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Weather & Climate in Mackay, ID
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Mackay has a cool climate with an average annual temperature of 42°F (6°C). Winters average 19°F in January while summers reach 67°F in July. The area gets 310 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 9.9 inches (drier than the 38-inch national average). Air quality is rated Good with a median AQI of 33. The city sits at an elevation of 5,905 feet.
Temperature
19°F Jan (-7°C)
67°F Jul (19°C)
| Annual Average | 42.3°F |
| 22% below US avg | |
| January Average | 19°F (-7°C) |
| July Average | 67°F (19°C) |
| Sunny Days | 310 days/yr |
Geography
| Elevation | 5,905 ft (1,800 m) |
| Area | 0.9 sq mi (2.2 km²) |
| Population Density | 826/sq mi |
| Coordinates | 43.9120°N, 113.6127°W |
| Timezone | America/Boise |
| County | Butte County County |
| Nearest Airport | Idaho Falls Regional (IDA) 82 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 33.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Very Low |
| Risk Score | 4.4 / 100 |
| Social Vulnerability | 45.7 / 100 |
| Community Resilience | 13.2 / 100 |
Hazard Breakdown
| Tornado | Very Low |
| Earthquake | Very Low |
| Wildfire | Very Low |
| Flood | Very Low |
| Hail | Very Low |
| Strong Wind | Very Low |
| Heat Wave | Very Low |
| Winter Weather | Relatively Low |
| Lightning | Very Low |
| Ice Storm | Very Low |
| Drought | Very Low |
| Cold Wave | Relatively Low |
| Landslide | Very Low |
| Volcano | Very Low |
| Avalanche | Relatively Moderate |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
1,674 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M6.5.
| Mar 31, 2020 | Stanley, Idaho | M6.5 | 135 km | 12 km |
| Aug 20, 1999 | 22 km NW of Lima, Montana | M5.1 | 117 km | 16 km |
| Jan 3, 2015 | 9 km E of Challis, Idaho | M5.0 | 77 km | 9 km |
| Apr 13, 2014 | 15 km NNW of Challis, Idaho | M4.8 | 97 km | 4 km |
| Jun 7, 1994 | 18 km E of Challis, Idaho | M4.8 | 72 km | 5 km |
| Apr 1, 2020 | 21 km WNW of Stanley, Idaho | M4.8 | 132 km | 10 km |
| Jun 25, 2020 | 27 km NW of Stanley, Idaho | M4.6 | 136 km | 8 km |
| Apr 9, 2019 | 9 km NE of Lima, Montana | M4.6 | 124 km | 14 km |
| May 4, 1992 | 20 km E of Challis, Idaho | M4.6 | 73 km | 10 km |
| Apr 5, 2011 | 28 km NNE of Spencer, Idaho | M4.4 | 144 km | 12 km |
| Apr 14, 2014 | 13 km NW of Challis, Idaho | M4.4 | 96 km | 7 km |
| May 6, 1992 | 17 km E of Challis, Idaho | M4.4 | 71 km | 5 km |
| Dec 28, 1991 | southern Idaho | M4.4 | 82 km | 5 km |
| May 14, 2020 | 31 km NW of Stanley, Idaho | M4.4 | 139 km | 13 km |
| May 21, 2020 | 26 km NW of Stanley, Idaho | M4.4 | 134 km | 6 km |
| Apr 1, 2020 | 23 km NW of Stanley, Idaho | M4.4 | 133 km | 7 km |
| Jun 8, 2025 | 24 km E of Clayton, Idaho | M4.3 | 55 km | 7 km |
| Jan 28, 1995 | 33 km NNE of Stanley, Idaho | M4.3 | 114 km | 5 km |
| Mar 22, 1992 | 11 km NE of Challis, Idaho | M4.3 | 86 km | 5 km |
| Feb 17, 1992 | 33 km NNE of Stanley, Idaho | M4.3 | 113 km | 5 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tornado History
34 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF1.
| Date | Rating | Distance | Path | Fatalities |
| May 31, 2018 | EF1 | 84 km | 12.0 mi | 0 |
| May 31, 1997 | EF1 | 90 km | 4.0 mi | 0 |
| May 21, 1992 | EF1 | 30 km | 0.2 mi | 0 |
| Jul 21, 1987 | EF1 | 99 km | 0.2 mi | 0 |
| Jul 18, 1987 | EF1 | 50 km | 1.0 mi | 0 |
| Jul 27, 1972 | EF1 | 85 km | 1.0 mi | 0 |
| Jun 21, 2018 | EF0 | 11 km | 5.1 mi | 0 |
| May 31, 2018 | EF0 | 91 km | 3.0 mi | 0 |
| Jul 11, 2015 | EF0 | 98 km | 7.4 mi | 0 |
| Aug 20, 2014 | EF0 | 2 km | 0.1 mi | 0 |
| May 10, 2014 | EF0 | 80 km | 0.0 mi | 0 |
| May 7, 2013 | EF0 | 90 km | 1.2 mi | 0 |
| Apr 24, 2008 | EF0 | 85 km | 0.1 mi | 0 |
| Oct 4, 2006 | EF0 | 83 km | 3.0 mi | 0 |
| Oct 4, 2006 | EF0 | 84 km | 1.0 mi | 0 |
| Oct 4, 2006 | EF0 | 90 km | 0.5 mi | 0 |
| Apr 4, 2006 | EF0 | 81 km | 0.4 mi | 0 |
| Jun 4, 2005 | EF0 | 92 km | 0.2 mi | 0 |
| May 9, 2005 | EF0 | 90 km | 0.5 mi | 0 |
| May 5, 2005 | EF0 | 73 km | 0.4 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Nearby Volcanoes
4 volcanoes within 200 km. Closest: Craters of the Moon (56 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Craters of the Moon | Pyroclastic cone(s) | 2,005 m (6,578 ft) | -130 | 56 km |
| Black Butte Crater Lava Field | Shield | 1,478 m (4,849 ft) | -8400 | 101 km |
| Hell's Half Acre | Shield | 1,631 m (5,351 ft) | -3250 | 104 km |
| Wapi Lava Field | Shield | 1,604 m (5,262 ft) | -300 | 119 km |
Source: Smithsonian Institution Global Volcanism Program (GVP).
Wildfire History
20 wildfires (100+ acres) recorded within 100 km. Largest: COXS WELL (219,424 acres, 1996).
| Year | Name | Acres Burned | Distance |
| 1996 | COXS WELL | 219,424 | 91 km |
| 2006 | CRYSTAL | 218,581 | 97 km |
| 1996 | RICHFIELDS | 178,385 | 100 km |
| 1992 | BLACK RIDGE | 147,833 | 93 km |
| 2013 | BEAVER CREEK | 111,286 | 80 km |
| 2010 | JEFFERSON | 108,542 | 88 km |
| 2019 | SHEEP | 107,233 | 78 km |
| 2000 | COFFEE POINT | 73,480 | 99 km |
| 2018 | SHARPS | 63,895 | 55 km |
| 2017 | MAMMOTH CAVE | 50,391 | 96 km |
| 1999 | CEDAR BUTTE | 49,625 | 90 km |
| 2007 | CASTLE ROCK | 48,430 | 74 km |
| 2011 | T17 | 45,631 | 75 km |
| 1999 | INEEL FIRE | 43,547 | 84 km |
| 2005 | VALLEY ROAD | 40,801 | 91 km |
| 2016 | LAIDLAW | 40,551 | 82 km |
| 2003 | DEEP | 38,701 | 98 km |
| 2000 | COFFEE POINT NORTH | 35,980 | 59 km |
| 2014 | PREACHER | 33,144 | 89 km |
| 2023 | HAYDEN | 32,292 | 89 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 19°F (-7°C) | 1.1 in | Coldest |
| February | 22°F (-6°C) | 0.9 in | |
| March | 28°F (-2°C) | 0.9 in | |
| April | 36°F (2°C) | 0.8 in | |
| May | 45°F (7°C) | 1.5 in | Wettest |
| June | 53°F (12°C) | 1.5 in | |
| July | 67°F (19°C) | 1.1 in | Warmest |
| August | 60°F (16°C) | 1.0 in | |
| September | 52°F (11°C) | 0.9 in | |
| October | 42°F (6°C) | 0.7 in | Driest |
| November | 29°F (-2°C) | 0.9 in | |
| December | 19°F (-7°C) | 1.1 in |
Mackay has a seasonal temperature swing of 48°F / from 19°F in January to 67°F in July. Total annual precipitation is 12.5 inches, with May being the wettest month (1.5") and October the driest (0.7").