Weather & Climate in Marriott-Slaterville, UT

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

Marriott-Slaterville 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 4,239 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	4,239 ft (1,292 m)
Area	7.4 sq mi (19.1 km²)
Population Density	254/sq mi
Coordinates	41.2611°N, 112.0363°W
Timezone	America/Denver
County	Davis County County
Nearest Airport	Brigham City Regional (BMC) 20 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

391 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	57 km	12 km
Apr 15, 2010	9 km NE of Randolph, Utah	M4.9	93 km	10 km
Nov 4, 1992	67 km ENE of Montello, Nevada	M4.7	122 km	9 km
Mar 18, 2020	6 km NNE of Magna, Utah	M4.6	56 km	9 km
Mar 18, 2020	5 km NE of Magna, Utah	M4.6	57 km	11 km
May 5, 2024	16 km SW of Thatcher, Utah	M4.4	48 km	7 km
Jun 30, 2006	12 km WSW of Georgetown, Idaho	M4.3	137 km	10 km
Apr 16, 2020	4 km NE of Magna, Utah	M4.2	58 km	10 km
Apr 15, 2020	4 km NE of Magna, Utah	M4.2	59 km	9 km
Mar 16, 1992	6 km S of Herriman, Utah	M4.2	89 km	12 km
Mar 18, 2020	1 km NNW of Magna, Utah	M4.2	60 km	9 km
May 25, 2016	15 km NNE of Tabiona, Utah	M4.0	145 km	16 km
Mar 18, 2020	4 km NNE of Magna, Utah	M4.0	57 km	7 km
Sep 14, 2017	3 km WNW of Georgetown, Idaho	M4.0	146 km	10 km
Jun 3, 2009	5 km WNW of Riverside, Utah	M4.0	62 km	9 km
Jul 14, 2006	14 km WSW of Georgetown, Idaho	M4.0	136 km	6 km
Mar 18, 2020	4 km NNE of Magna, Utah	M3.9	57 km	9 km
May 1, 2025	4 km WNW of Independence, Utah	M3.9	122 km	14 km
Mar 23, 2020	8 km NNE of Magna, Utah	M3.9	54 km	10 km
May 4, 2024	16 km SW of Thatcher, Utah	M3.9	47 km	6 km

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

Tornado History

55 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	61 km	4.3 mi	1
Aug 14, 1968	EF2	4 km	1.5 mi	0
Feb 9, 1965	EF2	60 km	0.1 mi	0
Jun 3, 1963	EF2	44 km	2.0 mi	0
Sep 2, 2021	EF1	46 km	2.1 mi	0
Sep 22, 2016	EF1	11 km	2.9 mi	0
Aug 20, 1998	EF1	47 km	0.1 mi	0
May 29, 1996	EF1	7 km	1.3 mi	0
Jun 2, 1993	EF1	49 km	1.0 mi	0
May 3, 1993	EF1	75 km	0.1 mi	0
Sep 23, 1992	EF1	20 km	2.0 mi	0
Jul 25, 1991	EF1	78 km	10.0 mi	0
Sep 17, 1989	EF1	80 km	0.2 mi	0
Jul 8, 1989	EF1	74 km	0.2 mi	0
Mar 2, 1989	EF1	63 km	0.2 mi	0
Jan 10, 1989	EF1	77 km	0.2 mi	0
May 29, 1987	EF1	81 km	0.2 mi	0
May 21, 1986	EF1	99 km	5.0 mi	0
Jun 30, 1982	EF1	94 km	1.2 mi	0
May 6, 1981	EF1	68 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	—	82 km

Source: NOAA/NCEI Historical Tsunami Database.

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	90 km
2000	SALT LAKE DESERT COMPLEX (ARAGONITE)	39,825	100 km
2001	UNNAMED	38,647	50 km
1995	REDLAM	35,405	95 km
1994	ELEVATOR	31,854	86 km
1995	PUDDLE VALLEY	31,249	86 km
2013	STATE	31,011	89 km
2007	MONARCH	25,046	77 km
2016	BROAD MOUTH	21,009	71 km
2005	SALLY	19,726	73 km
1996	SILVER HILL	17,137	77 km
2007	KIMBELL	16,949	81 km
2000	CASTLEROCK	16,718	61 km
1996	GOLDEN SPIKE	16,186	54 km
2011	LAKESIDE	16,165	76 km
2016	WEST ANTELOPE	15,483	41 km
2018	GORING	14,538	71 km
2020	TABBY CANYON	14,330	61 km
1994	DRY CANYON 2	10,927	76 km
2017	SALLY	10,840	73 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

Marriott-Slaterville 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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