Weather & Climate in Plain City, UT

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

Plain City experiences four distinct seasons with an average annual temperature of 53°F (12°C). Winters average 29°F in January while summers reach 78°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 18.8 inches (drier than the 38-inch national average). Air quality is rated Good with a median AQI of 41. The city sits at an elevation of 4,217 feet.

Temperature

29°F Jan (-2°C) 78°F Jul (26°C)

Annual Average	52.7°F
	2% below US avg
January Average	29°F (-2°C)
July Average	78°F (26°C)
Sunny Days	316 days/yr

Geography

Elevation	4,217 ft (1,285 m)
Area	12.0 sq mi (31.0 km²)
Population Density	669/sq mi
Coordinates	41.3067°N, 112.0943°W
Timezone	America/Denver
County	Davis County County
Nearest Airport	Brigham City Regional (BMC) 17 miles away

Precipitation & Snow

Annual Rainfall 18.8"

51% below US avg

Wettest Month (May) 2.36"

Driest Month (Jul) 0.75"

Air Quality

AQI Median	41.0
Rating	Good

Natural Hazard Risk

Overall Risk	Relatively Moderate
Risk Score	87.8 / 100
Social Vulnerability	10.6 / 100
Community Resilience	97.9 / 100

Hazard Breakdown

Tornado	Relatively Low
Earthquake	Relatively Moderate
Wildfire	Relatively Moderate
Flood	Relatively Low
Hail	Very Low
Strong Wind	Relatively High
Heat Wave	Relatively Moderate
Winter Weather	Relatively High
Lightning	Very High
Ice Storm	Relatively Low
Drought	Relatively Low
Cold Wave	Relatively Low
Landslide	Relatively Moderate
Coastal Flood	No Rating
Volcano	Very Low
Avalanche	Relatively High

Source: FEMA National Risk Index v1.20 (Dec 2025)

Earthquake History

451 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M5.7.

Mar 18, 2020	5 km NNE of Magna, Utah	M5.7	62 km	12 km
Apr 15, 2010	9 km NE of Randolph, Utah	M4.9	95 km	10 km
Sep 11, 2017	9 km NW of Georgetown, Idaho	M4.7	148 km	8 km
Nov 4, 1992	67 km ENE of Montello, Nevada	M4.7	116 km	9 km
Mar 18, 2020	6 km NNE of Magna, Utah	M4.6	61 km	9 km
Mar 18, 2020	5 km NE of Magna, Utah	M4.6	62 km	11 km
Jan 26, 2018	5 km NNW of Georgetown, Idaho	M4.4	148 km	10 km
May 5, 2024	16 km SW of Thatcher, Utah	M4.4	41 km	7 km
Sep 11, 2017	9 km NNW of Georgetown, Idaho	M4.3	149 km	2 km
Jun 30, 2006	12 km WSW of Georgetown, Idaho	M4.3	134 km	10 km
Apr 16, 2020	4 km NE of Magna, Utah	M4.2	64 km	10 km
Mar 16, 1992	6 km S of Herriman, Utah	M4.2	95 km	12 km
Mar 18, 2020	1 km NNW of Magna, Utah	M4.2	65 km	9 km
Apr 15, 2020	4 km NE of Magna, Utah	M4.2	64 km	9 km
Sep 11, 2017	9 km NW of Georgetown, Idaho	M4.1	148 km	10 km
Oct 11, 2017	8 km NNW of Georgetown, Idaho	M4.1	149 km	10 km
Sep 11, 2017	11 km NW of Georgetown, Idaho	M4.1	149 km	5 km
Sep 11, 2017	10 km NW of Georgetown, Idaho	M4.1	149 km	5 km
Mar 18, 2020	4 km NNE of Magna, Utah	M4.0	62 km	7 km
Jun 3, 2009	5 km WNW of Riverside, Utah	M4.0	56 km	9 km

Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.

Tornado History

54 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF2. Total: 1 fatality, 96 injuries.

Date	Rating	Distance	Path	Fatalities
Aug 11, 1999	EF2	67 km	4.3 mi	1
Aug 14, 1968	EF2	6 km	1.5 mi	0
Feb 9, 1965	EF2	65 km	0.1 mi	0
Jun 3, 1963	EF2	51 km	2.0 mi	0
Sep 2, 2021	EF1	52 km	2.1 mi	0
Sep 22, 2016	EF1	17 km	2.9 mi	0
Aug 20, 1998	EF1	52 km	0.1 mi	0
May 29, 1996	EF1	10 km	1.3 mi	0
Jun 2, 1993	EF1	55 km	1.0 mi	0
May 3, 1993	EF1	78 km	0.1 mi	0
Sep 23, 1992	EF1	25 km	2.0 mi	0
Jul 25, 1991	EF1	82 km	10.0 mi	0
Sep 17, 1989	EF1	76 km	0.2 mi	0
Jul 8, 1989	EF1	80 km	0.2 mi	0
Mar 2, 1989	EF1	68 km	0.2 mi	0
Jan 10, 1989	EF1	83 km	0.2 mi	0
May 29, 1987	EF1	78 km	0.2 mi	0
May 21, 1986	EF1	93 km	5.0 mi	0
Jun 30, 1982	EF1	90 km	1.2 mi	0
May 6, 1981	EF1	63 km	0.5 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	—	75 km

Source: NOAA/NCEI Historical Tsunami Database.

Nearby Volcanoes

1 volcano within 200 km. Closest: Wapi Lava Field (198 km).

Name	Type	Elevation	Last Eruption	Distance
Wapi Lava Field	Shield	1,604 m (5,262 ft)	-300	198 km

Source: Smithsonian Institution Global Volcanism Program (GVP).

Wildfire History

20 wildfires (100+ acres) recorded within 100 km. Largest: BIG POLE (41,579 acres, 2009).

Year	Name	Acres Burned	Distance
2009	BIG POLE	41,579	91 km
2000	SALT LAKE DESERT COMPLEX (ARAGONITE)	39,825	100 km
2001	UNNAMED	38,647	43 km
1995	REDLAM	35,405	95 km
1994	ELEVATOR	31,854	80 km
1995	PUDDLE VALLEY	31,249	85 km
2013	STATE	31,011	83 km
2006	HOGUPS	30,094	100 km
2007	MONARCH	25,046	75 km
2016	BROAD MOUTH	21,009	65 km
2005	SALLY	19,726	70 km
1996	SILVER HILL	17,137	76 km
2007	KIMBELL	16,949	83 km
2000	CASTLEROCK	16,718	62 km
1996	GOLDEN SPIKE	16,186	47 km
2011	LAKESIDE	16,165	75 km
2016	WEST ANTELOPE	15,483	44 km
2006	SCORPIO	14,887	96 km
2000	HOGUP	14,688	94 km
2018	GORING	14,538	65 km

Source: NIFC/IRWIN Wildfire Records (100+ acres).

Monthly Weather

Month	Avg Temperature	Precipitation	Summary
January	29°F (-2°C)	1.7 in	Coldest
February	32°F (0°C)	1.6 in
March	42°F (5°C)	1.9 in
April	49°F (10°C)	2.0 in
May	58°F (15°C)	2.4 in	Wettest
June	68°F (20°C)	1.1 in
July	78°F (26°C)	0.8 in	Warmest, Driest
August	74°F (23°C)	0.9 in
September	64°F (18°C)	1.5 in
October	51°F (11°C)	1.9 in
November	39°F (4°C)	1.7 in
December	29°F (-2°C)	1.5 in

Plain City has a seasonal temperature swing of 49°F / from 29°F in January to 78°F in July. Total annual precipitation is 18.8 inches, with May being the wettest month (2.4") and July the driest (0.8").

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