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Weather & Climate in Mountain Home, ID
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Mountain Home experiences four distinct seasons with an average annual temperature of 52°F (11°C). Winters average 32°F in January while summers reach 77°F in July. The area gets 261 sunny days per year, well above the U.S. average of 205 / making it one of the sunnier locations in the country. Air quality is rated Good with a median AQI of 33. The city sits at an elevation of 3,143 feet.
Temperature
32°F Jan (-0°C)
77°F Jul (25°C)
| Annual Average | 52.3°F |
| 3% below US avg | |
| January Average | 32°F (-0°C) |
| July Average | 77°F (25°C) |
| Sunny Days | 261 days/yr |
Geography
| Elevation | 3,143 ft (958 m) |
| Area | 6.4 sq mi (16.5 km²) |
| Population Density | 2,288/sq mi |
| Coordinates | 43.1318°N, 115.6967°W |
| Timezone | America/Boise |
| County | Elmore County County |
| Nearest Airport | Boise Air Trml/Gowen Field (BOI) 40 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 33.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively Low |
| Risk Score | 52.0 / 100 |
| Social Vulnerability | 12.2 / 100 |
| Community Resilience | 8.1 / 100 |
Hazard Breakdown
| Tornado | Very Low |
| Earthquake | Very Low |
| Wildfire | Relatively High |
| Flood | Very Low |
| Hail | Very Low |
| Strong Wind | Relatively Low |
| Heat Wave | Relatively Low |
| Winter Weather | Relatively Moderate |
| Lightning | Very Low |
| Ice Storm | Relatively Low |
| Drought | Very Low |
| Cold Wave | Very Low |
| Landslide | Relatively Low |
| Volcano | Very Low |
| Avalanche | Relatively High |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
1,020 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.9.
| Feb 26, 2024 | 10 km N of Smiths Ferry, Idaho | M4.9 | 144 km | 12 km |
| Apr 1, 2020 | 21 km WNW of Stanley, Idaho | M4.8 | 139 km | 10 km |
| Jun 25, 2020 | 27 km NW of Stanley, Idaho | M4.6 | 147 km | 8 km |
| Apr 1, 2020 | 23 km NW of Stanley, Idaho | M4.4 | 141 km | 7 km |
| May 14, 2020 | 31 km NW of Stanley, Idaho | M4.4 | 148 km | 13 km |
| May 21, 2020 | 26 km NW of Stanley, Idaho | M4.4 | 147 km | 6 km |
| Jun 9, 2020 | 11 km NW of Stanley, Idaho | M4.2 | 140 km | 10 km |
| Jun 14, 2020 | 10 km NW of Stanley, Idaho | M4.2 | 137 km | 8 km |
| Apr 21, 2020 | 29 km NW of Stanley, Idaho | M4.1 | 149 km | 10 km |
| Apr 11, 2020 | 20 km NW of Stanley, Idaho | M4.1 | 140 km | 10 km |
| Jul 10, 2020 | 18 km SW of Stanley, Idaho | M4.1 | 118 km | 10 km |
| Jun 3, 2025 | 17 km NNW of Stanley, Idaho | M4.0 | 147 km | 10 km |
| Jun 3, 2025 | 15 km NNW of Stanley, Idaho | M4.0 | 146 km | 14 km |
| Apr 1, 2020 | 18 km NW of Stanley, Idaho | M4.0 | 140 km | 14 km |
| Apr 3, 2020 | 20 km NW of Stanley, Idaho | M4.0 | 140 km | 10 km |
| Jun 6, 2025 | 17 km NW of Stanley, Idaho | M3.9 | 142 km | 13 km |
| Jan 1, 2021 | 15 km SSW of Stanley, Idaho | M3.9 | 120 km | 3 km |
| May 31, 2020 | 16 km SW of Stanley, Idaho | M3.9 | 121 km | 10 km |
| Jul 10, 2020 | 14 km SW of Stanley, Idaho | M3.9 | 122 km | 14 km |
| Apr 3, 2020 | 26 km NW of Stanley, Idaho | M3.9 | 144 km | 15 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tornado History
38 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF1. Total: 1 injury.
| Date | Rating | Distance | Path | Fatalities |
| Jun 10, 1990 | EF1 | 82 km | 0.2 mi | 0 |
| Apr 20, 1988 | EF1 | 77 km | 1.0 mi | 0 |
| Aug 10, 1986 | EF1 | 38 km | 2.0 mi | 0 |
| Jun 24, 1986 | EF1 | 93 km | 0.5 mi | 0 |
| May 2, 1985 | EF1 | 94 km | 0.1 mi | 0 |
| Oct 26, 1984 | EF1 | 73 km | 0.3 mi | 0 |
| Mar 21, 1984 | EF1 | 67 km | 0.1 mi | 0 |
| Jul 5, 1961 | EF1 | 57 km | 5.1 mi | 0 |
| Jun 2, 1961 | EF1 | 37 km | 0.1 mi | 0 |
| Jul 9, 1956 | EF1 | 91 km | 0.1 mi | 0 |
| Jun 3, 1956 | EF1 | 77 km | 0.1 mi | 0 |
| Jul 25, 2024 | EF0 | 38 km | 0.6 mi | 0 |
| May 27, 2023 | EF0 | 40 km | 5.0 mi | 0 |
| May 26, 2023 | EF0 | 90 km | 1.0 mi | 0 |
| May 27, 2022 | EF0 | 91 km | 3.8 mi | 0 |
| May 27, 2019 | EF0 | 23 km | 0.5 mi | 0 |
| May 26, 2013 | EF0 | 16 km | 3.9 mi | 0 |
| Apr 6, 2003 | EF0 | 86 km | 1.0 mi | 0 |
| Dec 15, 2000 | EF0 | 86 km | 1.0 mi | 0 |
| Aug 3, 2000 | EF0 | 61 km | — | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Nearby Volcanoes
3 volcanoes within 200 km. Closest: Black Butte Crater Lava Field (109 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Black Butte Crater Lava Field | Shield | 1,478 m (4,849 ft) | -8400 | 109 km |
| Jordan Craters | Volcanic field | 1,473 m (4,833 ft) | -1250 | 143 km |
| Craters of the Moon | Pyroclastic cone(s) | 2,005 m (6,578 ft) | -130 | 181 km |
Source: Smithsonian Institution Global Volcanism Program (GVP).
Wildfire History
20 wildfires (100+ acres) recorded within 100 km. Largest: LONG BUTTE (302,546 acres, 2010).
| Year | Name | Acres Burned | Distance |
| 2010 | LONG BUTTE | 302,546 | 66 km |
| 2015 | SODA | 282,888 | 97 km |
| 1992 | FOOTHILLS | 228,631 | 43 km |
| 2005 | CLOVER | 199,023 | 68 km |
| 2012 | KINYON ROAD | 171,409 | 72 km |
| 1994 | IDAHO CITY COMPLEX (RABBIT CREEK) | 150,456 | 92 km |
| 2013 | PONY COMPLEX | 148,188 | 28 km |
| 2012 | TRINITY RIDGE | 141,807 | 70 km |
| 2013 | ELK COMPLEX | 129,565 | 42 km |
| 1995 | TUANA COMPLEX | 80,638 | 81 km |
| 1990 | THORN CREEK | 70,365 | 96 km |
| 2019 | POT HOLE | 67,826 | 62 km |
| 1987 | BROWNS CRK | 66,024 | 39 km |
| 2011 | BIG HILL | 65,416 | 67 km |
| 1985 | CROWS NEST | 62,780 | 69 km |
| 2006 | SAILOR CAP | 62,699 | 69 km |
| 1986 | BLUE BUTTE | 62,445 | 61 km |
| 2012 | JACKS | 47,219 | 70 km |
| 1984 | BIG DRAW 2 | 45,805 | 34 km |
| 2011 | BLAIR | 40,086 | 45 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 32°F (-0°C) | 1.5 in | Wettest |
| February | 35°F (2°C) | 0.9 in | |
| March | 42°F (5°C) | 0.8 in | |
| April | 49°F (9°C) | 0.8 in | |
| May | 57°F (14°C) | 0.9 in | |
| June | 66°F (19°C) | 0.9 in | |
| July | 77°F (25°C) | 0.2 in | Warmest, Driest |
| August | 74°F (23°C) | 0.3 in | |
| September | 63°F (17°C) | 0.4 in | |
| October | 52°F (11°C) | 0.6 in | |
| November | 39°F (4°C) | 1.3 in | |
| December | 30°F (-1°C) | 1.2 in | Coldest |
Mountain Home has a seasonal temperature swing of 47°F / from 30°F in December to 77°F in July. Total annual precipitation is 9.7 inches, with January being the wettest month (1.5") and July the driest (0.2").