Weather & Climate in Y-O Ranch, WY

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

Y-O Ranch experiences four distinct seasons with an average annual temperature of 49°F (9°C). Winters average 30°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 14.1 inches (drier than the 38-inch national average). The area receives 39.9 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 4,798 feet.

Temperature

30°F Jan (-1°C) 72°F Jul (22°C)

Annual Average	49.0°F
	9% below US avg
January Average	30°F (-1°C)
July Average	72°F (22°C)
Sunny Days	302 days/yr

Geography

Elevation	4,798 ft (1,462 m)
Area	2.4 sq mi (6.2 km²)
Population Density	139/sq mi
Coordinates	42.0352°N, 104.9230°W
Timezone	America/Denver
County	Platte County County
Nearest Airport	Cheyenne Regional/Jerry Olson Field (CYS) 61 miles away

Precipitation & Snow

Annual Rainfall 14.1"

63% below US avg

Snowfall 39.9"

Wettest Month (May) 2.44"

Driest Month (Jan) 0.28"

Air Quality

AQI Median	34.0
Rating	Good

Natural Hazard Risk

Overall Risk	Very Low
Risk Score	25.7 / 100
Social Vulnerability	83.9 / 100
Community Resilience	13.9 / 100

Hazard Breakdown

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

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

Earthquake History

20 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	150 km	5 km
Aug 29, 2004	16 km NNW of Douglas, Wyoming	M3.8	105 km	5 km
Aug 2, 2021	12 km NW of Rolling Hills, Wyoming	M3.8	135 km	10 km
Oct 10, 1993	41 km W of Esterbrook, Wyoming	M3.7	89 km	5 km
Apr 9, 1996	34 km SW of Edgemont, South Dakota	M3.7	133 km	5 km
Jul 23, 1993	29 km WNW of Esterbrook, Wyoming	M3.7	81 km	5 km
Feb 15, 2004	19 km N of Douglas, Wyoming	M3.5	108 km	10 km
Dec 13, 1993	14 km SW of Esterbrook, Wyoming	M3.2	58 km	5 km
Aug 22, 2016	16 km S of Casper Mountain, Wyoming	M3.2	129 km	5 km
Jul 22, 2020	16 km NW of Rolling Hills, Wyoming	M3.2	138 km	34 km
May 3, 1996	32 km SSW of Edgemont, South Dakota	M3.1	134 km	5 km
Jun 30, 1993	25 km N of Douglas, Wyoming	M3.0	112 km	5 km
Jan 6, 2018	7 km SW of Guernsey, Wyoming	M3.0	23 km	5 km
Nov 2, 1992	5 km ESE of Lusk, Wyoming	M3.0	90 km	5 km
Sep 7, 2019	23 km WSW of Esterbrook, Wyoming	M2.9	63 km	5 km
Apr 13, 2000	37 km W of Esterbrook, Wyoming	M2.9	84 km	5 km
Mar 10, 2011	22 km N of Van Tassell, Wyoming	M2.9	115 km	5 km
Dec 19, 2013	33 km NE of Rock River, Wyoming	M2.8	63 km	12 km
May 28, 2025	9 km ENE of Glendo, Wyoming	M2.6	56 km	5 km
Feb 27, 2021	13 km WNW of Crawford, Nebraska	M2.6	134 km	5 km

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

Tornado History

251 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF4. Total: 3 fatalities, 82 injuries.

Date	Rating	Distance	Path	Fatalities
Jun 27, 1955	EF4	94 km	26.0 mi	2
Jul 28, 2018	EF3	83 km	4.4 mi	0
Jun 6, 2018	EF3	89 km	11.3 mi	0
Jul 16, 1979	EF3	97 km	8.8 mi	1
Jul 20, 1978	EF3	78 km	53.2 mi	0
Jun 27, 1955	EF3	19 km	2.0 mi	0
Jun 26, 1955	EF3	50 km	2.0 mi	0
Jun 23, 2023	EF2	62 km	4.7 mi	0
Sep 10, 2019	EF2	46 km	19.1 mi	0
Jun 6, 2018	EF2	89 km	0.6 mi	0
May 27, 2018	EF2	86 km	1.0 mi	0
Jun 12, 2017	EF2	66 km	25.6 mi	0
Jun 7, 2012	EF2	15 km	20.6 mi	0
Jun 5, 2009	EF2	64 km	8.3 mi	0
May 21, 1998	EF2	80 km	4.0 mi	0
May 24, 1990	EF2	79 km	5.0 mi	0
Jun 20, 1983	EF2	94 km	0.3 mi	0
Jun 5, 1982	EF2	84 km	7.0 mi	0
Jul 28, 1978	EF2	79 km	1.0 mi	0
May 29, 1976	EF2	91 km	0.2 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	45 km
2024	PLEASANT VALLEY	28,249	38 km
2006	OLD CHICAGO	25,218	43 km
2018	BRITANIA MOUNTAIN	23,701	32 km
2016	SIMMONS	20,950	71 km
2002	REESE	19,624	34 km
2022	CARTER CANYON	15,828	98 km
2002	HENSEL	14,439	50 km
2011	SQUAW MTN	14,379	28 km
1996	UNNAMED	14,279	93 km
2012	SAWMILL CANYON	13,438	44 km
2006	TWENTY MILE	11,732	90 km
2000	CO LINE	10,961	52 km
1999	WALKER	10,022	98 km
2012	COW CAMP	8,567	40 km
2006	TRAILER	8,040	38 km
2024	HAPPY JACK	6,585	94 km
2012	RUSSELS CAMP	5,811	92 km
2001	LEROY	5,615	33 km
1996	SPRING CR.	4,682	38 km

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

Monthly Weather

Month	Avg Temperature	Precipitation	Summary
January	30°F (-1°C)	0.3 in	Driest
February	32°F (-0°C)	0.3 in
March	38°F (3°C)	0.7 in
April	46°F (8°C)	1.5 in
May	55°F (13°C)	2.4 in	Wettest
June	65°F (18°C)	2.1 in
July	72°F (22°C)	1.7 in	Warmest
August	69°F (21°C)	1.2 in
September	59°F (15°C)	1.2 in
October	49°F (9°C)	0.9 in
November	36°F (2°C)	0.5 in
December	29°F (-2°C)	0.3 in	Coldest

Y-O Ranch has a seasonal temperature swing of 43°F / from 29°F in December to 72°F in July. Total annual precipitation is 13.2 inches, with May being the wettest month (2.4") and January the driest (0.3").

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