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Weather & Climate in Glendo, WY

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

Glendo experiences four distinct seasons with an average annual temperature of 46°F (8°C). Winters average 26°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 14.5 inches (drier than the 38-inch national average). The area receives 59.0 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 4,729 feet.

Temperature

26°F Jan (-4°C) 72°F Jul (22°C)
Annual Average46.3°F
14% below US avg
January Average26°F (-4°C)
July Average72°F (22°C)
Sunny Days302 days/yr

Geography

Elevation4,729 ft (1,441 m)
Area0.2 sq mi (0.5 km²)
Population Density408/sq mi
Coordinates42.5049°N, 105.0250°W
TimezoneAmerica/Denver
CountyConverse County County
Nearest AirportCasper/Natrona County International (CPR)
78 miles away

Precipitation & Snow

Annual Rainfall 14.5"
62% below US avg
Snowfall 59.0"
Wettest Month (May) 2.40"
Driest Month (Jan) 0.35"

Air Quality

AQI Median34.0
RatingGood

Natural Hazard Risk

Overall RiskVery Low
Risk Score31.4 / 100
Social Vulnerability42.4 / 100
Community Resilience12.3 / 100

Hazard Breakdown

Tornado Very Low
Earthquake Very Low
Wildfire Relatively Moderate
Flood Relatively Low
Hail Relatively Low
Strong Wind Very Low
Heat Wave Very Low
Winter Weather Relatively Moderate
Lightning Relatively Low
Ice Storm Very Low
Drought Very Low
Cold Wave Relatively Moderate
Landslide Very Low
Avalanche Very Low
Source: FEMA National Risk Index v1.20 (Dec 2025)

Earthquake History

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

Oct 19, 1996 21 km E of Antelope Hills, Wyoming M4.2 106 km 5 km
Aug 29, 2004 16 km NNW of Douglas, Wyoming M3.8 57 km 5 km
Aug 2, 2021 12 km NW of Rolling Hills, Wyoming M3.8 92 km 10 km
Feb 1, 2003 11 km E of Antelope Hills, Wyoming M3.7 114 km 5 km
Apr 9, 1996 34 km SW of Edgemont, South Dakota M3.7 98 km 5 km
Jul 23, 1993 29 km WNW of Esterbrook, Wyoming M3.7 56 km 5 km
Oct 10, 1993 41 km W of Esterbrook, Wyoming M3.7 70 km 5 km
Feb 15, 2004 19 km N of Douglas, Wyoming M3.5 57 km 10 km
Mar 26, 2021 10 km E of Edgemont, South Dakota M3.4 140 km 5 km
Jul 22, 2020 16 km NW of Rolling Hills, Wyoming M3.2 96 km 34 km
Dec 13, 1993 14 km SW of Esterbrook, Wyoming M3.2 43 km 5 km
Aug 22, 2016 16 km S of Casper Mountain, Wyoming M3.2 105 km 5 km
May 3, 1996 32 km SSW of Edgemont, South Dakota M3.1 102 km 5 km
Nov 2, 1992 5 km ESE of Lusk, Wyoming M3.0 58 km 5 km
Jan 6, 2018 7 km SW of Guernsey, Wyoming M3.0 36 km 5 km
Jun 30, 1993 25 km N of Douglas, Wyoming M3.0 61 km 5 km
Feb 1, 2000 34 km S of Alcova, Wyoming M3.0 143 km 5 km
Sep 7, 2019 23 km WSW of Esterbrook, Wyoming M2.9 53 km 5 km
Apr 13, 2000 37 km W of Esterbrook, Wyoming M2.9 66 km 5 km
Mar 10, 2011 22 km N of Van Tassell, Wyoming M2.9 86 km 5 km
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.

Tornado History

192 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF3. Total: 17 injuries.

Date Rating Distance Path Fatalities
Jul 28, 2018 EF3 43 km 4.4 mi 0
Jul 20, 1978 EF3 92 km 53.2 mi 0
Jun 27, 1955 EF3 70 km 2.0 mi 0
Jun 26, 1955 EF3 83 km 2.0 mi 0
Sep 10, 2019 EF2 44 km 19.1 mi 0
Jun 12, 2017 EF2 73 km 25.6 mi 0
Jun 7, 2012 EF2 51 km 20.6 mi 0
Jun 13, 1984 EF2 62 km 4.0 mi 0
Jun 5, 1982 EF2 50 km 7.0 mi 0
Jun 5, 1982 EF2 67 km 1.0 mi 0
Jul 28, 1978 EF2 65 km 5.0 mi 0
Jul 28, 1978 EF2 85 km 1.0 mi 0
Apr 12, 1967 EF2 79 km 12.6 mi 0
Jun 14, 1963 EF2 99 km 0.5 mi 0
Aug 21, 1960 EF2 86 km 0.1 mi 0
Jun 26, 1955 EF2 29 km 2.3 mi 0
Jun 7, 2022 EF1 71 km 3.5 mi 0
Jul 28, 2018 EF1 34 km 1.8 mi 0
Jun 12, 2017 EF1 57 km 0.5 mi 0
May 15, 2015 EF1 94 km 9.8 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
1996 OLMSTEAD D 44,562 66 km
2024 PLEASANT VALLEY 28,249 39 km
2010 ORPHA 25,839 59 km
2006 OLD CHICAGO 25,218 26 km
2018 BRITANIA MOUNTAIN 23,701 51 km
2016 SIMMONS 20,950 77 km
2002 REESE 19,624 59 km
1996 GEARY D. 2 15,564 96 km
2002 HENSEL 14,439 37 km
2011 SQUAW MTN 14,379 66 km
1996 UNNAMED 14,279 98 km
2012 SAWMILL CANYON 13,438 16 km
2006 TWENTY MILE 11,732 37 km
2011 THOMPSON 10,519 84 km
1999 WALKER 10,022 45 km
1996 HENRYS 9,839 97 km
2010 WILLOW CREEK 9,706 57 km
1996 BONER 9,414 71 km
2012 COW CAMP 8,567 46 km
Source: NIFC/IRWIN Wildfire Records (100+ acres).

Monthly Weather

Month Avg Temperature Precipitation Summary
January 26°F (-4°C) 0.4 in Driest
February 29°F (-2°C) 0.4 in
March 36°F (2°C) 0.8 in
April 44°F (7°C) 1.5 in
May 54°F (12°C) 2.4 in Wettest
June 64°F (18°C) 2.1 in
July 72°F (22°C) 1.6 in Warmest
August 69°F (21°C) 1.0 in
September 59°F (15°C) 1.1 in
October 47°F (9°C) 0.8 in
November 34°F (1°C) 0.6 in
December 25°F (-4°C) 0.4 in Coldest

Glendo has a seasonal temperature swing of 46°F / from 25°F in December to 72°F in July. Total annual precipitation is 12.9 inches, with May being the wettest month (2.4") and January the driest (0.4").

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