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Weather & Climate in De Borgia, MT
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
De Borgia has a cool climate with an average annual temperature of 42°F (6°C). Winters average 24°F in January while summers reach 64°F in July. The area gets 249 sunny days per year, above the national average. Annual precipitation totals 37.0 inches. 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 3,652 feet.
Temperature
24°F Jan (-4°C)
64°F Jul (18°C)
| Annual Average | 42.2°F |
| 22% below US avg | |
| January Average | 24°F (-4°C) |
| July Average | 64°F (18°C) |
| Sunny Days | 249 days/yr |
Geography
| Elevation | 3,652 ft (1,113 m) |
| Area | 2.7 sq mi (7.1 km²) |
| Population Density | 13/sq mi |
| Coordinates | 47.3701°N, 115.3210°W |
| Timezone | America/Denver |
| County | Mineral County County |
| Nearest Airport | Missoula Montana (MSO) 66 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 26.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Very Low |
| Risk Score | 7.4 / 100 |
| Social Vulnerability | 59.2 / 100 |
| Community Resilience | 7.2 / 100 |
Hazard Breakdown
| Tornado | Very Low |
| Earthquake | Very Low |
| Wildfire | Relatively Low |
| Flood | Very Low |
| Hail | Very Low |
| Strong Wind | Very Low |
| Heat Wave | Very Low |
| Winter Weather | Relatively Low |
| Lightning | Very Low |
| Ice Storm | Relatively Low |
| Drought | Very Low |
| Cold Wave | Relatively Low |
| Landslide | Relatively Moderate |
| Avalanche | Relatively Moderate |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
175 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.7.
| Dec 22, 1998 | Idaho-Montana border region | M4.7 | 70 km | 12 km |
| Jun 29, 1995 | 2 km NNW of Kila, Montana | M4.1 | 106 km | 5 km |
| May 2, 1995 | 2 km NW of Kila, Montana | M4.1 | 106 km | 9 km |
| Aug 17, 1994 | 1 km E of Mullan, Idaho | M4.1 | 36 km | 2 km |
| Apr 15, 1998 | 11 km NE of Swan Lake, Montana | M4.1 | 138 km | 4 km |
| Jan 20, 1998 | 15 km SSE of Happys Inn, Montana | M4.0 | 68 km | 7 km |
| Apr 1, 1992 | 10 km ESE of Swan Lake, Montana | M4.0 | 132 km | 5 km |
| Apr 24, 2015 | 8 km WSW of Hope, Idaho | M3.9 | 125 km | 17 km |
| Nov 8, 1997 | 39 km SE of Pierce, Idaho | M3.8 | 125 km | 5 km |
| May 2, 1995 | 3 km WNW of Kila, Montana | M3.8 | 105 km | 9 km |
| Sep 26, 2004 | 14 km WSW of Pablo, Montana | M3.8 | 79 km | 17 km |
| Apr 24, 2015 | 12 km SSW of East Hope, Idaho | M3.7 | 116 km | 9 km |
| Aug 19, 1999 | 12 km ENE of Happys Inn, Montana | M3.7 | 87 km | 14 km |
| Oct 2, 1995 | 18 km E of Finley Point, Montana | M3.7 | 120 km | 5 km |
| Oct 26, 1999 | 23 km WNW of Niarada, Montana | M3.6 | 68 km | 12 km |
| Feb 2, 1997 | 1 km NNE of Lindisfarne, Montana | M3.6 | 96 km | 5 km |
| May 30, 1996 | 3 km SSW of Mullan, Idaho | M3.6 | 38 km | 1 km |
| Mar 14, 1997 | 1 km E of Mullan, Idaho | M3.6 | 36 km | 2 km |
| Jul 18, 1991 | 14 km SSE of Swan Lake, Montana | M3.5 | 128 km | 5 km |
| Jan 20, 2000 | 21 km ENE of Athol, Idaho | M3.5 | 110 km | 5 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tornado History
4 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF0. Total: 3 injuries.
| Date | Rating | Distance | Path | Fatalities |
| May 9, 2023 | EF0 | 95 km | 0.5 mi | 0 |
| Jul 18, 2007 | EF0 | 82 km | 1.0 mi | 0 |
| Jun 5, 1987 | EF0 | 71 km | 0.1 mi | 0 |
| Jul 9, 1978 | EF0 | 27 km | 0.1 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Wildfire History
20 wildfires (100+ acres) recorded within 100 km. Largest: CHIPPY CREEK (95,656 acres, 2007).
| Year | Name | Acres Burned | Distance |
| 2007 | CHIPPY CREEK | 95,656 | 61 km |
| 2021 | THORNE CREEK | 39,694 | 34 km |
| 2003 | FISH CREEK COMPLEX (THOMPSON CREEK) | 33,779 | 73 km |
| 2016 | COPPER KING | 28,338 | 34 km |
| 2017 | SUNRISE | 26,896 | 49 km |
| 2017 | SHEEP GAP | 24,702 | 24 km |
| 2022 | ELMO | 22,148 | 88 km |
| 2023 | NIARADA | 20,686 | 78 km |
| 2000 | UPPER NINEMILE COMPLEX (NINE MILE) | 19,695 | 54 km |
| 2023 | RIVER ROAD EAST | 18,068 | 41 km |
| 2017 | DEEP CREEK | 14,558 | 46 km |
| 2015 | WEST FORK FISH CREEK | 14,495 | 65 km |
| 2023 | MIDDLE RIDGE | 14,459 | 73 km |
| 2017 | MOOSE PEAK | 14,085 | 61 km |
| 2021 | DECEITFUL | 12,750 | 56 km |
| 1984 | HOUGHTON CREEK II | 12,495 | 76 km |
| 2000 | CLEAR CREEK DIVIDE COMPLEX (CLEAR CREEK) | 12,031 | 51 km |
| 2021 | TUMBLEDOWN | 11,269 | 23 km |
| 2015 | SOUTH BOBTAIL | 11,256 | 53 km |
| 2005 | I-90 COMPLEX (TARKIO) | 10,953 | 65 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 24°F (-4°C) | 3.5 in | Wettest |
| February | 27°F (-3°C) | 2.4 in | |
| March | 32°F (0°C) | 2.0 in | |
| April | 39°F (4°C) | 1.8 in | |
| May | 47°F (8°C) | 2.1 in | |
| June | 54°F (12°C) | 2.2 in | |
| July | 64°F (18°C) | 1.0 in | Warmest, Driest |
| August | 61°F (16°C) | 1.4 in | |
| September | 52°F (11°C) | 1.7 in | |
| October | 42°F (6°C) | 1.9 in | |
| November | 31°F (-0°C) | 3.1 in | |
| December | 23°F (-5°C) | 3.2 in | Coldest |
De Borgia has a seasonal temperature swing of 40°F / from 23°F in December to 64°F in July. Total annual precipitation is 26.2 inches, with January being the wettest month (3.5") and July the driest (1.0").