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Weather & Climate in St. Regis, MT
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
St. Regis experiences four distinct seasons with an average annual temperature of 46°F (8°C). Winters average 28°F in January while summers reach 67°F in July. The area gets 253 sunny days per year, above the national average. 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 2,644 feet.
Temperature
28°F Jan (-2°C)
67°F Jul (19°C)
| Annual Average | 46.2°F |
| 14% below US avg | |
| January Average | 28°F (-2°C) |
| July Average | 67°F (19°C) |
| Sunny Days | 253 days/yr |
Geography
| Elevation | 2,644 ft (806 m) |
| Area | 0.9 sq mi (2.3 km²) |
| Population Density | 400/sq mi |
| Coordinates | 47.3049°N, 115.1039°W |
| Timezone | America/Denver |
| County | Mineral County County |
| Nearest Airport | Missoula Montana (MSO) 55 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
202 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.7.
| Dec 22, 1998 | Idaho-Montana border region | M4.7 | 77 km | 12 km |
| Apr 15, 1998 | 11 km NE of Swan Lake, Montana | M4.1 | 128 km | 4 km |
| Aug 17, 1994 | 1 km E of Mullan, Idaho | M4.1 | 54 km | 2 km |
| Jun 29, 1995 | 2 km NNW of Kila, Montana | M4.1 | 104 km | 5 km |
| May 2, 1995 | 2 km NW of Kila, Montana | M4.1 | 104 km | 9 km |
| Jun 28, 2000 | 21 km SE of Clinton, Montana | M4.0 | 141 km | 10 km |
| Apr 1, 1992 | 10 km ESE of Swan Lake, Montana | M4.0 | 122 km | 5 km |
| Jan 20, 1998 | 15 km SSE of Happys Inn, Montana | M4.0 | 72 km | 7 km |
| Apr 24, 2015 | 8 km WSW of Hope, Idaho | M3.9 | 141 km | 17 km |
| May 7, 1992 | 14 km NE of Seeley Lake, Montana | M3.8 | 134 km | 5 km |
| Nov 8, 1997 | 39 km SE of Pierce, Idaho | M3.8 | 120 km | 5 km |
| Mar 21, 1992 | 20 km NE of Seeley Lake, Montana | M3.8 | 138 km | 5 km |
| Jul 5, 2024 | 24 km ENE of Seeley Lake, Montana | M3.8 | 143 km | 22 km |
| Jun 1, 1996 | 23 km N of Ovando, Montana | M3.8 | 146 km | 10 km |
| May 2, 1995 | 3 km WNW of Kila, Montana | M3.8 | 103 km | 9 km |
| Sep 26, 2004 | 14 km WSW of Pablo, Montana | M3.8 | 67 km | 17 km |
| Jan 13, 2010 | 36 km NE of Seeley Lake, Montana | M3.7 | 146 km | 21 km |
| Oct 2, 1995 | 18 km E of Finley Point, Montana | M3.7 | 107 km | 5 km |
| Apr 24, 2015 | 12 km SSW of East Hope, Idaho | M3.7 | 132 km | 9 km |
| Aug 19, 1999 | 12 km ENE of Happys Inn, Montana | M3.7 | 91 km | 14 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tornado History
7 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF0. Total: 3 injuries.
| Date | Rating | Distance | Path | Fatalities |
| May 9, 2023 | EF0 | 79 km | 0.5 mi | 0 |
| Sep 1, 2011 | EF0 | 95 km | 0.7 mi | 0 |
| Jul 18, 2007 | EF0 | 71 km | 1.0 mi | 0 |
| Mar 3, 1991 | EF0 | 84 km | 0.1 mi | 0 |
| Jun 5, 1987 | EF0 | 88 km | 0.1 mi | 0 |
| Jul 20, 1983 | EF0 | 88 km | 2.0 mi | 0 |
| Jul 9, 1978 | EF0 | 41 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 | 59 km |
| 2017 | LOLO PEAK | 62,316 | 97 km |
| 2021 | THORNE CREEK | 39,694 | 43 km |
| 2003 | FISH CREEK COMPLEX (THOMPSON CREEK) | 33,779 | 57 km |
| 2012 | FREEZE OUT | 28,355 | 100 km |
| 2016 | COPPER KING | 28,338 | 36 km |
| 2017 | SUNRISE | 26,896 | 33 km |
| 2017 | SHEEP GAP | 24,702 | 19 km |
| 2022 | ELMO | 22,148 | 81 km |
| 2023 | NIARADA | 20,686 | 72 km |
| 2000 | UPPER NINEMILE COMPLEX (NINE MILE) | 19,695 | 37 km |
| 2023 | RIVER ROAD EAST | 18,068 | 27 km |
| 2017 | DEEP CREEK | 14,558 | 56 km |
| 2015 | WEST FORK FISH CREEK | 14,495 | 50 km |
| 2023 | MIDDLE RIDGE | 14,459 | 61 km |
| 2017 | MOOSE PEAK | 14,085 | 69 km |
| 2021 | DECEITFUL | 12,750 | 74 km |
| 1984 | HOUGHTON CREEK II | 12,495 | 84 km |
| 2003 | BEAVER LAKE COMPLEX (BEAVER LAKES) | 12,432 | 98 km |
| 2000 | CLEAR CREEK DIVIDE COMPLEX (CLEAR CREEK) | 12,031 | 36 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 28°F (-2°C) | 2.7 in | Wettest |
| February | 27°F (-3°C) | 1.8 in | |
| March | 34°F (1°C) | 1.5 in | |
| April | 40°F (5°C) | 1.4 in | |
| May | 48°F (9°C) | 2.0 in | |
| June | 56°F (13°C) | 2.0 in | |
| July | 67°F (19°C) | 1.1 in | Warmest, Driest |
| August | 62°F (17°C) | 1.3 in | |
| September | 54°F (12°C) | 1.5 in | |
| October | 43°F (6°C) | 1.4 in | |
| November | 33°F (0°C) | 2.2 in | |
| December | 25°F (-4°C) | 2.5 in | Coldest |
St. Regis has a seasonal temperature swing of 42°F / from 25°F in December to 67°F in July. Total annual precipitation is 21.4 inches, with January being the wettest month (2.7") and July the driest (1.1").