of Cle Elum, Washington | M4.2 | 67 km | 4 km |
| May 20, 1995 | 15 km NNE of Ashford, Washington | M4.1 | 38 km | 12 km |
| Feb 23, 2017 | 11 km NE of Hoodsport, Washington | M4.1 | 112 km | 15 km |
| Aug 16, 2004 | 16 km ENE of Packwood, Washington | M4.0 | 54 km | -1 km |
| Jun 15, 1994 | 1 km WNW of Hoodsport, Washington | M4.0 | 120 km | 44 km |
| Oct 9, 1998 | 20 km S of White Swan, Washington | M4.0 | 126 km | 2 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tornado History
22 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF3. Total: 1 injury.
| Date | Rating | Distance | Path | Fatalities |
| Dec 12, 1969 | EF3 | 70 km | 3.8 mi | 0 |
| Dec 18, 2018 | EF2 | 86 km | 1.4 mi | 0 |
| Jan 18, 2015 | EF1 | 76 km | 4.1 mi | 0 |
| Sep 30, 2013 | EF1 | 56 km | 1.0 mi | 0 |
| Sep 6, 2009 | EF1 | 39 km | 9.6 mi | 0 |
| Jun 27, 2001 | EF1 | 42 km | 2.3 mi | 0 |
| May 31, 1997 | EF1 | 63 km | 0.5 mi | 0 |
| Jun 12, 1978 | EF1 | 56 km | 1.5 mi | 0 |
| Dec 22, 1971 | EF1 | 60 km | 0.5 mi | 0 |
| Oct 26, 1971 | EF1 | 94 km | 3.0 mi | 0 |
| Sep 28, 1962 | EF1 | 64 km | 0.1 mi | 0 |
| Apr 27, 2014 | EF0 | 57 km | 0.2 mi | 0 |
| Jun 16, 2006 | EF0 | 81 km | 0.5 mi | 0 |
| Jan 28, 2006 | EF0 | 85 km | 0.5 mi | 0 |
| Oct 15, 2003 | EF0 | 77 km | 0.1 mi | 0 |
| Jun 11, 2001 | EF0 | 84 km | — | 0 |
| May 9, 1999 | EF0 | 93 km | — | 0 |
| Aug 24, 1997 | EF0 | 93 km | 0.5 mi | 0 |
| Jun 23, 1996 | EF0 | 68 km | 0.4 mi | 0 |
| Apr 9, 1991 | EF0 | 93 km | 0.8 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Tsunami History
5 tsunamis recorded within 500 km. Highest wave on record: 250.0 m (820 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1980 | WASHINGTON | Explosion | 250.0 m | 61 | 113 km |
| 1894 | PUYALLUP RIVER DELTA, TACOMA, WA | Meteorological | 3.0 m | 2 | 64 km |
| 1949 | PUGET SOUND, WA | Meteorological | 2.4 m | — | 71 km |
| 1949 | PUGET SOUND, WA | Eruption + Earthquake | — | 8 | 75 km |
| 1820 | CAMANO ISLAND, WA | Meteorological | — | — | 116 km |
Source: NOAA/NCEI Historical Tsunami Database.
Nearby Volcanoes
8 volcanoes within 200 km. Closest: Rainier (34 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Rainier | Stratovolcano | 4,392 m (14,409 ft) | 1450 | 34 km |
| Adams | Stratovolcano | 3,742 m (12,277 ft) | 950 | 105 km |
| St. Helens | Stratovolcano | 2,549 m (8,363 ft) | 2008 | 113 km |
| Glacier Peak | Stratovolcano | 3,213 m (10,541 ft) | 1700 | 114 km |
| Indian Heaven | Shield(s) | 1,806 m (5,925 ft) | -6250 | 136 km |
| West Crater | Volcanic field | 1,329 m (4,360 ft) | -5750 | 145 km |
| Baker | Stratovolcano(es) | 3,285 m (10,778 ft) | 1880 | 182 km |
| Hood | Stratovolcano | 3,426 m (11,240 ft) | 1866 | 197 km |
Source: Smithsonian Institution Global Volcanism Program (GVP).
Wildfire History
20 wildfires (100+ acres) recorded within 100 km. Largest: SCHNEIDER SPRINGS (114,743 acres, 2021).
| Year | Name | Acres Burned | Distance |
| 2021 | SCHNEIDER SPRINGS | 114,743 | 52 km |
| 2020 | EVANS CANYON | 76,288 | 83 km |
| 2012 | TABLE MOUNTAIN COMPLEX | 65,887 | 84 km |
| 2017 | NORSE PEAK | 51,017 | 23 km |
| 2024 | RETREAT | 44,681 | 72 km |
| 2017 | JOLLY MOUNTAIN | 38,159 | 54 km |
| 1994 | HATCHERY COMPLEX (RAT) | 27,265 | 82 km |
| 2012 | TAYLOR BRIDGE | 23,987 | 70 km |
| 1985 | ROSA | 19,441 | 94 km |
| 2004 | FISCHER | 16,197 | 97 km |
| 2022 | BOLT CREEK | 15,211 | 71 km |
| 2014 | CHIWAUKUM COMPLEX | 14,511 | 87 km |
| 1994 | HATCHERY COMPLEX (HATCHERY) | 13,976 | 86 km |
| 2014 | SNAG CANYON | 12,508 | 87 km |
| 2014 | COTTONWOOD 2 | 8,644 | 96 km |
| 2012 | CANYON | 8,130 | 98 km |
| 2001 | FOURTH OF JULY | 7,009 | 80 km |
| 2022 | GOAT ROCKS | 6,658 | 57 km |
| 2022 | COW CANYON | 6,083 | 72 km |
| 2010 | COWICHE MILL | 6,051 | 89 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 39°F (4°C) | 12.0 in | |
| February | 33°F (1°C) | 8.7 in | |
| March | 36°F (2°C) | 7.2 in | |
| April | 40°F (4°C) | 5.3 in | |
| May | 46°F (8°C) | 3.9 in | |
| June | 52°F (11°C) | 3.2 in | |
| July | 63°F (17°C) | 1.6 in | Warmest, Driest |
| August | 59°F (15°C) | 1.9 in | |
| September | 53°F (12°C) | 3.7 in | |
| October | 45°F (7°C) | 6.6 in | |
| November | 35°F (2°C) | 11.5 in | |
| December | 30°F (-1°C) | 12.4 in | Coldest, Wettest |
Greenwater has a seasonal temperature swing of 33°F / from 30°F in December to 63°F in July. Total annual precipitation is 77.9 inches, with December being the wettest month (12.4") and July the driest (1.6").