Weather & Climate in Riverton, UT

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

Riverton experiences four distinct seasons with an average annual temperature of 55°F (13°C). Winters average 33°F in January while summers reach 80°F in July. Annual precipitation totals 21.1 inches (drier than the 38-inch national average). The area receives 74.4 inches of snow annually, making winter weather a significant factor for residents. Air quality is rated Moderate with a median AQI of 54. 41% of days have good air quality. The city sits at an elevation of 4,547 feet.

Temperature

33°F Jan (0°C) 80°F Jul (26°C)

Annual Average	54.5°F
	1% above US avg
January Average	33°F (0°C)
July Average	80°F (26°C)

Geography

Elevation	4,547 ft (1,386 m)
Area	12.6 sq mi (32.7 km²)
Population Density	3,564/sq mi
Coordinates	40.5176°N, 111.9635°W
Timezone	America/Denver
County	Salt Lake County County
Nearest Airport	Salt Lake City International (SLC) 19 miles away

Precipitation & Snow

Annual Rainfall 21.1"

44% below US avg

Snowfall 74.4"

Wettest Month (Jan) 2.50"

Driest Month (Jul) 0.64"

Air Quality

AQI Median	54.0
Rating	Moderate
Good Days %	41.0%
Unhealthy Days	43

Natural Hazard Risk

Overall Risk	Relatively High
Risk Score	98.6 / 100
Social Vulnerability	10.6 / 100
Community Resilience	66.4 / 100

Hazard Breakdown

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

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

Earthquake History

514 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	28 km	12 km
Mar 18, 2020	6 km NNE of Magna, Utah	M4.6	28 km	9 km
Mar 18, 2020	5 km NE of Magna, Utah	M4.6	27 km	11 km
May 5, 2024	16 km SW of Thatcher, Utah	M4.4	124 km	7 km
Apr 17, 2003	6 km SSW of Levan, Utah	M4.2	113 km	1 km
Apr 16, 2020	4 km NE of Magna, Utah	M4.2	26 km	10 km
Apr 15, 2020	4 km NE of Magna, Utah	M4.2	25 km	9 km
Mar 18, 2020	1 km NNW of Magna, Utah	M4.2	26 km	9 km
Mar 16, 1992	6 km S of Herriman, Utah	M4.2	10 km	12 km
Mar 7, 2000	7 km N of Helper, Utah	M4.2	128 km	-3 km
Jun 29, 2014	6 km SE of Spring City, Utah	M4.2	128 km	9 km
May 25, 2016	15 km NNE of Tabiona, Utah	M4.0	111 km	16 km
Mar 18, 2020	4 km NNE of Magna, Utah	M4.0	27 km	7 km
Jun 3, 2009	5 km WNW of Riverside, Utah	M4.0	145 km	9 km
Mar 18, 2020	4 km NNE of Magna, Utah	M3.9	27 km	9 km
Mar 23, 2020	8 km NNE of Magna, Utah	M3.9	30 km	10 km
May 1, 2025	4 km WNW of Independence, Utah	M3.9	60 km	14 km
May 4, 2024	16 km SW of Thatcher, Utah	M3.9	124 km	6 km
Sep 24, 2019	5 km ENE of Howell, Utah	M3.9	149 km	7 km
Mar 18, 2020	6 km NE of Magna, Utah	M3.9	28 km	10 km

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

Tornado History

48 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	25 km	4.3 mi	1
Aug 14, 1968	EF2	82 km	1.5 mi	0
Feb 9, 1965	EF2	25 km	0.1 mi	0
Jun 3, 1963	EF2	41 km	2.0 mi	0
Sep 2, 2021	EF1	38 km	2.1 mi	0
Sep 22, 2016	EF1	72 km	2.9 mi	0
Aug 20, 1998	EF1	88 km	0.1 mi	0
May 29, 1996	EF1	87 km	1.3 mi	0
Jun 2, 1993	EF1	35 km	1.0 mi	0
May 3, 1993	EF1	31 km	0.1 mi	0
Sep 23, 1992	EF1	63 km	2.0 mi	0
Jul 25, 1991	EF1	25 km	10.0 mi	0
Jul 8, 1989	EF1	11 km	0.2 mi	0
Mar 2, 1989	EF1	23 km	0.2 mi	0
Jan 10, 1989	EF1	10 km	0.2 mi	0
Dec 2, 1970	EF1	35 km	1.0 mi	0
Aug 14, 1968	EF1	29 km	0.1 mi	0
Apr 17, 1966	EF1	52 km	0.1 mi	0
Jul 9, 1965	EF1	37 km	0.4 mi	0
May 28, 2018	EF0	82 km	0.3 mi	0

Source: NOAA Storm Prediction Center (EF0+, 1950-2024, US only).

Nearby Volcanoes

1 volcano within 200 km. Closest: Black Rock Desert (178 km).

Name	Type	Elevation	Last Eruption	Distance
Black Rock Desert	Volcanic field	1,800 m (5,906 ft)	1290	178 km

Source: Smithsonian Institution Global Volcanism Program (GVP).

Wildfire History

20 wildfires (100+ acres) recorded within 100 km. Largest: LEAMINGTON COMPLEX (WASH) (161,203 acres, 1996).

Year	Name	Acres Burned	Distance
1996	LEAMINGTON COMPLEX (WASH)	161,203	87 km
2018	POLE CREEK	102,426	70 km
1999	RAILROAD	64,598	92 km
2012	WOOD HOLLOW	46,763	95 km
2012	DALLAS CANYON	43,386	84 km
2009	BIG POLE	41,579	59 km
2000	SALT LAKE DESERT COMPLEX (ARAGONITE)	39,825	85 km
1994	SIMPSON BT	36,917	83 km
1995	REDLAM	35,405	83 km
2017	DAVIS	35,071	66 km
1996	DAVIS KNOLL COMPLEX (DAVIS KNOLL)	34,843	67 km
1995	PUDDLE VALLEY	31,249	87 km
2018	COAL HOLLOW	30,239	86 km
2013	PATCH SPRINGS	29,562	59 km
2000	OLDROYD COMPLEX (MONA WEST)	28,774	77 km
2007	SALT CREEK	26,924	93 km
2007	MONARCH	25,046	88 km
2007	QUINCY	24,776	92 km
2012	FAUST	22,155	65 km
2005	DITTO	22,041	92 km

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

Monthly Weather

Month	Avg Temperature	Precipitation	Summary
January	33°F (0°C)	2.5 in	Coldest, Wettest
February	37°F (3°C)	2.0 in
March	46°F (8°C)	2.0 in
April	51°F (11°C)	2.5 in
May	62°F (16°C)	2.4 in
June	72°F (22°C)	1.0 in
July	80°F (26°C)	0.6 in	Warmest, Driest
August	78°F (26°C)	1.0 in
September	68°F (20°C)	1.3 in
October	54°F (12°C)	1.8 in
November	42°F (5°C)	1.6 in
December	33°F (1°C)	2.3 in

Riverton has a seasonal temperature swing of 47°F / from 33°F in January to 80°F in July. Total annual precipitation is 21.1 inches, with January being the wettest month (2.5") and July the driest (0.6").

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