Weather & Climate in Millcreek, UT

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

Millcreek experiences four distinct seasons with an average annual temperature of 53°F (12°C). Winters average 31°F in January while summers reach 78°F in July. The area gets 282 sunny days per year, well above the U.S. average of 205 / making it one of the sunnier locations in the country. Air quality is rated Good with a median AQI of 41. The city sits at an elevation of 4,560 feet.

Temperature

31°F Jan (-0°C) 78°F Jul (26°C)

Annual Average	53.2°F
	1% below US avg
January Average	31°F (-0°C)
July Average	78°F (26°C)
Sunny Days	282 days/yr

Geography

Elevation	4,560 ft (1,390 m)
Area	13.0 sq mi (33.6 km²)
Population Density	4,910/sq mi
Coordinates	40.6890°N, 111.8296°W
Timezone	America/Denver
County	Salt Lake County County
Nearest Airport	Salt Lake City International (SLC) 10 miles away

Precipitation & Snow

Wettest Month (Mar) 2.24"

Driest Month (Jul) 1.06"

Air Quality

AQI Median	41.0
Rating	Good

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

486 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	22 km	12 km
Apr 15, 2010	9 km NE of Randolph, Utah	M4.9	130 km	10 km
Mar 18, 2020	6 km NNE of Magna, Utah	M4.6	22 km	9 km
Mar 18, 2020	5 km NE of Magna, Utah	M4.6	21 km	11 km
May 5, 2024	16 km SW of Thatcher, Utah	M4.4	111 km	7 km
Apr 17, 2003	6 km SSW of Levan, Utah	M4.2	132 km	1 km
Apr 16, 2020	4 km NE of Magna, Utah	M4.2	20 km	10 km
Mar 18, 2020	1 km NNW of Magna, Utah	M4.2	24 km	9 km
Mar 16, 1992	6 km S of Herriman, Utah	M4.2	32 km	12 km
Apr 15, 2020	4 km NE of Magna, Utah	M4.2	20 km	9 km
Jun 29, 2014	6 km SE of Spring City, Utah	M4.2	143 km	9 km
Mar 7, 2000	7 km N of Helper, Utah	M4.2	133 km	-3 km
May 25, 2016	15 km NNE of Tabiona, Utah	M4.0	102 km	16 km
Mar 18, 2020	4 km NNE of Magna, Utah	M4.0	22 km	7 km
Jun 3, 2009	5 km WNW of Riverside, Utah	M4.0	128 km	9 km
Mar 18, 2020	4 km NNE of Magna, Utah	M3.9	22 km	9 km
May 1, 2025	4 km WNW of Independence, Utah	M3.9	61 km	14 km
Mar 23, 2020	8 km NNE of Magna, Utah	M3.9	21 km	10 km
May 4, 2024	16 km SW of Thatcher, Utah	M3.9	110 km	6 km
Sep 24, 2019	5 km ENE of Howell, Utah	M3.9	134 km	7 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	6 km	4.3 mi	1
Aug 14, 1968	EF2	66 km	1.5 mi	0
Feb 9, 1965	EF2	23 km	0.1 mi	0
Jun 3, 1963	EF2	22 km	2.0 mi	0
Sep 2, 2021	EF1	21 km	2.1 mi	0
Sep 22, 2016	EF1	55 km	2.9 mi	0
Aug 20, 1998	EF1	66 km	0.1 mi	0
May 29, 1996	EF1	69 km	1.3 mi	0
Jun 2, 1993	EF1	17 km	1.0 mi	0
May 3, 1993	EF1	40 km	0.1 mi	0
Sep 23, 1992	EF1	48 km	2.0 mi	0
Jul 25, 1991	EF1	38 km	10.0 mi	0
Jul 8, 1989	EF1	12 km	0.2 mi	0
Mar 2, 1989	EF1	23 km	0.2 mi	0
Jan 10, 1989	EF1	13 km	0.2 mi	0
Dec 2, 1970	EF1	38 km	1.0 mi	0
Aug 14, 1968	EF1	10 km	0.1 mi	0
Apr 17, 1966	EF1	64 km	0.1 mi	0
Jul 9, 1965	EF1	42 km	0.4 mi	0
May 28, 2018	EF0	85 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	—	143 km

Source: NOAA/NCEI Historical Tsunami Database.

Nearby Volcanoes

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

Name	Type	Elevation	Last Eruption	Distance
Black Rock Desert	Volcanic field	1,800 m (5,906 ft)	1290	200 km

Source: Smithsonian Institution Global Volcanism Program (GVP).

Wildfire History

20 wildfires (100+ acres) recorded within 100 km. Largest: POLE CREEK (102,426 acres, 2018).

Year	Name	Acres Burned	Distance
2018	POLE CREEK	102,426	83 km
2012	DALLAS CANYON	43,386	95 km
2009	BIG POLE	41,579	70 km
2000	SALT LAKE DESERT COMPLEX (ARAGONITE)	39,825	94 km
1995	REDLAM	35,405	91 km
2017	DAVIS	35,071	86 km
1996	DAVIS KNOLL COMPLEX (DAVIS KNOLL)	34,843	87 km
1995	PUDDLE VALLEY	31,249	92 km
2018	COAL HOLLOW	30,239	96 km
2013	PATCH SPRINGS	29,562	75 km
2000	OLDROYD COMPLEX (MONA WEST)	28,774	97 km
2007	MONARCH	25,046	90 km
2012	FAUST	22,155	86 km
2017	CEDAR MOUNTAIN	21,388	94 km
2018	BALD MOUNTAIN	21,016	86 km
1998	TEKOI	19,933	92 km
1994	POSTHOLLOW	18,234	92 km
1996	SILVER HILL	17,137	83 km
2007	KIMBELL	16,949	64 km
2000	CASTLEROCK	16,718	59 km

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

Monthly Weather

Month	Avg Temperature	Precipitation	Summary
January	31°F (-0°C)	1.9 in
February	29°F (-2°C)	1.9 in
March	35°F (2°C)	2.2 in	Wettest
April	42°F (6°C)	2.2 in
May	51°F (11°C)	2.0 in
June	60°F (16°C)	1.2 in
July	78°F (26°C)	1.1 in	Warmest, Driest
August	67°F (20°C)	1.2 in
September	58°F (15°C)	1.6 in
October	47°F (9°C)	1.9 in
November	35°F (2°C)	2.1 in
December	27°F (-3°C)	2.0 in	Coldest

Millcreek has a seasonal temperature swing of 51°F / from 27°F in December to 78°F in July. Total annual precipitation is 21.3 inches, with March being the wettest month (2.2") and July the driest (1.1").

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