Weather & Climate in Harrisville, UT

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

Harrisville experiences four distinct seasons with an average annual temperature of 53°F (12°C). Winters average 30°F in January while summers reach 78°F in July. The area gets 308 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 21.6 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 4,307 feet.

Temperature

30°F Jan (-1°C) 78°F Jul (26°C)

Annual Average	52.9°F
	2% below US avg
January Average	30°F (-1°C)
July Average	78°F (26°C)
Sunny Days	308 days/yr

Geography

Elevation	4,307 ft (1,313 m)
Area	3.0 sq mi (7.7 km²)
Population Density	2,306/sq mi
Coordinates	41.2853°N, 111.9860°W
Timezone	America/Denver
County	Weber County County
Nearest Airport	Brigham City Regional (BMC) 19 miles away

Precipitation & Snow

Annual Rainfall 21.6"

43% below US avg

Wettest Month (May) 2.32"

Driest Month (Jul) 0.94"

Air Quality

AQI Median	41.0
Rating	Good

Natural Hazard Risk

Overall Risk	Relatively Moderate
Risk Score	87.0 / 100
Social Vulnerability	10.6 / 100
Community Resilience	86.6 / 100

Hazard Breakdown

Tornado	Relatively Low
Earthquake	Relatively Moderate
Wildfire	Relatively Moderate
Flood	Relatively Low
Hail	Very Low
Strong Wind	Relatively Moderate
Heat Wave	Relatively Moderate
Winter Weather	Relatively High
Lightning	Relatively High
Ice Storm	Relatively Low
Drought	Relatively Low
Cold Wave	Relatively Low
Landslide	Very Low
Avalanche	Relatively High

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

Earthquake History

515 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	60 km	12 km
Sep 10, 2017	9 km NNW of Georgetown, Idaho	M5.0	150 km	10 km
Apr 15, 2010	9 km NE of Randolph, Utah	M4.9	88 km	10 km
Sep 11, 2017	9 km NW of Georgetown, Idaho	M4.7	147 km	8 km
Nov 4, 1992	67 km ENE of Montello, Nevada	M4.7	126 km	9 km
Sep 6, 2017	11 km NNW of Georgetown, Idaho	M4.6	150 km	10 km
Mar 18, 2020	6 km NNE of Magna, Utah	M4.6	59 km	9 km
Mar 18, 2020	5 km NE of Magna, Utah	M4.6	60 km	11 km
Jan 26, 2018	5 km NNW of Georgetown, Idaho	M4.4	147 km	10 km
May 5, 2024	16 km SW of Thatcher, Utah	M4.4	49 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	133 km	10 km
Jan 3, 2021	10 km NNW of Georgetown, Idaho	M4.2	150 km	5 km
Apr 16, 2020	4 km NE of Magna, Utah	M4.2	61 km	10 km
Mar 16, 1992	6 km S of Herriman, Utah	M4.2	92 km	12 km
Mar 18, 2020	1 km NNW of Magna, Utah	M4.2	63 km	9 km
Apr 15, 2020	4 km NE of Magna, Utah	M4.2	62 km	9 km
Sep 11, 2017	9 km NW of Georgetown, Idaho	M4.1	147 km	10 km
Sep 9, 2017	9 km NNW of Georgetown, Idaho	M4.1	150 km	7 km
Sep 11, 2017	11 km NW of Georgetown, Idaho	M4.1	148 km	5 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	63 km	4.3 mi	1
Aug 14, 1968	EF2	9 km	1.5 mi	0
Feb 9, 1965	EF2	64 km	0.1 mi	0
Jun 3, 1963	EF2	46 km	2.0 mi	0
Sep 2, 2021	EF1	48 km	2.1 mi	0
Sep 22, 2016	EF1	14 km	2.9 mi	0
Aug 20, 1998	EF1	43 km	0.1 mi	0
May 29, 1996	EF1	2 km	1.3 mi	0
Jun 2, 1993	EF1	51 km	1.0 mi	0
May 3, 1993	EF1	79 km	0.1 mi	0
Sep 23, 1992	EF1	24 km	2.0 mi	0
Jul 25, 1991	EF1	82 km	10.0 mi	0
Sep 17, 1989	EF1	77 km	0.2 mi	0
Jul 8, 1989	EF1	77 km	0.2 mi	0
Mar 2, 1989	EF1	66 km	0.2 mi	0
Jan 10, 1989	EF1	79 km	0.2 mi	0
May 29, 1987	EF1	78 km	0.2 mi	0
May 21, 1986	EF1	97 km	5.0 mi	0
Jun 30, 1982	EF1	91 km	1.2 mi	0
May 6, 1981	EF1	65 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	—	83 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	94 km
2001	UNNAMED	38,647	52 km
1995	REDLAM	35,405	100 km
1994	ELEVATOR	31,854	85 km
1995	PUDDLE VALLEY	31,249	91 km
2013	STATE	31,011	88 km
2007	MONARCH	25,046	82 km
2016	BROAD MOUTH	21,009	70 km
2005	SALLY	19,726	78 km
1996	SILVER HILL	17,137	82 km
2007	KIMBELL	16,949	86 km
2000	CASTLEROCK	16,718	66 km
1996	GOLDEN SPIKE	16,186	56 km
2011	LAKESIDE	16,165	81 km
2016	WEST ANTELOPE	15,483	45 km
1999	BRIDGER BA	15,227	99 km
2018	GORING	14,538	70 km
2020	TABBY CANYON	14,330	65 km
1994	DRY CANYON 2	10,927	71 km
2017	SALLY	10,840	78 km

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

Monthly Weather

Month	Avg Temperature	Precipitation	Summary
January	30°F (-1°C)	1.8 in
February	29°F (-2°C)	1.8 in
March	36°F (2°C)	2.1 in
April	44°F (6°C)	2.2 in
May	52°F (11°C)	2.3 in	Wettest
June	62°F (16°C)	1.3 in
July	78°F (26°C)	0.9 in	Warmest, Driest
August	69°F (20°C)	1.1 in
September	59°F (15°C)	1.6 in
October	48°F (9°C)	1.9 in
November	35°F (2°C)	1.9 in
December	26°F (-3°C)	1.7 in	Coldest

Harrisville has a seasonal temperature swing of 52°F / from 26°F in December to 78°F in July. Total annual precipitation is 20.7 inches, with May being the wettest month (2.3") and July the driest (0.9").

View full profile of Harrisville, UT →