Weather & Climate in Basin, WY

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

Basin experiences four distinct seasons with an average annual temperature of 49°F (9°C). Winters average 21°F in January while summers reach 77°F in July. The area gets 293 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 7.2 inches (drier than the 38-inch national average). The area receives 20.1 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 3,907 feet.

Temperature

21°F Jan (-6°C) 77°F Jul (25°C)

Annual Average	48.9°F
	9% below US avg
January Average	21°F (-6°C)
July Average	77°F (25°C)
Sunny Days	293 days/yr

Geography

Elevation	3,907 ft (1,191 m)
Area	2.4 sq mi (6.3 km²)
Population Density	553/sq mi
Coordinates	44.3806°N, 108.0471°W
Timezone	America/Denver
County	Big Horn County County
Nearest Airport	Worland Municipal (WRL) 29 miles away

Precipitation & Snow

Annual Rainfall 7.2"

81% below US avg

Snowfall 20.1"

Wettest Month (May) 1.34"

Driest Month (Feb) 0.20"

Air Quality

AQI Median	34.0
Rating	Good

Natural Hazard Risk

Overall Risk	Very Low
Risk Score	31.1 / 100
Social Vulnerability	52.6 / 100
Community Resilience	7.7 / 100

Hazard Breakdown

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

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

Earthquake History

38 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.0.

Nov 3, 2017	57 km S of Ten Sleep, Wyoming	M4.0	109 km	17 km
Apr 13, 2021	51 km S of Ten Sleep, Wyoming	M3.9	105 km	12 km
Feb 13, 2023	Wyoming	M3.7	106 km	10 km
Jul 4, 2021	43 km S of Ten Sleep, Wyoming	M3.6	98 km	17 km
Aug 31, 1992	34 km WNW of Kaycee, Wyoming	M3.6	101 km	5 km
Jan 9, 2007	7 km ENE of East Thermopolis, Wyoming	M3.5	80 km	5 km
Aug 7, 1991	31 km NNW of Pavillion, Wyoming	M3.5	117 km	5 km
Nov 16, 1993	17 km SSE of Ten Sleep, Wyoming	M3.5	77 km	5 km
Sep 3, 2023	32 km NW of Kaycee, Wyoming	M3.3	103 km	5 km
Apr 5, 2002	7 km W of South Flat, Wyoming	M3.3	49 km	5 km
Jul 21, 2023	Eastern Montana	M3.2	140 km	5 km
Oct 31, 2017	56 km S of Ten Sleep, Wyoming	M3.2	107 km	15 km
Nov 9, 1999	58 km ENE of Shoshoni, Wyoming	M3.1	110 km	5 km
Dec 16, 2012	40 km W of Owl Creek, Wyoming	M3.1	105 km	5 km
Jan 6, 2017	22 km SW of Owl Creek, Wyoming	M3.0	99 km	13 km
Feb 13, 1998	12 km NE of Hyattville, Wyoming	M3.0	43 km	5 km
Nov 8, 2000	40 km ENE of Shoshoni, Wyoming	M3.0	109 km	5 km
Oct 25, 2009	34 km S of Buffalo, Wyoming	M3.0	117 km	5 km
Feb 22, 1992	30 km E of Buffalo, Wyoming	M2.9	138 km	5 km
Mar 2, 2014	9 km SE of Washakie Ten, Wyoming	M2.9	42 km	0 km

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

Tornado History

64 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF3. Total: 1 fatality, 4 injuries.

Date	Rating	Distance	Path	Fatalities
Aug 2, 1985	EF3	51 km	0.2 mi	0
Jun 1, 2018	EF2	83 km	1.0 mi	0
Jun 1, 2018	EF2	85 km	1.0 mi	0
Jul 10, 2001	EF2	63 km	0.5 mi	0
Jul 11, 1978	EF2	70 km	0.4 mi	0
Jul 4, 1978	EF2	14 km	5.0 mi	0
Jul 24, 1967	EF2	10 km	0.1 mi	0
Jun 26, 1964	EF2	69 km	1.0 mi	0
Jul 9, 1962	EF2	15 km	0.5 mi	0
Jun 12, 1962	EF2	30 km	0.5 mi	0
Jun 26, 1959	EF2	42 km	9.2 mi	1
Jun 3, 1958	EF2	27 km	0.2 mi	0
Jun 19, 2019	EF1	80 km	4.1 mi	0
Aug 30, 2010	EF1	63 km	4.6 mi	0
Jun 1, 2009	EF1	24 km	0.4 mi	0
Jun 26, 2001	EF1	11 km	0.7 mi	0
Jun 6, 1997	EF1	21 km	1.0 mi	0
May 18, 1991	EF1	80 km	0.2 mi	0
May 24, 1990	EF1	96 km	0.2 mi	0
Aug 25, 1986	EF1	75 km	1.0 mi	0

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

Wildfire History

20 wildfires (100+ acres) recorded within 100 km. Largest: EBLACK MTN (53,211 acres, 1996).

Year	Name	Acres Burned	Distance
1996	EBLACK MTN	53,211	71 km
1996	BATES	47,060	92 km
2018	TEREK	43,872	31 km
2020	NEIBER	17,594	66 km
1988	LOST	13,081	83 km
2007	BONE CREEK	12,776	42 km
1999	ROOSTER	9,624	79 km
2021	CRATER RIDGE	8,147	67 km
1996	WILLOW	7,723	87 km
1996	BUFFALO 2	7,173	72 km
2018	DENVER JAKE	6,973	69 km
2003	LITTLE HORN II	5,889	72 km
2012	GILEAD	5,374	88 km
2002	RED WAFFLE	5,060	86 km
1996	NBROKENBAC	4,921	55 km
2005	BIG HORN	4,899	86 km
2012	OTTER CREEK-UPPER BEE	4,786	85 km
2007	LITTLE GOOSE	4,767	82 km
2000	MUDDYCRK	4,601	88 km
2000	MIDDLECREE	4,534	81 km

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

Monthly Weather

Month	Avg Temperature	Precipitation	Summary
January	21°F (-6°C)	0.3 in
February	25°F (-4°C)	0.2 in	Driest
March	37°F (3°C)	0.4 in
April	46°F (8°C)	0.8 in
May	56°F (13°C)	1.3 in	Wettest
June	66°F (19°C)	1.1 in
July	77°F (25°C)	0.6 in	Warmest
August	71°F (22°C)	0.5 in
September	59°F (15°C)	0.9 in
October	46°F (8°C)	0.7 in
November	31°F (-1°C)	0.4 in
December	20°F (-7°C)	0.3 in	Coldest

Basin has a seasonal temperature swing of 57°F / from 20°F in December to 77°F in July. Total annual precipitation is 7.5 inches, with May being the wettest month (1.3") and February the driest (0.2").

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