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Weather & Climate in McMillin, WA
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
McMillin experiences four distinct seasons with an average annual temperature of 51°F (10°C). Winters average 40°F in January while summers reach 64°F in July. The area gets 240 sunny days per year, above the national average. Annual precipitation totals 45.1 inches. The area receives 5.6 inches of snow annually. 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 138 feet.
Temperature
40°F Jan (4°C)
64°F Jul (18°C)
| Annual Average | 50.5°F |
| 6% below US avg | |
| January Average | 40°F (4°C) |
| July Average | 64°F (18°C) |
| Sunny Days | 240 days/yr |
Geography
| Elevation | 138 ft (42 m) |
| Area | 0.6 sq mi (1.7 km²) |
| Population Density | 777/sq mi |
| Coordinates | 47.1260°N, 122.2353°W |
| Timezone | America/Los_Angeles |
| County | Pierce County County |
| Nearest Airport | Seattle-Tacoma International (SEA) 23 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 28.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively High |
| Risk Score | 98.5 / 100 |
| Social Vulnerability | 14.4 / 100 |
| Community Resilience | 60.1 / 100 |
Hazard Breakdown
| Tornado | Relatively Low |
| Earthquake | Relatively High |
| Wildfire | Relatively Low |
| Flood | Relatively High |
| Hail | Very Low |
| Strong Wind | Relatively Low |
| Heat Wave | Relatively High |
| Winter Weather | Relatively Moderate |
| Lightning | Relatively High |
| Ice Storm | Relatively High |
| Drought | Very Low |
| Cold Wave | Relatively High |
| Landslide | Relatively Moderate |
| Coastal Flood | Relatively Moderate |
| Tsunami | Relatively Low |
| Volcano | Relatively High |
| Avalanche | Very High |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
1,415 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 | 37 km | 52 km |
| Jul 3, 1999 | 8 km N of Satsop, Washington | M5.8 | 93 km | 40 km |
| May 3, 1996 | 8 km NNE of Lake Marcel-Stillwater, Washington | M5.4 | 76 km | 4 km |
| Jan 29, 1995 | 3 km WSW of Des Moines, Washington | M5.0 | 31 km | 15 km |
| Jun 10, 2001 | 18 km N of Satsop, Washington | M5.0 | 96 km | 40 km |
| Jun 23, 1997 | 2 km NE of Enetai, Washington | M4.9 | 58 km | 13 km |
| Apr 25, 2003 | 26 km W of Brinnon, Washington | M4.8 | 98 km | 51 km |
| Jan 30, 2009 | 6 km ESE of Lofall, Washington | M4.7 | 78 km | 62 km |
| Jul 12, 2019 | 2 km S of Roosevelt, Washington | M4.6 | 85 km | 29 km |
| Feb 14, 2011 | 31 km S of Morton, Washington | M4.3 | 94 km | 4 km |
| Jul 22, 2001 | 4 km WSW of DuPont, Washington | M4.3 | 34 km | 52 km |
| Jun 18, 1994 | 11 km SE of Skykomish, Washington | M4.3 | 91 km | -1 km |
| Jun 27, 2013 | 25 km N of Leavenworth, Washington | M4.3 | 140 km | 8 km |
| Feb 18, 2015 | 15 km ENE of Cle Elum, Washington | M4.2 | 113 km | 4 km |
| May 20, 1995 | 15 km NNE of Ashford, Washington | M4.1 | 35 km | 12 km |
| Feb 23, 2017 | 11 km NE of Hoodsport, Washington | M4.1 | 72 km | 15 km |
| Aug 16, 2004 | 16 km ENE of Packwood, Washington | M4.0 | 77 km | -1 km |
| Jun 15, 1994 | 1 km WNW of Hoodsport, Washington | M4.0 | 77 km | 44 km |
| Jul 1, 2009 | 4 km SE of Coupeville, Washington | M4.0 | 123 km | 58 km |
| Aug 8, 2023 | 9 km NNE of Snoqualmie, Washington | M3.9 | 64 km | 16 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tornado History
28 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 | 52 km | 1.4 mi | 0 |
| Nov 10, 1965 | EF2 | 69 km | 1.5 mi | 0 |
| Oct 18, 2019 | EF1 | 56 km | 0.7 mi | 0 |
| Jan 18, 2015 | EF1 | 35 km | 4.1 mi | 0 |
| Sep 30, 2013 | EF1 | 11 km | 1.0 mi | 0 |
| Sep 6, 2009 | EF1 | 10 km | 9.6 mi | 0 |
| May 27, 2004 | EF1 | 62 km | 0.2 mi | 0 |
| Jun 27, 2001 | EF1 | 7 km | 2.3 mi | 0 |
| May 31, 1997 | EF1 | 20 km | 0.5 mi | 0 |
| Jun 12, 1978 | EF1 | 10 km | 1.5 mi | 0 |
| Dec 22, 1971 | EF1 | 31 km | 0.5 mi | 0 |
| Oct 26, 1971 | EF1 | 97 km | 3.0 mi | 0 |
| Sep 28, 1962 | EF1 | 42 km | 0.1 mi | 0 |
| Apr 27, 2014 | EF0 | 29 km | 0.2 mi | 0 |
| May 27, 2011 | EF0 | 79 km | 0.1 mi | 0 |
| Oct 25, 2010 | EF0 | 82 km | 0.0 mi | 0 |
| Jun 16, 2006 | EF0 | 91 km | 0.5 mi | 0 |
| Jan 28, 2006 | EF0 | 41 km | 0.5 mi | 0 |
| Oct 15, 2003 | EF0 | 35 km | 0.1 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Tsunami History
6 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 | 103 km |
| 1894 | PUYALLUP RIVER DELTA, TACOMA, WA | Meteorological | 3.0 m | 2 | 24 km |
| 1891 | WASHINGTON | Eruption + Earthquake | 2.4 m | — | 136 km |
| 1949 | PUGET SOUND, WA | Meteorological | 2.4 m | — | 30 km |
| 1949 | PUGET SOUND, WA | Eruption + Earthquake | — | 8 | 29 km |
| 1820 | CAMANO ISLAND, WA | Meteorological | — | — | 104 km |
Source: NOAA/NCEI Historical Tsunami Database.
Nearby Volcanoes
8 volcanoes within 200 km. Closest: Rainier (47 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Rainier | Stratovolcano | 4,392 m (14,409 ft) | 1450 | 47 km |
| St. Helens | Stratovolcano | 2,549 m (8,363 ft) | 2008 | 103 km |
| Adams | Stratovolcano | 3,742 m (12,277 ft) | 950 | 117 km |
| Indian Heaven | Shield(s) | 1,806 m (5,925 ft) | -6250 | 137 km |
| Glacier Peak | Stratovolcano | 3,213 m (10,541 ft) | 1700 | 138 km |
| West Crater | Volcanic field | 1,329 m (4,360 ft) | -5750 | 139 km |
| Baker | Stratovolcano(es) | 3,285 m (10,778 ft) | 1880 | 186 km |
| Hood | Stratovolcano | 3,426 m (11,240 ft) | 1866 | 199 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 | 92 km |
| 2017 | NORSE PEAK | 51,017 | 65 km |
| 2017 | JOLLY MOUNTAIN | 38,159 | 98 km |
| 2022 | BOLT CREEK | 15,211 | 94 km |
| 2022 | GOAT ROCKS | 6,658 | 75 km |
| 2018 | MIRIAM | 5,719 | 89 km |
| 2017 | AMERICAN | 3,794 | 73 km |
| 2007 | BOOMER | 3,586 | 100 km |
| 2018 | MAPLE | 3,547 | 85 km |
| 2019 | LEFT HAND | 3,235 | 98 km |
| 2015 | MEEKS TABLE | 2,387 | 96 km |
| 2022 | LOCH KATRINE | 2,163 | 73 km |
| 1988 | FALLS CREEK | 2,152 | 68 km |
| 2013 | MANASTASH RIDGE | 1,534 | 94 km |
| 2011 | BIG HUMP | 1,400 | 91 km |
| 1985 | BEAVER | 1,107 | 96 km |
| 2013 | CONRAD LAKE | 1,106 | 98 km |
| 2006 | POLLALIE | 1,070 | 91 km |
| 2017 | SAWMILL CREEK | 1,056 | 61 km |
| 2006 | BEAR GULCH II | 1,037 | 90 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 40°F (4°C) | 6.5 in | |
| February | 41°F (5°C) | 5.2 in | |
| March | 44°F (7°C) | 4.7 in | |
| April | 48°F (9°C) | 3.9 in | |
| May | 54°F (12°C) | 2.7 in | |
| June | 59°F (15°C) | 2.3 in | |
| July | 64°F (18°C) | 1.2 in | Driest |
| August | 65°F (18°C) | 1.5 in | Warmest |
| September | 59°F (15°C) | 2.3 in | |
| October | 51°F (11°C) | 3.8 in | |
| November | 43°F (6°C) | 7.1 in | Wettest |
| December | 39°F (4°C) | 6.8 in | Coldest |
McMillin has a seasonal temperature swing of 26°F / from 39°F in December to 65°F in August. Total annual precipitation is 47.8 inches, with November being the wettest month (7.1") and July the driest (1.2").