Weather & Climate in Midwest, WY

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

Midwest has a cool climate with an average annual temperature of 45°F (7°C). Winters average 24°F in January while summers reach 70°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 12.4 inches (drier than the 38-inch national average). The area receives 45.9 inches of snow annually, making winter weather a significant factor for residents. Air quality is rated Good with a median AQI of 34. The city sits at an elevation of 4,856 feet.

Temperature

24°F Jan (-5°C) 70°F Jul (21°C)

Annual Average	45.0°F
	17% below US avg
January Average	24°F (-5°C)
July Average	70°F (21°C)
Sunny Days	302 days/yr

Geography

Elevation	4,856 ft (1,480 m)
Area	0.4 sq mi (1.1 km²)
Population Density	445/sq mi
Coordinates	43.4108°N, 106.2773°W
Timezone	America/Denver
County	Natrona County County
Nearest Airport	Casper/Natrona County International (CPR) 36 miles away

Precipitation & Snow

Annual Rainfall 12.4"

67% below US avg

Snowfall 45.9"

Wettest Month (May) 2.48"

Driest Month (Jan) 0.47"

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

52 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	40 km	5 km
Nov 3, 2017	57 km S of Ten Sleep, Wyoming	M4.0	90 km	17 km
Apr 13, 2021	51 km S of Ten Sleep, Wyoming	M3.9	90 km	12 km
Aug 29, 2004	16 km NNW of Douglas, Wyoming	M3.8	87 km	5 km
Aug 2, 2021	12 km NW of Rolling Hills, Wyoming	M3.8	54 km	10 km
Feb 1, 2003	11 km E of Antelope Hills, Wyoming	M3.7	38 km	5 km
Feb 13, 2023	Wyoming	M3.7	92 km	10 km
Oct 10, 1993	41 km W of Esterbrook, Wyoming	M3.7	115 km	5 km
Jul 23, 1993	29 km WNW of Esterbrook, Wyoming	M3.7	114 km	5 km
Aug 31, 1992	34 km WNW of Kaycee, Wyoming	M3.6	77 km	5 km
Jul 4, 2021	43 km S of Ten Sleep, Wyoming	M3.6	92 km	17 km
Aug 13, 2004	35 km SW of Alcova, Wyoming	M3.5	136 km	5 km
Feb 15, 2004	19 km N of Douglas, Wyoming	M3.5	88 km	10 km
Nov 16, 1993	17 km SSE of Ten Sleep, Wyoming	M3.5	103 km	5 km
Oct 8, 2009	31 km SSW of Alcova, Wyoming	M3.4	133 km	5 km
Sep 3, 2023	32 km NW of Kaycee, Wyoming	M3.3	77 km	5 km
Mar 10, 1993	27 km W of Midwest, Wyoming	M3.2	28 km	5 km
Oct 31, 2017	56 km S of Ten Sleep, Wyoming	M3.2	96 km	15 km
Dec 13, 1993	14 km SW of Esterbrook, Wyoming	M3.2	136 km	5 km
Aug 22, 2016	16 km S of Casper Mountain, Wyoming	M3.2	92 km	5 km

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

Tornado History

108 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF2. Total: 2 fatalities, 31 injuries.

Date	Rating	Distance	Path	Fatalities
Jun 23, 2023	EF2	75 km	3.8 mi	0
Jun 1, 2018	EF2	96 km	1.0 mi	0
Jun 1, 2018	EF2	96 km	1.0 mi	0
Jun 12, 2017	EF2	45 km	1.6 mi	0
Aug 12, 2005	EF2	74 km	1.5 mi	2
Jul 21, 1987	EF2	48 km	5.0 mi	0
Jun 18, 1987	EF2	46 km	7.0 mi	0
Jul 20, 1978	EF2	46 km	1.0 mi	0
Jul 30, 1975	EF2	56 km	12.4 mi	0
May 29, 1971	EF2	55 km	0.2 mi	0
Jun 11, 1962	EF2	21 km	52.0 mi	0
Jun 12, 1953	EF2	96 km	2.0 mi	0
Jun 23, 2023	EF1	14 km	10.8 mi	0
May 20, 2007	EF1	88 km	2.0 mi	0
Jun 12, 2001	EF1	98 km	27.0 mi	0
Aug 11, 1999	EF1	50 km	0.2 mi	0
May 24, 1990	EF1	65 km	2.0 mi	0
Jun 12, 1986	EF1	52 km	1.0 mi	0
Jun 13, 1984	EF1	81 km	2.0 mi	0
Jul 17, 1983	EF1	74 km	1.5 mi	0

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

Wildfire History

20 wildfires (100+ acres) recorded within 100 km. Largest: HOUSE DRAW (167,966 acres, 2024).

Year	Name	Acres Burned	Distance
2024	HOUSE DRAW	167,966	75 km
1996	OLMSTEAD D	44,562	79 km
2010	ORPHA	25,839	88 km
1999	CLARKELEN	21,432	78 km
2024	WILDCAT CREEK	18,751	96 km
1996	GEARY D. 2	15,564	55 km
2006	SAWMILL	15,379	17 km
2006	OUTLAW 2	12,279	60 km
2006	JACKSON CANYON	11,686	76 km
2000	ORMSBY	11,539	36 km
2020	RENO	10,830	60 km
2012	SHEEP HERDER HILL COMPLEX	10,759	75 km
2015	STATION	9,845	59 km
1996	HENRYS	9,839	51 km
2000	HENDERSON	9,624	28 km
1996	BONER	9,414	72 km
1996	COLE CREEK	9,099	53 km
1988	ROCHELLE HILLS 2	8,718	98 km
1996	WILLOW	7,723	97 km
1999	ANTELOPE	7,479	66 km

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

Monthly Weather

Month	Avg Temperature	Precipitation	Summary
January	24°F (-5°C)	0.5 in	Coldest, Driest
February	27°F (-3°C)	0.6 in
March	35°F (2°C)	0.9 in
April	43°F (6°C)	1.6 in
May	53°F (12°C)	2.5 in	Wettest
June	63°F (17°C)	1.9 in
July	70°F (21°C)	1.3 in	Warmest
August	69°F (21°C)	0.8 in
September	59°F (15°C)	0.9 in
October	47°F (8°C)	1.1 in
November	32°F (0°C)	0.8 in
December	24°F (-4°C)	0.6 in

Midwest has a seasonal temperature swing of 47°F / from 24°F in January to 70°F in July. Total annual precipitation is 13.3 inches, with May being the wettest month (2.5") and January the driest (0.5").

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