Weather & Climate in Casper Mountain, WY

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

Casper Mountain experiences four distinct seasons with an average annual temperature of 47°F (8°C). Winters average 27°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 15.9 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 8,060 feet.

Temperature

27°F Jan (-3°C) 72°F Jul (22°C)

Annual Average	47.1°F
	13% below US avg
January Average	27°F (-3°C)
July Average	72°F (22°C)
Sunny Days	302 days/yr

Geography

Elevation	8,060 ft (2,457 m)
Area	10.4 sq mi (26.8 km²)
Population Density	18/sq mi
Coordinates	42.7416°N, 106.3081°W
Timezone	America/Denver
County	Natrona County County
Nearest Airport	Casper/Natrona County International (CPR) 14 miles away

Precipitation & Snow

Annual Rainfall 15.9"

58% below US avg

Wettest Month (May) 2.28"

Driest Month (Jan) 0.59"

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

63 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.2.

Oct 19, 1996	21 km E of Antelope Hills, Wyoming	M4.2	44 km	5 km
Nov 3, 2017	57 km S of Ten Sleep, Wyoming	M4.0	123 km	17 km
May 26, 2000	5 km S of Bairoil, Wyoming	M4.0	120 km	5 km
Apr 13, 2021	51 km S of Ten Sleep, Wyoming	M3.9	126 km	12 km
Aug 29, 2004	16 km NNW of Douglas, Wyoming	M3.8	69 km	5 km
Aug 2, 2021	12 km NW of Rolling Hills, Wyoming	M3.8	42 km	10 km
Jul 23, 1993	29 km WNW of Esterbrook, Wyoming	M3.7	58 km	5 km
Feb 13, 2023	Wyoming	M3.7	126 km	10 km
Jun 1, 1993	6 km N of Bairoil, Wyoming	M3.7	115 km	5 km
Feb 1, 2003	11 km E of Antelope Hills, Wyoming	M3.7	39 km	5 km
Oct 10, 1993	41 km W of Esterbrook, Wyoming	M3.7	51 km	5 km
May 17, 2009	24 km WNW of Jeffrey City, Wyoming	M3.7	150 km	5 km
Aug 31, 1992	34 km WNW of Kaycee, Wyoming	M3.6	134 km	5 km
Jul 4, 2021	43 km S of Ten Sleep, Wyoming	M3.6	133 km	17 km
Aug 6, 1998	18 km NNE of Rawlins, Wyoming	M3.6	114 km	10 km
Feb 15, 2004	19 km N of Douglas, Wyoming	M3.5	77 km	10 km
Aug 13, 2004	35 km SW of Alcova, Wyoming	M3.5	73 km	5 km
Oct 8, 2009	31 km SSW of Alcova, Wyoming	M3.4	68 km	5 km
Jan 19, 2022	8 km ESE of Saratoga, Wyoming	M3.3	150 km	5 km
Aug 26, 2022	27 km E of Bairoil, Wyoming	M3.3	94 km	5 km

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

Tornado History

76 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF3. Total: 13 injuries.

Date	Rating	Distance	Path	Fatalities
Jul 28, 2018	EF3	66 km	4.4 mi	0
Jul 21, 1987	EF2	55 km	5.0 mi	0
Jun 18, 1987	EF2	29 km	7.0 mi	0
Jun 5, 1982	EF2	58 km	7.0 mi	0
Jul 20, 1978	EF2	29 km	1.0 mi	0
May 29, 1971	EF2	22 km	0.2 mi	0
Jun 11, 1962	EF2	54 km	52.0 mi	0
Jun 23, 2023	EF1	62 km	10.8 mi	0
Jul 28, 2018	EF1	74 km	1.8 mi	0
Jun 12, 2017	EF1	52 km	0.5 mi	0
Jul 7, 1988	EF1	48 km	0.5 mi	0
Jun 12, 1986	EF1	41 km	1.0 mi	0
Jun 13, 1984	EF1	95 km	2.0 mi	0
Jun 5, 1982	EF1	72 km	7.0 mi	0
Jun 20, 1977	EF1	47 km	0.1 mi	0
May 8, 1975	EF1	79 km	0.1 mi	0
Aug 9, 1974	EF1	36 km	0.1 mi	0
Jun 14, 1965	EF1	91 km	0.2 mi	0
Jul 27, 1962	EF1	12 km	0.5 mi	0
Jun 15, 1962	EF1	70 km	2.0 mi	0

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

Wildfire History

20 wildfires (100+ acres) recorded within 100 km. Largest: ARAPAHO (100,043 acres, 2012).

Year	Name	Acres Burned	Distance
2012	ARAPAHO	100,043	94 km
1996	OLMSTEAD D	44,562	72 km
2010	ORPHA	25,839	78 km
2019	PEDRO MOUNTAIN	21,904	62 km
1996	GEARY D. 2	15,564	32 km
2006	SAWMILL	15,379	82 km
2002	HENSEL	14,439	89 km
2006	JACKSON CANYON	11,686	11 km
2000	ORMSBY	11,539	51 km
2012	SHEEP HERDER HILL COMPLEX	10,759	6 km
1999	WALKER	10,022	94 km
2015	STATION	9,845	19 km
1996	HENRYS	9,839	73 km
2010	WILLOW CREEK	9,706	99 km
2000	HENDERSON	9,624	50 km
1996	BONER	9,414	59 km
1996	COLE CREEK	9,099	29 km
2012	COW CAMP	8,567	99 km
2012	BEAR MOUNTAIN COMPLEX	8,196	90 km
1985	GOAT MTN	6,450	78 km

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

Monthly Weather

Month	Avg Temperature	Precipitation	Summary
January	27°F (-3°C)	0.6 in	Driest
February	25°F (-4°C)	0.6 in	Coldest
March	31°F (-1°C)	0.9 in
April	38°F (3°C)	1.7 in
May	48°F (9°C)	2.3 in	Wettest
June	58°F (14°C)	1.7 in
July	72°F (22°C)	1.3 in	Warmest
August	65°F (18°C)	0.8 in
September	56°F (13°C)	1.0 in
October	45°F (7°C)	1.0 in
November	32°F (0°C)	0.8 in
December	25°F (-4°C)	0.6 in

Casper Mountain has a seasonal temperature swing of 48°F / from 25°F in February to 72°F in July. Total annual precipitation is 13.3 inches, with May being the wettest month (2.3") and January the driest (0.6").

View full profile of Casper Mountain, WY →