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Weather & Climate in Windham, MT
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Windham has a cool climate with an average annual temperature of 45°F (7°C). Winters average 27°F in January while summers reach 67°F in July. The area gets 273 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 17.3 inches (drier than the 38-inch 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 4,264 feet.
Temperature
27°F Jan (-3°C)
67°F Jul (19°C)
| Annual Average | 44.6°F |
| 17% below US avg | |
| January Average | 27°F (-3°C) |
| July Average | 67°F (19°C) |
| Sunny Days | 273 days/yr |
Geography
| Elevation | 4,264 ft (1,300 m) |
| Area | 0.4 sq mi (1.1 km²) |
| Population Density | 136/sq mi |
| Coordinates | 47.0781°N, 110.1387°W |
| Timezone | America/Denver |
| County | Judith Basin County County |
| Nearest Airport | Great Falls International (GTF) 64 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 26.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Very Low |
| Risk Score | 5.5 / 100 |
| Social Vulnerability | 29.6 / 100 |
| Community Resilience | 49.7 / 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 | Relatively Low |
| Ice Storm | Very Low |
| Drought | Very Low |
| Cold Wave | Relatively Low |
| Landslide | Very Low |
| Avalanche | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
53 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.1.
| Apr 8, 2000 | 8 km ENE of Townsend, Montana | M4.1 | 127 km | 5 km |
| Nov 10, 2000 | 14 km NE of Townsend, Montana | M4.0 | 121 km | 2 km |
| Feb 6, 1999 | 24 km E of Townsend, Montana | M3.9 | 114 km | 1 km |
| Jan 9, 2003 | 23 km E of Wilsall, Montana | M3.7 | 119 km | 11 km |
| May 24, 2000 | 9 km ENE of Townsend, Montana | M3.7 | 126 km | 3 km |
| Jan 2, 1990 | 6 km NNE of Toston, Montana | M3.7 | 135 km | 1 km |
| Jul 23, 2014 | 11 km NNE of Toston, Montana | M3.6 | 130 km | 10 km |
| Feb 11, 1999 | 23 km E of Townsend, Montana | M3.3 | 115 km | 3 km |
| Jun 6, 2000 | 7 km E of Townsend, Montana | M3.3 | 129 km | 2 km |
| Apr 1, 2000 | 9 km ENE of Townsend, Montana | M3.3 | 127 km | 7 km |
| Jun 16, 1999 | 16 km SSE of Craig, Montana | M3.2 | 136 km | 4 km |
| Apr 9, 2000 | 9 km ENE of Townsend, Montana | M3.2 | 126 km | 4 km |
| Apr 10, 2000 | 8 km E of Townsend, Montana | M3.2 | 128 km | 4 km |
| Jun 8, 2000 | 11 km ENE of Townsend, Montana | M3.1 | 124 km | 2 km |
| Dec 5, 1991 | 15 km WSW of Hays, Montana | M3.0 | 135 km | 10 km |
| Apr 8, 2009 | 8 km ENE of Toston, Montana | M3.0 | 134 km | 2 km |
| Jul 15, 2006 | Western Montana | M3.0 | 107 km | 10 km |
| Jul 26, 2014 | 11 km NNE of Toston, Montana | M3.0 | 131 km | 9 km |
| May 23, 2000 | 8 km ENE of Townsend, Montana | M3.0 | 127 km | 6 km |
| Jan 1, 2025 | 28 km ENE of Helena Valley Northeast, Montana | M2.9 | 116 km | 20 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tornado History
66 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF3. Total: 11 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Jul 5, 1988 | EF3 | 75 km | 3.0 mi | 0 |
| Jul 5, 1988 | EF3 | 90 km | 10.0 mi | 0 |
| Jul 5, 1988 | EF3 | 100 km | 12.0 mi | 0 |
| Jul 8, 2002 | EF2 | 63 km | 10.0 mi | 0 |
| Aug 14, 1999 | EF2 | 54 km | 5.0 mi | 0 |
| Jun 25, 1996 | EF2 | 44 km | 2.0 mi | 0 |
| Apr 24, 1994 | EF2 | 12 km | 1.5 mi | 0 |
| Apr 24, 1994 | EF2 | 12 km | 1.0 mi | 0 |
| May 28, 1981 | EF2 | 88 km | 1.5 mi | 0 |
| Jun 8, 1976 | EF2 | 31 km | 0.1 mi | 0 |
| Jun 30, 1975 | EF2 | 88 km | 0.1 mi | 0 |
| Jul 10, 1965 | EF2 | 37 km | 2.0 mi | 0 |
| Jul 20, 1964 | EF2 | 80 km | 2.0 mi | 0 |
| Jun 5, 2012 | EF1 | 81 km | 2.8 mi | 0 |
| Jun 16, 2007 | EF1 | 36 km | 5.3 mi | 0 |
| Apr 22, 2003 | EF1 | 11 km | 2.0 mi | 0 |
| Aug 23, 1998 | EF1 | 35 km | 3.5 mi | 0 |
| Jun 19, 1998 | EF1 | 70 km | 1.0 mi | 0 |
| Jun 1, 1980 | EF1 | 99 km | 0.1 mi | 0 |
| May 10, 1977 | EF1 | 13 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: TURKEY (25,658 acres, 1990).
| Year | Name | Acres Burned | Distance |
| 1990 | TURKEY | 25,658 | 13 km |
| 2021 | TAYLOR | 21,704 | 60 km |
| 2021 | SOUTH MOCCASIN | 12,727 | 48 km |
| 2009 | MEISSNER | 12,318 | 42 km |
| 1985 | SANDPOINT | 10,439 | 41 km |
| 2021 | BALSINGER | 8,317 | 58 km |
| 2017 | CHINN MA | 7,029 | 97 km |
| 2020 | LOUSE CREEK | 5,237 | 26 km |
| 1988 | TWO DOT | 5,097 | 82 km |
| 1991 | BURNETTEPK | 4,644 | 61 km |
| 2020 | YOGO | 4,429 | 34 km |
| 2008 | CHOUTEAU CO COMPLEX | 4,365 | 100 km |
| 2017 | BLACKTAIL | 4,029 | 95 km |
| 1996 | COYOTE | 3,320 | 55 km |
| 2020 | EAGLE ROCK ROAD | 3,129 | 41 km |
| 2020 | LODE ROAD | 2,736 | 61 km |
| 2001 | TWIN COULE | 2,688 | 86 km |
| 2007 | CHOUTEAU CO ASST | 2,646 | 78 km |
| 2001 | LOST FORK-MONARCH COMPLEX (LOST FORK) | 2,313 | 49 km |
| 2007 | 2007 HAZ FUEL REDUCTION | 2,159 | 77 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 27°F (-3°C) | 0.7 in | |
| February | 27°F (-3°C) | 0.5 in | Driest |
| March | 33°F (1°C) | 0.9 in | |
| April | 42°F (5°C) | 1.3 in | |
| May | 50°F (10°C) | 3.1 in | Wettest |
| June | 59°F (15°C) | 2.9 in | |
| July | 67°F (19°C) | 1.9 in | Warmest |
| August | 65°F (18°C) | 1.9 in | |
| September | 55°F (13°C) | 1.6 in | |
| October | 45°F (7°C) | 1.0 in | |
| November | 32°F (0°C) | 0.6 in | |
| December | 25°F (-4°C) | 0.7 in | Coldest |
Windham has a seasonal temperature swing of 42°F / from 25°F in December to 67°F in July. Total annual precipitation is 17.0 inches, with May being the wettest month (3.1") and February the driest (0.5").