Weather & Climate in Keystone, CO

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

Keystone has a cool climate with an average annual temperature of 38°F (3°C). Winters average 22°F in January while summers reach 57°F in July. The area gets 326 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 21.7 inches (drier than the 38-inch national average). The area receives 153.7 inches of snow annually, making winter weather a significant factor for residents. Air quality is rated Good with a median AQI of 41. The city sits at an elevation of 11,640 feet.

Temperature

22°F Jan (-6°C) 57°F Jul (14°C)

Annual Average	37.5°F
	31% below US avg
January Average	22°F (-6°C)
July Average	57°F (14°C)
Sunny Days	326 days/yr

Geography

Elevation	11,640 ft (3,548 m)
Area	40.6 sq mi (105.2 km²)
Population Density	27/sq mi
Coordinates	39.5739°N, 105.9347°W
Timezone	America/Denver
County	Clear Creek County County
Nearest Airport	Eagle County Regional (EGE) 52 miles away

Precipitation & Snow

Annual Rainfall 21.7"

43% below US avg

Snowfall 153.7"

Wettest Month (Apr) 2.40"

Driest Month (Oct) 1.38"

Air Quality

AQI Median	41.0
Rating	Good

Natural Hazard Risk

Overall Risk	Relatively Low
Risk Score	46.7 / 100
Social Vulnerability	10.6 / 100
Community Resilience	51.5 / 100

Hazard Breakdown

Tornado	Very Low
Earthquake	Very Low
Wildfire	Relatively Moderate
Flood	Relatively Low
Hail	Relatively Moderate
Strong Wind	Very Low
Heat Wave	No Rating
Winter Weather	Relatively Low
Lightning	Relatively Moderate
Ice Storm	Very Low
Drought	No Rating
Cold Wave	Very Low
Landslide	Relatively Moderate
Volcano	Very Low
Avalanche	Very High

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

Earthquake History

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

Aug 9, 2001	11 km NNE of Chacra, Colorado	M4.0	124 km	5 km
Dec 25, 1994	9 km NE of Larkspur, Colorado	M4.0	102 km	10 km
Feb 10, 2006	1 km NNE of Chacra, Colorado	M3.8	129 km	5 km
Jun 6, 2011	17 km NNW of Oak Creek, Colorado	M3.5	133 km	5 km
Dec 23, 1995	7 km WNW of Rock Creek Park, Colorado	M3.5	128 km	5 km
Apr 10, 2011	12 km N of Oak Creek, Colorado	M3.4	124 km	5 km
Aug 21, 2012	12 km SSW of Gypsum, Colorado	M3.4	90 km	5 km
Jan 30, 2017	5 km SW of New Castle, Colorado	M3.3	142 km	5 km
Jan 18, 1997	8 km SE of Westcreek, Colorado	M3.3	89 km	5 km
Jul 8, 1993	9 km ENE of Aspen, Colorado	M3.1	77 km	5 km
Sep 2, 2024	21 km NW of Steamboat Springs, Colorado	M3.1	148 km	2 km
Feb 1, 2019	3 km NW of Glenwood Springs, Colorado	M3.1	122 km	2 km
Jul 22, 2001	6 km WNW of Woodland Park, Colorado	M3.1	93 km	5 km
Jan 26, 2008	12 km NE of Cotopaxi, Colorado	M3.1	129 km	5 km
Feb 7, 2000	19 km NE of Steamboat Springs, Colorado	M3.0	130 km	5 km
Sep 12, 1990	13 km NW of Silverthorne, Colorado	M3.0	27 km	5 km
Mar 30, 2019	7 km NE of Greeley, Colorado	M2.9	149 km	6 km
May 1, 2009	21 km NW of Dotsero, Colorado	M2.9	113 km	5 km
Feb 26, 2008	29 km WNW of Westcreek, Colorado	M2.9	52 km	2 km
Oct 18, 2024	6 km NNE of Chacra, Colorado	M2.9	126 km	5 km

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

Tornado History

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

Date	Rating	Distance	Path	Fatalities
Jun 15, 1988	EF3	88 km	2.5 mi	0
Jun 8, 2014	EF2	78 km	6.0 mi	0
Jun 15, 1988	EF2	88 km	0.5 mi	0
Jun 5, 1988	EF2	95 km	2.0 mi	0
Jun 5, 1988	EF2	85 km	0.5 mi	0
Jun 8, 1986	EF2	90 km	1.1 mi	0
Jul 19, 1985	EF2	91 km	0.5 mi	0
Jun 3, 1981	EF2	88 km	2.3 mi	0
Jun 3, 1981	EF2	78 km	0.1 mi	0
Oct 15, 1980	EF2	79 km	1.5 mi	0
Jun 13, 1977	EF2	36 km	1.0 mi	0
May 30, 1976	EF2	94 km	5.4 mi	0
May 20, 1961	EF2	93 km	2.0 mi	0
Jun 22, 2023	EF1	79 km	6.3 mi	0
Jul 21, 2015	EF1	79 km	0.3 mi	0
Jun 24, 2015	EF1	90 km	2.8 mi	0
Jun 8, 2014	EF1	91 km	0.3 mi	0
Jun 8, 2014	EF1	81 km	0.3 mi	0
Jun 8, 2014	EF1	97 km	0.3 mi	0
Aug 18, 2009	EF1	77 km	9.3 mi	0

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

Wildfire History

20 wildfires (100+ acres) recorded within 100 km. Largest: EAST TROUBLESOME (188,924 acres, 2020).

Year	Name	Acres Burned	Distance
2020	EAST TROUBLESOME	188,924	73 km
2002	HAYMAN	129,417	68 km
2018	SILVER CREEK	20,725	92 km
2020	WILLIAMS FORK	14,679	29 km
2018	WESTON PASS	13,169	61 km
2018	LAKE CHRISTINE	12,506	96 km
1996	BUFFALO CREEK	11,690	62 km
2020	CALWOOD	9,836	83 km
2000	HIGH MEADOWS	9,607	53 km
2001	MVD PSFRXASST 4	7,375	78 km
2021	MARSHALL	6,286	77 km
2010	FOURMILE CANYON	5,865	71 km
2021	MUDDY SLIDE	4,372	94 km
2002	BIG ELK	4,348	91 km
2021	SYLVAN	3,480	69 km
2012	LOWER NORTH FORK FIRE	3,436	65 km
2003	OVERLAND	3,232	80 km
2009	OLD STAGE	3,160	80 km
2002	SCHOONOVER	2,821	72 km
2012	FERN LAKE	2,549	90 km

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

Monthly Weather

Month	Avg Temperature	Precipitation	Summary
January	22°F (-6°C)	1.9 in
February	18°F (-8°C)	1.7 in
March	21°F (-6°C)	2.2 in
April	27°F (-3°C)	2.4 in	Wettest
May	37°F (3°C)	2.2 in
June	46°F (8°C)	1.7 in
July	57°F (14°C)	2.3 in	Warmest
August	51°F (11°C)	2.3 in
September	44°F (7°C)	1.7 in
October	35°F (2°C)	1.4 in	Driest
November	23°F (-5°C)	1.8 in
December	18°F (-8°C)	2.0 in	Coldest

Keystone has a seasonal temperature swing of 40°F / from 18°F in December to 57°F in July. Total annual precipitation is 23.6 inches, with April being the wettest month (2.4") and October the driest (1.4").

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