Weather & Climate in Dayton, ID
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Dayton experiences four distinct seasons with an average annual temperature of 47°F (8°C). Winters average 24°F in January while summers reach 71°F in July. Annual precipitation totals 17.3 inches (drier than the 38-inch national average). The area receives 52.4 inches of snow annually, making winter weather a significant factor for residents. Air quality is rated Good with a median AQI of 22 / among the cleanest air in the country. 85% of days have good air quality. The city sits at an elevation of 4,774 feet.
Temperature
24°F Jan (-5°C)
71°F Jul (22°C)
| Annual Average | 47.0°F |
| 13% below US avg | |
| January Average | 24°F (-5°C) |
| July Average | 71°F (22°C) |
Geography
| Elevation | 4,774 ft (1,455 m) |
| Area | 6.6 sq mi (17.0 km²) |
| Population Density | 74/sq mi |
| Coordinates | 42.1112°N, 111.9846°W |
| Timezone | America/Boise |
| County | Franklin County County |
| Nearest Airport | Brigham City Regional (BMC) 39 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 22.0 |
| Rating | Good |
| Good Days % | 84.9% |
| Unhealthy Days | 0 |
Natural Hazard Risk
| Overall Risk | Very Low |
| Risk Score | 7.6 / 100 |
| Social Vulnerability | 10.6 / 100 |
| Community Resilience | 22.9 / 100 |
Hazard Breakdown
| Tornado | Very Low |
| Earthquake | Relatively Low |
| Wildfire | Relatively Low |
| Flood | Very Low |
| Hail | Very Low |
| Strong Wind | Very Low |
| Heat Wave | Very Low |
| Winter Weather | Relatively Moderate |
| Lightning | Relatively Low |
| Ice Storm | Very Low |
| Drought | Very Low |
| Cold Wave | Very Low |
| Landslide | Very Low |
| Volcano | Very Low |
| Avalanche | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
1,254 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M5.8.
| Feb 3, 1994 | 4 km SSE of Auburn, Wyoming | M5.8 | 110 km | 8 km |
| Sep 2, 2017 | 12 km E of Soda Springs, Idaho | M5.3 | 74 km | 10 km |
| Apr 21, 2001 | 29 km WSW of Freedom, Idaho | M5.3 | 103 km | 1 km |
| Sep 10, 2017 | 9 km NNW of Georgetown, Idaho | M5.0 | 69 km | 10 km |
| Apr 15, 2010 | 9 km NE of Randolph, Utah | M4.9 | 86 km | 10 km |
| Feb 11, 1994 | 3 km SSE of Auburn, Wyoming | M4.8 | 109 km | 5 km |
| Sep 10, 2017 | 12 km ESE of Soda Springs, Idaho | M4.7 | 70 km | 5 km |
| Feb 4, 1994 | 4 km WNW of Fairview, Wyoming | M4.7 | 103 km | 5 km |
| Sep 11, 2017 | 9 km NW of Georgetown, Idaho | M4.7 | 66 km | 8 km |
| Sep 3, 2017 | 15 km ESE of Soda Springs, Idaho | M4.7 | 72 km | 10 km |
| Sep 3, 2017 | 10 km E of Soda Springs, Idaho | M4.7 | 72 km | 8 km |
| Nov 4, 1992 | 67 km ENE of Montello, Nevada | M4.7 | 139 km | 9 km |
| Sep 6, 2017 | 11 km NNW of Georgetown, Idaho | M4.6 | 68 km | 10 km |
| Feb 7, 1994 | 4 km SW of Fairview, Wyoming | M4.5 | 100 km | 5 km |
| Sep 4, 2017 | 13 km ESE of Soda Springs, Idaho | M4.5 | 72 km | 6 km |
| Feb 3, 1994 | 0 km NNE of Auburn, Wyoming | M4.4 | 111 km | 5 km |
| Feb 3, 1994 | 2 km SW of Auburn, Wyoming | M4.4 | 108 km | 5 km |
| Jan 26, 2018 | 5 km NNW of Georgetown, Idaho | M4.4 | 68 km | 10 km |
| Feb 3, 1994 | 13 km WSW of Auburn, Wyoming | M4.4 | 98 km | 5 km |
| Nov 10, 1992 | 32 km WNW of Freedom, Idaho | M4.4 | 118 km | 10 km |
Source: USGS Earthquake Catalog (M2.5+, 1990-2025). Sorted by magnitude.
Tornado History
41 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF2. Total: 5 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Aug 14, 1968 | EF2 | 96 km | 1.5 mi | 0 |
| May 29, 1996 | EF1 | 90 km | 1.3 mi | 0 |
| Jun 11, 1993 | EF1 | 68 km | 10.0 mi | 0 |
| Sep 17, 1989 | EF1 | 15 km | 0.2 mi | 0 |
| May 29, 1987 | EF1 | 18 km | 0.2 mi | 0 |
| May 21, 1986 | EF1 | 29 km | 5.0 mi | 0 |
| May 21, 1986 | EF1 | 41 km | 0.5 mi | 0 |
| Aug 18, 1983 | EF1 | 68 km | 2.5 mi | 0 |
| Jun 30, 1982 | EF1 | 10 km | 1.2 mi | 0 |
| Jul 17, 1981 | EF1 | 90 km | 0.8 mi | 0 |
| May 6, 1981 | EF1 | 27 km | 0.5 mi | 0 |
| Jun 23, 1965 | EF1 | 97 km | 0.6 mi | 0 |
| May 25, 1954 | EF1 | 64 km | 0.5 mi | 0 |
| Jun 23, 2023 | EF0 | 63 km | 0.2 mi | 0 |
| May 28, 2018 | EF0 | 62 km | 0.1 mi | 0 |
| Jul 31, 2016 | EF0 | 73 km | 1.7 mi | 0 |
| Jul 7, 2013 | EF0 | 56 km | 1.0 mi | 0 |
| May 3, 2009 | EF0 | 79 km | 1.0 mi | 0 |
| Sep 5, 2007 | EF0 | 81 km | 7.5 mi | 0 |
| Aug 17, 2007 | EF0 | 82 km | 0.2 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950-2024, US only).
Tsunami History
1 tsunami recorded within 500 km. Highest wave on record: 3.6 m (12 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1909 | UTAH | Earthquake | 3.6 m | - | 69 km |
Source: NOAA/NCEI Historical Tsunami Database.
Nearby Volcanoes
3 volcanoes within 200 km. Closest: Wapi Lava Field (133 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Wapi Lava Field | Shield | 1,604 m (5,262 ft) | -300 | 133 km |
| Hell's Half Acre | Shield | 1,631 m (5,351 ft) | -3250 | 159 km |
| Craters of the Moon | Pyroclastic cone(s) | 2,005 m (6,578 ft) | -130 | 191 km |
Source: Smithsonian Institution Global Volcanism Program (GVP).
Wildfire History
20 wildfires (100+ acres) recorded within 100 km. Largest: POWERLINE (54,378 acres, 2017).
| Year | Name | Acres Burned | Distance |
| 2017 | POWERLINE | 54,378 | 83 km |
| 2006 | STONE 2 | 50,677 | 65 km |
| 2001 | UNNAMED | 38,647 | 79 km |
| 1994 | ELEVATOR | 31,854 | 35 km |
| 2013 | STATE | 31,011 | 31 km |
| 2016 | BROAD MOUTH | 21,009 | 38 km |
| 2000 | FISHER SPRINGS | 17,428 | 91 km |
| 2000 | EAST FALL CREEK | 17,131 | 98 km |
| 1996 | GOLDEN SPIKE | 16,186 | 78 km |
| 2007 | CLEVELAND | 16,172 | 28 km |
| 2018 | GORING | 14,538 | 42 km |
| 2018 | NORTH EDEN | 14,398 | 78 km |
| 2007 | COW CANYON | 13,447 | 74 km |
| 2017 | WILDCAT | 13,100 | 94 km |
| 1992 | MEADOW DIVIDE | 12,968 | 69 km |
| 1998 | EAGLE TWO | 12,809 | 93 km |
| 2010 | ROOSTER ROCK | 12,666 | 94 km |
| 2000 | TAYLOR | 12,633 | 49 km |
| 1988 | METCALF | 11,946 | 41 km |
| 2000 | MOONSHINE | 11,489 | 79 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 24°F (-5°C) | 1.7 in | Coldest |
| February | 28°F (-2°C) | 1.4 in | |
| March | 39°F (4°C) | 1.5 in | |
| April | 46°F (8°C) | 1.9 in | |
| May | 55°F (13°C) | 2.2 in | Wettest |
| June | 63°F (17°C) | 1.2 in | |
| July | 71°F (22°C) | 0.7 in | Warmest, Driest |
| August | 70°F (21°C) | 0.8 in | |
| September | 60°F (16°C) | 1.5 in | |
| October | 48°F (9°C) | 1.6 in | |
| November | 35°F (2°C) | 1.2 in | |
| December | 25°F (-4°C) | 1.6 in |
Dayton has a seasonal temperature swing of 48°F / from 24°F in January to 71°F in July. Total annual precipitation is 17.3 inches, with May being the wettest month (2.2") and July the driest (0.7").