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Weather & Climate in Mendon, UT

Temperature, precipitation, air quality, natural hazards, and monthly weather data.

Mendon experiences four distinct seasons with an average annual temperature of 46°F (8°C). Winters average 22°F in January while summers reach 71°F in July. The area gets 316 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 17.8 inches (drier than the 38-inch national average). The area receives 51.6 inches of snow annually, making winter weather a significant factor for residents. Air quality is rated Good with a median AQI of 41. The city sits at an elevation of 4,473 feet.

Temperature

22°F Jan (-6°C) 71°F Jul (22°C)
Annual Average46.1°F
15% below US avg
January Average22°F (-6°C)
July Average71°F (22°C)
Sunny Days316 days/yr

Geography

Elevation4,473 ft (1,363 m)
Area1.3 sq mi (3.2 km²)
Population Density915/sq mi
Coordinates41.7115°N, 111.9775°W
TimezoneAmerica/Denver
CountyCache County County
Nearest AirportBrigham City Regional (BMC)
12 miles away

Precipitation & Snow

Annual Rainfall 17.8"
53% below US avg
Snowfall 51.6"
Wettest Month (May) 2.20"
Driest Month (Jul) 0.91"

Air Quality

AQI Median41.0
RatingGood

Natural Hazard Risk

Overall RiskRelatively Low
Risk Score66.5 / 100
Social Vulnerability10.6 / 100
Community Resilience76.5 / 100

Hazard Breakdown

Tornado Very Low
Earthquake Relatively Moderate
Wildfire Relatively Low
Flood Relatively Low
Hail Very Low
Strong Wind Relatively Low
Heat Wave Relatively Low
Winter Weather Relatively High
Lightning Relatively High
Ice Storm Very Low
Drought Relatively Low
Cold Wave Relatively Low
Landslide Relatively Low
Avalanche Relatively High
Source: FEMA National Risk Index v1.20 (Dec 2025)

Earthquake History

1,303 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M5.8.

Feb 3, 1994 4 km SSE of Auburn, Wyoming M5.8 143 km 8 km
Mar 18, 2020 5 km NNE of Magna, Utah M5.7 107 km 12 km
Apr 21, 2001 29 km WSW of Freedom, Idaho M5.3 143 km 1 km
Sep 2, 2017 12 km E of Soda Springs, Idaho M5.3 113 km 10 km
Sep 10, 2017 9 km NNW of Georgetown, Idaho M5.0 105 km 10 km
Apr 15, 2010 9 km NE of Randolph, Utah M4.9 73 km 10 km
Feb 11, 1994 3 km SSE of Auburn, Wyoming M4.8 142 km 5 km
Sep 10, 2017 12 km ESE of Soda Springs, Idaho M4.7 108 km 5 km
Feb 4, 1994 4 km WNW of Fairview, Wyoming M4.7 136 km 5 km
Sep 3, 2017 15 km ESE of Soda Springs, Idaho M4.7 110 km 10 km
Sep 3, 2017 10 km E of Soda Springs, Idaho M4.7 111 km 8 km
Sep 11, 2017 9 km NW of Georgetown, Idaho M4.7 103 km 8 km
Nov 4, 1992 67 km ENE of Montello, Nevada M4.7 125 km 9 km
Sep 6, 2017 11 km NNW of Georgetown, Idaho M4.6 105 km 10 km
Mar 18, 2020 6 km NNE of Magna, Utah M4.6 106 km 9 km
Mar 18, 2020 5 km NE of Magna, Utah M4.6 107 km 11 km
Feb 7, 1994 4 km SW of Fairview, Wyoming M4.5 132 km 5 km
Sep 4, 2017 13 km ESE of Soda Springs, Idaho M4.5 110 km 6 km
Jan 26, 2018 5 km NNW of Georgetown, Idaho M4.4 103 km 10 km
Feb 3, 1994 2 km SW of Auburn, Wyoming M4.4 142 km 5 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: 16 injuries.

Date Rating Distance Path Fatalities
Aug 14, 1968 EF2 52 km 1.5 mi 0
Jun 3, 1963 EF2 93 km 2.0 mi 0
Sep 2, 2021 EF1 95 km 2.1 mi 0
Sep 22, 2016 EF1 61 km 2.9 mi 0
Aug 20, 1998 EF1 69 km 0.1 mi 0
May 29, 1996 EF1 46 km 1.3 mi 0
Jun 2, 1993 EF1 98 km 1.0 mi 0
Sep 23, 1992 EF1 71 km 2.0 mi 0
Sep 17, 1989 EF1 30 km 0.2 mi 0
May 29, 1987 EF1 32 km 0.2 mi 0
May 21, 1986 EF1 82 km 0.5 mi 0
May 21, 1986 EF1 54 km 5.0 mi 0
Jun 30, 1982 EF1 44 km 1.2 mi 0
May 6, 1981 EF1 18 km 0.5 mi 0
Jun 23, 1965 EF1 73 km 0.6 mi 0
May 25, 1954 EF1 56 km 0.5 mi 0
May 28, 2018 EF0 67 km 0.1 mi 0
Jul 7, 2013 EF0 79 km 1.0 mi 0
May 3, 2009 EF0 35 km 1.0 mi 0
Jul 25, 2007 EF0 23 km 0.3 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 — 61 km
Source: NOAA/NCEI Historical Tsunami Database.

Nearby Volcanoes

1 volcano within 200 km. Closest: Wapi Lava Field (165 km).

Name Type Elevation Last Eruption Distance
Wapi Lava Field Shield 1,604 m (5,262 ft) -300 165 km
Source: Smithsonian Institution Global Volcanism Program (GVP).

Wildfire History

20 wildfires (100+ acres) recorded within 100 km. Largest: STONE 2 (50,677 acres, 2006).

Year Name Acres Burned Distance
2006 STONE 2 50,677 81 km
2001 UNNAMED 38,647 50 km
1994 ELEVATOR 31,854 45 km
2013 STATE 31,011 47 km
2016 BROAD MOUTH 21,009 32 km
1996 GOLDEN SPIKE 16,186 51 km
2007 CLEVELAND 16,172 68 km
2016 WEST ANTELOPE 15,483 90 km
1999 BRIDGER BA 15,227 88 km
2018 GORING 14,538 35 km
2018 NORTH EDEN 14,398 81 km
2007 COW CANYON 13,447 88 km
2017 WILDCAT 13,100 90 km
1992 MEADOW DIVIDE 12,968 88 km
2000 TAYLOR 12,633 64 km
1988 METCALF 11,946 71 km
1994 DRY CANYON 2 10,927 58 km
2007 MITCHELL 10,466 95 km
1984 RAVEN 9,848 94 km
2019 SHELTER PASS 9,675 99 km
Source: NIFC/IRWIN Wildfire Records (100+ acres).

Monthly Weather

Month Avg Temperature Precipitation Summary
January 22°F (-6°C) 1.5 in Coldest
February 27°F (-3°C) 1.5 in
March 38°F (3°C) 1.8 in
April 47°F (8°C) 1.9 in
May 55°F (13°C) 2.2 in Wettest
June 64°F (18°C) 1.3 in
July 71°F (22°C) 0.9 in Warmest, Driest
August 70°F (21°C) 0.9 in
September 60°F (16°C) 1.5 in
October 48°F (9°C) 1.8 in
November 35°F (2°C) 1.5 in
December 25°F (-4°C) 1.5 in

Mendon has a seasonal temperature swing of 49°F / from 22°F in January to 71°F in July. Total annual precipitation is 18.0 inches, with May being the wettest month (2.2") and July the driest (0.9").

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