All Countries
Weather & Climate in Eureka, MT
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Eureka experiences four distinct seasons with an average annual temperature of 47°F (8°C). Winters average 26°F in January while summers reach 70°F in July. The area gets 274 sunny days per year, well above the U.S. average of 205 / making it one of the sunnier locations in the country. Annual precipitation totals 15.0 inches (drier than the 38-inch national average). The area receives 35.1 inches of snow annually, a moderate snowfall amount. Air quality is rated Good with a median AQI of 26 / among the cleanest air in the country. The city sits at an elevation of 2,708 feet.
Temperature
26°F Jan (-3°C)
70°F Jul (21°C)
| Annual Average | 47.0°F |
| 13% below US avg | |
| January Average | 26°F (-3°C) |
| July Average | 70°F (21°C) |
| Sunny Days | 274 days/yr |
Geography
| Elevation | 2,708 ft (825 m) |
| Area | 1.3 sq mi (3.4 km²) |
| Population Density | 1,511/sq mi |
| Coordinates | 48.8789°N, 115.0492°W |
| Timezone | America/Denver |
| County | Lincoln County County |
| Nearest Airport | Glacier Park International (FCA) 53 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 26.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively Low |
| Risk Score | 64.3 / 100 |
| Social Vulnerability | 87.2 / 100 |
| Community Resilience | 13.7 / 100 |
Hazard Breakdown
| Tornado | Very Low |
| Earthquake | Relatively Low |
| Wildfire | Relatively Moderate |
| Flood | Relatively Low |
| Hail | Very Low |
| Strong Wind | Very Low |
| Heat Wave | Very Low |
| Winter Weather | Relatively High |
| Lightning | Relatively Low |
| Ice Storm | Relatively Low |
| Drought | Very Low |
| Cold Wave | Relatively Moderate |
| Landslide | Relatively Moderate |
| Avalanche | Relatively High |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
108 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.7.
| Dec 22, 1998 | Idaho-Montana border region | M4.7 | 99 km | 12 km |
| Mar 4, 2000 | 35 km S of Pincher Creek, Canada | M4.6 | 81 km | 1 km |
| Mar 22, 2006 | 8 km SSW of Rexford, Montana | M4.3 | 12 km | 8 km |
| Jun 29, 1995 | 2 km NNW of Kila, Montana | M4.1 | 93 km | 5 km |
| May 2, 1995 | 2 km NW of Kila, Montana | M4.1 | 92 km | 9 km |
| Apr 15, 1998 | 11 km NE of Swan Lake, Montana | M4.1 | 136 km | 4 km |
| Apr 1, 1992 | 10 km ESE of Swan Lake, Montana | M4.0 | 148 km | 5 km |
| Jan 20, 1998 | 15 km SSE of Happys Inn, Montana | M4.0 | 103 km | 7 km |
| Apr 24, 2015 | 8 km WSW of Hope, Idaho | M3.9 | 124 km | 17 km |
| Feb 28, 2000 | 10 km NNE of Sparwood, Canada | M3.8 | 106 km | 10 km |
| May 2, 1995 | 3 km WNW of Kila, Montana | M3.8 | 93 km | 9 km |
| Apr 24, 2015 | 12 km SSW of East Hope, Idaho | M3.7 | 127 km | 9 km |
| Aug 19, 1999 | 12 km ENE of Happys Inn, Montana | M3.7 | 85 km | 14 km |
| Oct 26, 1999 | 23 km WNW of Niarada, Montana | M3.6 | 109 km | 12 km |
| Feb 2, 1997 | 1 km NNE of Lindisfarne, Montana | M3.6 | 133 km | 5 km |
| Jan 20, 2000 | 21 km ENE of Athol, Idaho | M3.5 | 141 km | 5 km |
| Apr 11, 2015 | 5 km NW of Columbia Falls, Montana | M3.5 | 79 km | 13 km |
| Nov 2, 1996 | 4 km W of Trout Creek, Montana | M3.4 | 124 km | 5 km |
| May 25, 1995 | 2 km NW of Kila, Montana | M3.4 | 92 km | 9 km |
| Dec 15, 2012 | 19 km S of Troy, Montana | M3.4 | 89 km | 1 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tornado History
2 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF0.
| Date | Rating | Distance | Path | Fatalities |
| Apr 9, 2008 | EF0 | 90 km | 0.0 mi | 0 |
| Sep 10, 2000 | EF0 | 74 km | 2.0 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Wildfire History
20 wildfires (100+ acres) recorded within 100 km. Largest: MOOSE (73,210 acres, 2001).
| Year | Name | Acres Burned | Distance |
| 2001 | MOOSE | 73,210 | 74 km |
| 2003 | ROBERT | 54,500 | 81 km |
| 2003 | WEDGE CANYON | 51,987 | 49 km |
| 1988 | RED BENCH | 33,845 | 59 km |
| 2007 | BRUSH CREEK | 30,166 | 59 km |
| 2017 | CARIBOU | 28,101 | 25 km |
| 2017 | WEST FORK | 21,154 | 57 km |
| 2003 | TRAPPER CREEK FIRE (TRAPPER CREEK) | 18,028 | 89 km |
| 2017 | SPRAGUE | 16,897 | 94 km |
| 1994 | LITTLE WOLF | 15,714 | 66 km |
| 2018 | HOWE RIDGE | 14,747 | 86 km |
| 2003 | TRAPPER CREEK FIRE (WOLF GUN) | 13,920 | 79 km |
| 2021 | SOUTH YAAK | 12,866 | 69 km |
| 1984 | HOUGHTON CREEK II | 12,495 | 93 km |
| 1999 | ANACONDA | 11,452 | 77 km |
| 1988 | DRY FORK | 11,403 | 49 km |
| 2000 | STONE YOUNG (STONE HILL) | 11,279 | 16 km |
| 1994 | NORTH FORK COMPLEX (ADAIR II) | 10,329 | 72 km |
| 1994 | NORTH FORK COMPLEX (STARVATION) | 8,990 | 57 km |
| 2000 | KOOTENAI COMPLEX (UPPER BEAVER) | 8,783 | 40 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 26°F (-3°C) | 1.7 in | |
| February | 28°F (-2°C) | 1.3 in | |
| March | 36°F (2°C) | 1.2 in | |
| April | 44°F (6°C) | 1.1 in | Driest |
| May | 52°F (11°C) | 2.2 in | |
| June | 59°F (15°C) | 2.4 in | Wettest |
| July | 70°F (21°C) | 1.7 in | Warmest |
| August | 65°F (18°C) | 1.3 in | |
| September | 55°F (13°C) | 1.4 in | |
| October | 44°F (7°C) | 1.2 in | |
| November | 33°F (0°C) | 2.1 in | |
| December | 25°F (-4°C) | 1.7 in | Coldest |
Eureka has a seasonal temperature swing of 45°F / from 25°F in December to 70°F in July. Total annual precipitation is 19.3 inches, with June being the wettest month (2.4") and April the driest (1.1").