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Weather & Climate in Philomath, OR
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Philomath experiences four distinct seasons with an average annual temperature of 50°F (10°C). Winters average 38°F in January while summers reach 64°F in July. The area gets 251 sunny days per year, above the national average. Annual precipitation totals 68.8 inches (wetter than the 38-inch national average). The area receives 5.3 inches of snow annually. Air quality is rated Good with a median AQI of 32. The city sits at an elevation of 279 feet.
Temperature
38°F Jan (3°C)
64°F Jul (18°C)
| Annual Average | 49.8°F |
| 8% below US avg | |
| January Average | 38°F (3°C) |
| July Average | 64°F (18°C) |
| Sunny Days | 251 days/yr |
Geography
| Elevation | 279 ft (85 m) |
| Area | 0.8 sq mi (2.0 km²) |
| Population Density | 2,688/sq mi |
| Coordinates | 44.5420°N, 123.3595°W |
| Timezone | America/Los_Angeles |
| County | Benton County County |
| Nearest Airport | Mahlon Sweet Field (EUG) 30 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 32.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively Moderate |
| Risk Score | 84.4 / 100 |
| Social Vulnerability | 18.5 / 100 |
| Community Resilience | 97.0 / 100 |
Hazard Breakdown
| Tornado | Very Low |
| Earthquake | Relatively Moderate |
| 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 | Very Low |
| Cold Wave | Very Low |
| Landslide | Relatively Moderate |
| Coastal Flood | No Rating |
| Volcano | Very Low |
| Avalanche | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
123 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 | 81 km | 20 km |
| Jul 12, 2004 | 30 km W of Yachats, Oregon | M4.9 | 93 km | 29 km |
| Aug 19, 2004 | 19 km W of Newport, Oregon | M4.7 | 76 km | 27 km |
| Jul 4, 2015 | 16 km ENE of Springfield, Oregon | M4.1 | 66 km | 8 km |
| Apr 24, 2003 | 3 km NW of North Portland, Oregon | M3.9 | 131 km | 17 km |
| Apr 15, 2017 | 43 km WNW of Yachats, Oregon | M3.9 | 101 km | 38 km |
| Feb 8, 1995 | 9 km ESE of Hubbard, Oregon | M3.8 | 84 km | 24 km |
| Mar 20, 2012 | 29 km WNW of Yachats, Oregon | M3.7 | 89 km | 33 km |
| Jun 8, 1993 | 5 km ESE of Scotts Mills, Oregon | M3.7 | 81 km | 19 km |
| Feb 24, 1999 | 8 km WSW of Molalla, Oregon | M3.6 | 84 km | 34 km |
| Jul 3, 1992 | 57 km W of Waldport, Oregon | M3.6 | 113 km | 21 km |
| May 19, 2019 | 3 km ESE of Rose Lodge, Oregon | M3.6 | 63 km | 44 km |
| Sep 8, 2012 | 8 km N of Scotts Mills, Oregon | M3.5 | 83 km | 24 km |
| Aug 2, 1996 | 4 km S of Scotts Mills, Oregon | M3.5 | 75 km | 29 km |
| Jul 22, 1991 | 8 km N of Bethany, Oregon | M3.5 | 128 km | 19 km |
| Nov 25, 1999 | 5 km NNE of Mount Angel, Oregon | M3.4 | 79 km | 28 km |
| Apr 7, 2014 | 6 km NW of Sherwood, Oregon | M3.3 | 102 km | 19 km |
| Jul 13, 2004 | 32 km W of Yachats, Oregon | M3.3 | 94 km | 29 km |
| Mar 4, 2006 | 16 km ENE of Siletz, Oregon | M3.3 | 37 km | 43 km |
| Jul 12, 2007 | 1 km N of Barlow, Oregon | M3.2 | 95 km | 23 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tornado History
41 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF2. Total: 3 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Dec 14, 2010 | EF2 | 50 km | 5.0 mi | 0 |
| Dec 8, 1993 | EF2 | 88 km | 6.0 mi | 0 |
| Sep 1, 2017 | EF1 | 52 km | 0.7 mi | 0 |
| Jun 13, 2013 | EF1 | 76 km | 0.3 mi | 0 |
| Jun 21, 2003 | EF1 | 37 km | 0.3 mi | 0 |
| Oct 9, 2000 | EF1 | 89 km | 0.1 mi | 0 |
| Nov 24, 1989 | EF1 | 64 km | 0.3 mi | 0 |
| Mar 8, 1960 | EF1 | 46 km | 1.0 mi | 0 |
| Dec 6, 1951 | EF1 | 42 km | 0.3 mi | 0 |
| Oct 31, 2024 | EF0 | 55 km | 0.2 mi | 0 |
| Jun 18, 2023 | EF0 | 36 km | 0.3 mi | 0 |
| Oct 24, 2022 | EF0 | 78 km | 0.0 mi | 0 |
| Oct 29, 2018 | EF0 | 38 km | 0.1 mi | 0 |
| Oct 12, 2017 | EF0 | 92 km | 0.6 mi | 0 |
| Apr 14, 2015 | EF0 | 64 km | 0.1 mi | 0 |
| Nov 6, 2009 | EF0 | 73 km | 0.1 mi | 0 |
| Jun 4, 2009 | EF0 | 14 km | 1.5 mi | 0 |
| Sep 28, 2007 | EF0 | 37 km | 1.0 mi | 0 |
| Dec 16, 2006 | EF0 | 65 km | 1.5 mi | 0 |
| Jun 18, 2004 | EF0 | 98 km | 0.1 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Tsunami History
1 tsunami recorded within 500 km.
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1700 | CASCADIA SUBDUCTION ZONE | Earthquake | — | 2 | 139 km |
Source: NOAA/NCEI Historical Tsunami Database.
Nearby Volcanoes
11 volcanoes within 200 km. Closest: Sand Mountain Field (115 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Sand Mountain Field | Pyroclastic cone(s) | 1,664 m (5,459 ft) | -950 | 115 km |
| Belknap | Shield(s) | 2,095 m (6,873 ft) | 480 | 124 km |
| Jefferson | Stratovolcano | 3,199 m (10,495 ft) | 950 | 124 km |
| Three Sisters | Complex | 3,159 m (10,364 ft) | 440 | 135 km |
| Bachelor | Stratovolcano | 2,763 m (9,065 ft) | -5800 | 147 km |
| Hood | Stratovolcano | 3,426 m (11,240 ft) | 1866 | 160 km |
| Davis Lake | Volcanic field | 2,163 m (7,096 ft) | -2790 | 164 km |
| Cinnamon Butte | Pyroclastic cone(s) | 1,956 m (6,417 ft) | Unknown | 176 km |
| West Crater | Volcanic field | 1,329 m (4,360 ft) | -5750 | 179 km |
| Newberry | Shield | 2,434 m (7,986 ft) | 690 | 193 km |
| Indian Heaven | Shield(s) | 1,806 m (5,925 ft) | -6250 | 196 km |
Source: Smithsonian Institution Global Volcanism Program (GVP).
Wildfire History
11 wildfires (100+ acres) recorded within 100 km. Largest: BEACHIE CREEK (194,619 acres, 2020).
| Year | Name | Acres Burned | Distance |
| 2020 | BEACHIE CREEK | 194,619 | 85 km |
| 2020 | HOLIDAY FARM | 174,390 | 81 km |
| 2023 | BEDROCK | 31,692 | 91 km |
| 2021 | GALES | 31,655 | 99 km |
| 2017 | JONES | 10,260 | 90 km |
| 1987 | ROCKHOUSE | 5,011 | 42 km |
| 2003 | CLARK | 4,905 | 89 km |
| 2020 | ECHO MTN COMPLEX | 2,161 | 69 km |
| 1999 | AUSTA | 1,525 | 64 km |
| 1987 | 87552212 | 1,166 | 28 km |
| 1987 | 87791147 | 1,048 | 70 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 38°F (3°C) | 11.4 in | Coldest |
| February | 42°F (6°C) | 9.2 in | |
| March | 45°F (7°C) | 8.1 in | |
| April | 48°F (9°C) | 5.0 in | |
| May | 53°F (12°C) | 3.2 in | |
| June | 58°F (15°C) | 2.0 in | |
| July | 64°F (18°C) | 0.8 in | Warmest, Driest |
| August | 64°F (18°C) | 1.1 in | |
| September | 60°F (16°C) | 2.4 in | |
| October | 53°F (11°C) | 5.0 in | |
| November | 44°F (7°C) | 11.3 in | |
| December | 39°F (4°C) | 12.9 in | Wettest |
Philomath has a seasonal temperature swing of 27°F / from 38°F in January to 64°F in July. Total annual precipitation is 72.5 inches, with December being the wettest month (12.9") and July the driest (0.8").