Weather & Climate in Reliance, WY

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

Reliance has a cool climate with an average annual temperature of 45°F (7°C). Winters average 24°F in January while summers reach 69°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 10.5 inches (drier than the 38-inch national average). The area receives 31.3 inches of snow annually, a moderate snowfall amount. Air quality is rated Good with a median AQI of 34. The city sits at an elevation of 6,513 feet.

Temperature

24°F Jan (-5°C) 69°F Jul (21°C)

Annual Average	45.0°F
	17% below US avg
January Average	24°F (-5°C)
July Average	69°F (21°C)
Sunny Days	316 days/yr

Geography

Elevation	6,513 ft (1,985 m)
Area	4.1 sq mi (10.7 km²)
Population Density	97/sq mi
Coordinates	41.6682°N, 109.1977°W
Timezone	America/Denver
County	Sweetwater County County
Nearest Airport	Southwest Wyoming Regional (RKS) 9 miles away

Precipitation & Snow

Annual Rainfall 10.5"

73% below US avg

Snowfall 31.3"

Wettest Month (May) 1.10"

Driest Month (Feb) 0.39"

Air Quality

AQI Median	34.0
Rating	Good

Natural Hazard Risk

Overall Risk	Very Low
Risk Score	30.6 / 100
Social Vulnerability	19.3 / 100
Community Resilience	16.4 / 100

Hazard Breakdown

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

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

Earthquake History

91 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.8.

Sep 21, 2013	20 km W of Fort Washakie, Wyoming	M4.8	145 km	76 km
Apr 6, 1999	31 km SE of Wamsutter, Wyoming	M4.3	124 km	10 km
Jan 30, 2000	8 km ESE of Little America, Wyoming	M4.3	51 km	5 km
May 26, 2000	5 km S of Bairoil, Wyoming	M4.0	147 km	5 km
Oct 21, 1996	42 km ESE of Boulder, Wyoming	M3.7	98 km	5 km
May 17, 2009	24 km WNW of Jeffrey City, Wyoming	M3.7	132 km	5 km
Jun 30, 1998	8 km NNW of Point of Rocks, Wyoming	M3.6	32 km	6 km
Jun 25, 1994	12 km NE of Little America, Wyoming	M3.6	46 km	-3 km
Jul 2, 2016	7 km NNE of Granger, Wyoming	M3.5	62 km	-3 km
Mar 7, 2009	9 km NNE of Granger, Wyoming	M3.5	60 km	1 km
Feb 9, 2015	11 km NNE of Granger, Wyoming	M3.5	58 km	-2 km
Apr 23, 2025	2 km NNW of Little America, Wyoming	M3.5	57 km	-2 km
Aug 10, 2025	3 km NNW of Little America, Wyoming	M3.5	58 km	-2 km
Oct 15, 2013	14 km NNE of Granger, Wyoming	M3.4	59 km	-3 km
Jul 1, 2016	20 km NE of Granger, Wyoming	M3.4	53 km	3 km
Jun 5, 2007	15 km NNW of Granger, Wyoming	M3.4	70 km	-3 km
Feb 9, 2008	9 km NE of Granger, Wyoming	M3.3	58 km	5 km
Feb 20, 2025	2 km N of Little America, Wyoming	M3.3	57 km	-3 km
Jan 29, 2012	27 km ENE of Atlantic City, Wyoming	M3.2	120 km	5 km
Mar 5, 2025	3 km NW of Little America, Wyoming	M3.2	59 km	-3 km

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

Tornado History

26 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF1.

Date	Rating	Distance	Path	Fatalities
Jul 10, 2001	EF1	77 km	5.0 mi	0
Apr 20, 2001	EF1	35 km	0.2 mi	0
Apr 14, 2000	EF1	35 km	0.5 mi	0
Jul 31, 1978	EF1	8 km	1.0 mi	0
Jun 27, 1974	EF1	28 km	0.1 mi	0
Sep 9, 1973	EF1	29 km	0.1 mi	0
May 28, 2018	EF0	83 km	0.5 mi	0
May 28, 2018	EF0	62 km	3.5 mi	0
May 26, 2017	EF0	64 km	11.4 mi	0
Jul 7, 2015	EF0	87 km	0.1 mi	0
Jun 16, 2015	EF0	100 km	1.0 mi	0
May 7, 2014	EF0	31 km	0.5 mi	0
Sep 15, 2013	EF0	46 km	0.1 mi	0
Aug 21, 2001	EF0	94 km	2.0 mi	0
May 5, 1999	EF0	89 km	1.0 mi	0
Jun 10, 1997	EF0	32 km	0.1 mi	0
May 25, 1995	EF0	83 km	0.5 mi	0
May 15, 1992	EF0	51 km	0.1 mi	0
Sep 9, 1991	EF0	72 km	0.4 mi	0
Aug 4, 1990	EF0	68 km	0.1 mi	0

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

Wildfire History

20 wildfires (100+ acres) recorded within 100 km. Largest: WLD HORSE (41,881 acres, 2000).

Year	Name	Acres Burned	Distance
2000	WLD HORSE	41,881	47 km
2000	SHEEP MT	31,393	46 km
2002	MUSTANG	20,607	83 km
2018	LANEY RIM	11,589	55 km
2020	RICHARD MTN	7,802	75 km
1997	RED CREEK	5,381	73 km
2006	SALT WELLS BASIN	4,581	59 km
2018	BENDER MOUNTAIN	3,797	79 km
2021	WEST	3,588	78 km
2018	BLACK BUTTE	3,124	38 km
2007	MARSHALL PHASE II	2,834	99 km
2004	MAIL DRAW	2,601	99 km
1986	BIG JOE	2,536	99 km
2015	BITTER CREEK	2,372	43 km
2000	SAGE CREEK 3	2,228	34 km
1994	SUBSTATION	2,018	66 km
1998	BOULDERLAK MVD	2,016	86 km
1988	GREEN RIVER	1,924	88 km
2002	PEPPER	1,684	55 km
2002	VENGENCE	1,418	41 km

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

Monthly Weather

Month	Avg Temperature	Precipitation	Summary
January	24°F (-5°C)	0.4 in
February	21°F (-6°C)	0.4 in	Driest
March	30°F (-1°C)	0.5 in
April	39°F (4°C)	0.6 in
May	49°F (9°C)	1.1 in	Wettest
June	58°F (15°C)	0.9 in
July	69°F (21°C)	0.8 in	Warmest
August	64°F (18°C)	0.7 in
September	54°F (12°C)	0.8 in
October	43°F (6°C)	0.7 in
November	28°F (-2°C)	0.4 in
December	19°F (-8°C)	0.4 in	Coldest

Reliance has a seasonal temperature swing of 51°F / from 19°F in December to 69°F in July. Total annual precipitation is 7.8 inches, with May being the wettest month (1.1") and February the driest (0.4").

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