Weather & Climate in Opal, WY

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

Opal has a cool climate with an average annual temperature of 38°F (3°C). Winters average 14°F in January while summers reach 64°F in July. The area gets 322 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 7.6 inches (drier than the 38-inch national average). The area receives 26.5 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 6,662 feet.

Temperature

14°F Jan (-10°C) 64°F Jul (18°C)

Annual Average	38.2°F
	29% below US avg
January Average	14°F (-10°C)
July Average	64°F (18°C)
Sunny Days	322 days/yr

Geography

Elevation	6,662 ft (2,031 m)
Area	0.4 sq mi (1.0 km²)
Population Density	139/sq mi
Coordinates	41.7681°N, 110.3241°W
Timezone	America/Denver
County	Uinta County County
Nearest Airport	Southwest Wyoming Regional (RKS) 66 miles away

Precipitation & Snow

Annual Rainfall 7.6"

80% below US avg

Snowfall 26.5"

Wettest Month (May) 1.06"

Driest Month (Feb) 0.35"

Air Quality

AQI Median	34.0
Rating	Good

Natural Hazard Risk

Overall Risk	Very Low
Risk Score	16.7 / 100
Social Vulnerability	15.0 / 100
Community Resilience	12.5 / 100

Hazard Breakdown

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

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

Earthquake History

1,148 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M5.8.

Feb 3, 1994	4 km SSE of Auburn, Wyoming	M5.8	123 km	8 km
Sep 2, 2017	12 km E of Soda Springs, Idaho	M5.3	135 km	10 km
Sep 10, 2017	9 km NNW of Georgetown, Idaho	M5.0	126 km	10 km
Apr 15, 2010	9 km NE of Randolph, Utah	M4.9	64 km	10 km
Feb 11, 1994	3 km SSE of Auburn, Wyoming	M4.8	124 km	5 km
Sep 11, 2017	9 km NW of Georgetown, Idaho	M4.7	126 km	8 km
Feb 4, 1994	4 km WNW of Fairview, Wyoming	M4.7	120 km	5 km
Sep 10, 2017	12 km ESE of Soda Springs, Idaho	M4.7	133 km	5 km
Sep 3, 2017	15 km ESE of Soda Springs, Idaho	M4.7	131 km	10 km
Sep 3, 2017	10 km E of Soda Springs, Idaho	M4.7	135 km	8 km
Sep 6, 2017	11 km NNW of Georgetown, Idaho	M4.6	129 km	10 km
Sep 4, 2017	13 km ESE of Soda Springs, Idaho	M4.5	133 km	6 km
Feb 7, 1994	4 km SW of Fairview, Wyoming	M4.5	114 km	5 km
Feb 3, 1994	0 km NNE of Auburn, Wyoming	M4.4	128 km	5 km
Feb 3, 1994	13 km WSW of Auburn, Wyoming	M4.4	126 km	5 km
Jan 26, 2018	5 km NNW of Georgetown, Idaho	M4.4	122 km	10 km
Feb 10, 1994	3 km WSW of Auburn, Wyoming	M4.4	128 km	5 km
Feb 3, 1994	2 km SW of Auburn, Wyoming	M4.4	126 km	5 km
Sep 5, 2017	12 km NNW of Georgetown, Idaho	M4.3	130 km	3 km
Sep 5, 2017	13 km NNW of Georgetown, Idaho	M4.3	130 km	6 km

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

Tornado History

28 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF2.

Date	Rating	Distance	Path	Fatalities
May 10, 1950	EF2	66 km	2.0 mi	0
Jul 10, 2001	EF1	17 km	5.0 mi	0
Apr 20, 2001	EF1	69 km	0.2 mi	0
Apr 14, 2000	EF1	69 km	0.5 mi	0
Jul 31, 1978	EF1	98 km	1.0 mi	0
Jun 27, 1974	EF1	75 km	0.1 mi	0
Sep 9, 1973	EF1	69 km	0.1 mi	0
Jun 23, 1965	EF1	75 km	0.6 mi	0
May 25, 1954	EF1	83 km	0.5 mi	0
Apr 26, 2019	EF0	90 km	0.1 mi	0
May 28, 2018	EF0	37 km	3.5 mi	0
May 7, 2014	EF0	79 km	0.5 mi	0
Sep 15, 2013	EF0	55 km	0.1 mi	0
Jul 7, 2013	EF0	98 km	1.0 mi	0
Jul 19, 1997	EF0	97 km	3.0 mi	0
Jun 14, 1997	EF0	63 km	0.5 mi	0
Jun 10, 1997	EF0	92 km	0.1 mi	0
Sep 9, 1991	EF0	50 km	0.5 mi	0
Sep 9, 1991	EF0	54 km	0.4 mi	0
May 2, 1991	EF0	46 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: FONTENELLE (58,125 acres, 2012).

Year	Name	Acres Burned	Distance
2012	FONTENELLE	58,125	87 km
2000	WLD HORSE	41,881	96 km
1999	BRIDGER BA	15,227	50 km
2000	FONTENELLE	14,894	56 km
2018	NORTH EDEN	14,398	65 km
2007	RED CANYON RX BURN-H	13,464	37 km
1994	DRY CANYON 2	10,927	80 km
2010	POLE CREEK STANDS	6,900	51 km
2010	WINDMILL	5,935	63 km
1988	LITTLEBRYN	5,300	61 km
2012	HELLS HOLLOW	4,758	98 km
2005	ROCK CREEK RX	4,302	42 km
1994	EDGAR CANYON	4,260	91 km
1992	DESERET/SPRING CANYON	3,861	94 km
2002	COMMISARY	3,840	43 km
2017	POLE CREEK	3,395	54 km
1988	SIESMIC	2,969	29 km
2007	SWEETWATER	2,942	69 km
1985	BOUNDARY	2,550	72 km
1997	COAL CREEK	2,447	61 km

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

Monthly Weather

Month	Avg Temperature	Precipitation	Summary
January	14°F (-10°C)	0.4 in	Coldest
February	20°F (-7°C)	0.4 in	Driest
March	29°F (-2°C)	0.4 in
April	38°F (3°C)	0.8 in
May	48°F (9°C)	1.1 in	Wettest
June	57°F (14°C)	1.0 in
July	64°F (18°C)	0.8 in	Warmest
August	62°F (17°C)	0.8 in
September	52°F (11°C)	0.9 in
October	41°F (5°C)	0.7 in
November	27°F (-3°C)	0.5 in
December	17°F (-8°C)	0.4 in

Opal has a seasonal temperature swing of 50°F / from 14°F in January to 64°F in July. Total annual precipitation is 8.0 inches, with May being the wettest month (1.1") and February the driest (0.4").

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