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Weather & Climate in Thompson Falls, MT
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Thompson Falls experiences four distinct seasons with an average annual temperature of 48°F (9°C). Winters average 29°F in January while summers reach 70°F in July. The area gets 276 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 22.1 inches (drier than the 38-inch national average). The area receives 15.3 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 2,620 feet.
Temperature
29°F Jan (-2°C)
70°F Jul (21°C)
| Annual Average | 47.7°F |
| 12% below US avg | |
| January Average | 29°F (-2°C) |
| July Average | 70°F (21°C) |
| Sunny Days | 276 days/yr |
Geography
| Elevation | 2,620 ft (799 m) |
| Area | 1.6 sq mi (4.1 km²) |
| Population Density | 980/sq mi |
| Coordinates | 47.5994°N, 115.3426°W |
| Timezone | America/Denver |
| County | Sanders County County |
| Nearest Airport | Glacier Park International (FCA) 70 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 26.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively Low |
| Risk Score | 47.4 / 100 |
| Social Vulnerability | 96.3 / 100 |
| Community Resilience | 18.7 / 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 | Very Low |
| Ice Storm | Relatively Moderate |
| Drought | Very Low |
| Cold Wave | Relatively Moderate |
| Landslide | Relatively Moderate |
| Avalanche | Relatively Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
177 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.7.
| Dec 22, 1998 | Idaho-Montana border region | M4.7 | 45 km | 12 km |
| Mar 22, 2006 | 8 km SSW of Rexford, Montana | M4.3 | 137 km | 8 km |
| Apr 15, 1998 | 11 km NE of Swan Lake, Montana | M4.1 | 128 km | 4 km |
| Jun 29, 1995 | 2 km NNW of Kila, Montana | M4.1 | 88 km | 5 km |
| Aug 17, 1994 | 1 km E of Mullan, Idaho | M4.1 | 36 km | 2 km |
| May 2, 1995 | 2 km NW of Kila, Montana | M4.1 | 88 km | 9 km |
| Apr 1, 1992 | 10 km ESE of Swan Lake, Montana | M4.0 | 125 km | 5 km |
| Jan 20, 1998 | 15 km SSE of Happys Inn, Montana | M4.0 | 45 km | 7 km |
| Apr 24, 2015 | 8 km WSW of Hope, Idaho | M3.9 | 105 km | 17 km |
| May 2, 1995 | 3 km WNW of Kila, Montana | M3.8 | 87 km | 9 km |
| Sep 26, 2004 | 14 km WSW of Pablo, Montana | M3.8 | 78 km | 17 km |
| Aug 19, 1999 | 12 km ENE of Happys Inn, Montana | M3.7 | 64 km | 14 km |
| Apr 24, 2015 | 12 km SSW of East Hope, Idaho | M3.7 | 97 km | 9 km |
| Oct 2, 1995 | 18 km E of Finley Point, Montana | M3.7 | 115 km | 5 km |
| Oct 26, 1999 | 23 km WNW of Niarada, Montana | M3.6 | 48 km | 12 km |
| Mar 14, 1997 | 1 km E of Mullan, Idaho | M3.6 | 36 km | 2 km |
| May 30, 1996 | 3 km SSW of Mullan, Idaho | M3.6 | 40 km | 1 km |
| Feb 2, 1997 | 1 km NNE of Lindisfarne, Montana | M3.6 | 87 km | 5 km |
| Jan 20, 2000 | 21 km ENE of Athol, Idaho | M3.5 | 94 km | 5 km |
| Apr 11, 2015 | 5 km NW of Columbia Falls, Montana | M3.5 | 122 km | 13 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tornado History
6 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF2. Total: 3 injuries.
| Date | Rating | Distance | Path | Fatalities |
| May 31, 1997 | EF2 | 97 km | 5.0 mi | 0 |
| Sep 1, 2011 | EF0 | 99 km | 0.7 mi | 0 |
| Jul 18, 2007 | EF0 | 77 km | 1.0 mi | 0 |
| Jul 18, 2007 | EF0 | 98 km | 8.0 mi | 0 |
| Jun 5, 1987 | EF0 | 67 km | 0.1 mi | 0 |
| Jul 9, 1978 | EF0 | 6 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 | 45 km |
| 2021 | THORNE CREEK | 39,694 | 11 km |
| 2003 | FISH CREEK COMPLEX (THOMPSON CREEK) | 33,779 | 94 km |
| 2007 | BRUSH CREEK | 30,166 | 94 km |
| 2016 | COPPER KING | 28,338 | 19 km |
| 2017 | SUNRISE | 26,896 | 70 km |
| 2017 | SHEEP GAP | 24,702 | 26 km |
| 2022 | ELMO | 22,148 | 76 km |
| 2023 | NIARADA | 20,686 | 67 km |
| 2000 | UPPER NINEMILE COMPLEX (NINE MILE) | 19,695 | 67 km |
| 2023 | RIVER ROAD EAST | 18,068 | 48 km |
| 1994 | LITTLE WOLF | 15,714 | 88 km |
| 2017 | DEEP CREEK | 14,558 | 20 km |
| 2015 | WEST FORK FISH CREEK | 14,495 | 87 km |
| 2023 | MIDDLE RIDGE | 14,459 | 71 km |
| 2017 | MOOSE PEAK | 14,085 | 36 km |
| 2021 | DECEITFUL | 12,750 | 47 km |
| 1984 | HOUGHTON CREEK II | 12,495 | 51 km |
| 2000 | CLEAR CREEK DIVIDE COMPLEX (CLEAR CREEK) | 12,031 | 58 km |
| 1988 | DRY FORK | 11,403 | 95 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 29°F (-2°C) | 4.2 in | Wettest |
| February | 30°F (-1°C) | 2.8 in | |
| March | 35°F (2°C) | 2.3 in | |
| April | 42°F (6°C) | 1.9 in | |
| May | 50°F (10°C) | 2.1 in | |
| June | 57°F (14°C) | 2.2 in | |
| July | 70°F (21°C) | 1.1 in | Warmest, Driest |
| August | 63°F (17°C) | 1.5 in | |
| September | 54°F (12°C) | 1.7 in | |
| October | 44°F (7°C) | 2.0 in | |
| November | 33°F (1°C) | 3.7 in | |
| December | 26°F (-3°C) | 3.8 in | Coldest |
Thompson Falls has a seasonal temperature swing of 44°F / from 26°F in December to 70°F in July. Total annual precipitation is 29.3 inches, with January being the wettest month (4.2") and July the driest (1.1").