Weather & Climate in Alcova, WY

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

Alcova experiences four distinct seasons with an average annual temperature of 46°F (8°C). Winters average 25°F in January while summers reach 72°F in July. The area gets 302 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 11.2 inches (drier than the 38-inch national average). Air quality is rated Good with a median AQI of 34. The city sits at an elevation of 5,581 feet.

Temperature

25°F Jan (-4°C) 72°F Jul (22°C)

Annual Average	46.3°F
	14% below US avg
January Average	25°F (-4°C)
July Average	72°F (22°C)
Sunny Days	302 days/yr

Geography

Elevation	5,581 ft (1,701 m)
Area	1.3 sq mi (3.2 km²)
Population Density	73/sq mi
Coordinates	42.5533°N, 106.7295°W
Timezone	America/Denver
County	Natrona County County
Nearest Airport	Casper/Natrona County International (CPR) 28 miles away

Precipitation & Snow

Annual Rainfall 11.2"

71% below US avg

Wettest Month (May) 1.89"

Driest Month (Jan) 0.39"

Air Quality

AQI Median	34.0
Rating	Good

Natural Hazard Risk

Overall Risk	Relatively Low
Risk Score	68.9 / 100
Social Vulnerability	20.5 / 100
Community Resilience	57.3 / 100

Hazard Breakdown

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

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

Earthquake History

75 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.3.

Apr 6, 1999	31 km SE of Wamsutter, Wyoming	M4.3	148 km	10 km
Oct 19, 1996	21 km E of Antelope Hills, Wyoming	M4.2	81 km	5 km
May 26, 2000	5 km S of Bairoil, Wyoming	M4.0	80 km	5 km
Nov 3, 2017	57 km S of Ten Sleep, Wyoming	M4.0	120 km	17 km
Oct 10, 1992	25 km SSE of Riverton, Wyoming	M4.0	127 km	5 km
Apr 13, 2021	51 km S of Ten Sleep, Wyoming	M3.9	125 km	12 km
Aug 2, 2021	12 km NW of Rolling Hills, Wyoming	M3.8	81 km	10 km
Mar 19, 2022	5 km NW of Ryan Park, Wyoming	M3.8	134 km	11 km
Aug 29, 2004	16 km NNW of Douglas, Wyoming	M3.8	108 km	5 km
May 17, 2009	24 km WNW of Jeffrey City, Wyoming	M3.7	114 km	5 km
Oct 10, 1993	41 km W of Esterbrook, Wyoming	M3.7	72 km	5 km
Jul 23, 1993	29 km WNW of Esterbrook, Wyoming	M3.7	85 km	5 km
Feb 13, 2023	Wyoming	M3.7	124 km	10 km
Jun 1, 1993	6 km N of Bairoil, Wyoming	M3.7	75 km	5 km
Feb 1, 2003	11 km E of Antelope Hills, Wyoming	M3.7	73 km	5 km
Jun 2, 2023	9 km SSE of Saratoga, Wyoming	M3.6	131 km	1 km
Aug 6, 1998	18 km NNE of Rawlins, Wyoming	M3.6	77 km	10 km
Aug 31, 1992	34 km WNW of Kaycee, Wyoming	M3.6	144 km	5 km
Jul 4, 2021	43 km S of Ten Sleep, Wyoming	M3.6	132 km	17 km
Aug 13, 2004	35 km SW of Alcova, Wyoming	M3.5	35 km	5 km

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

Tornado History

56 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF2. Total: 9 injuries.

Date	Rating	Distance	Path	Fatalities
Jul 21, 1987	EF2	64 km	5.0 mi	0
Jun 18, 1987	EF2	60 km	7.0 mi	0
Jun 5, 1982	EF2	90 km	7.0 mi	0
Jul 20, 1978	EF2	59 km	1.0 mi	0
May 29, 1971	EF2	59 km	0.2 mi	0
Jun 11, 1962	EF2	81 km	52.0 mi	0
Jun 23, 2023	EF1	89 km	10.8 mi	0
Jun 12, 2017	EF1	84 km	0.5 mi	0
Jul 7, 1988	EF1	9 km	0.5 mi	0
Jun 12, 1986	EF1	53 km	1.0 mi	0
Jun 20, 1977	EF1	88 km	0.1 mi	0
Aug 9, 1974	EF1	41 km	0.1 mi	0
May 29, 1964	EF1	73 km	0.5 mi	0
Jul 27, 1962	EF1	46 km	0.5 mi	0
Jun 15, 1962	EF1	75 km	2.0 mi	0
Jun 12, 1962	EF1	25 km	1.0 mi	0
Jul 20, 1958	EF1	45 km	1.9 mi	0
Aug 23, 2019	EF0	52 km	0.8 mi	0
Jul 26, 2018	EF0	51 km	0.2 mi	0
Jun 12, 2017	EF0	50 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: PEDRO MOUNTAIN (21,904 acres, 2019).

Year	Name	Acres Burned	Distance
2019	PEDRO MOUNTAIN	21,904	25 km
1996	GEARY D. 2	15,564	72 km
2020	RR 316	14,274	82 km
2006	JACKSON CANYON	11,686	31 km
2000	ORMSBY	11,539	88 km
2012	SHEEP HERDER HILL COMPLEX	10,759	45 km
2015	STATION	9,845	58 km
2000	HENDERSON	9,624	74 km
1996	BONER	9,414	99 km
1996	COLE CREEK	9,099	68 km
2012	BEAR MOUNTAIN COMPLEX	8,196	50 km
1985	GOAT MTN	6,450	49 km
2012	LITTLE BOX ELDER	6,329	88 km
2000	DEADHORSE	6,252	27 km
2012	RUSSELS CAMP	5,811	74 km
2012	SEMINOE	3,570	44 km
2010	GEARY DOME	3,085	67 km
2006	POISON SPIDER	3,063	41 km
2022	SAND SPRINGS	3,051	85 km
2000	33 MILE	3,049	59 km

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

Monthly Weather

Month	Avg Temperature	Precipitation	Summary
January	25°F (-4°C)	0.4 in	Coldest, Driest
February	26°F (-4°C)	0.5 in
March	33°F (1°C)	0.8 in
April	41°F (5°C)	1.3 in
May	51°F (10°C)	1.9 in	Wettest
June	61°F (16°C)	1.3 in
July	72°F (22°C)	1.0 in	Warmest
August	68°F (20°C)	0.6 in
September	59°F (15°C)	0.8 in
October	48°F (9°C)	0.9 in
November	34°F (1°C)	0.6 in
December	27°F (-3°C)	0.5 in

Alcova has a seasonal temperature swing of 47°F / from 25°F in January to 72°F in July. Total annual precipitation is 10.6 inches, with May being the wettest month (1.9") and January the driest (0.4").

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