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Weather & Climate in Stonewall Gap, CO
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Stonewall Gap has a cool climate with an average annual temperature of 44°F (7°C). Winters average 22°F in January while summers reach 65°F in July. The area gets 330 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 9.0 inches (drier than the 38-inch national average). Air quality is rated Good with a median AQI of 41. The city sits at an elevation of 7,976 feet.
Temperature
22°F Jan (-6°C)
65°F Jul (18°C)
| Annual Average | 44.0°F |
| 19% below US avg | |
| January Average | 22°F (-6°C) |
| July Average | 65°F (18°C) |
| Sunny Days | 330 days/yr |
Geography
| Elevation | 7,976 ft (2,431 m) |
| Area | 1.9 sq mi (5.0 km²) |
| Population Density | 32/sq mi |
| Coordinates | 37.1605°N, 105.0342°W |
| Timezone | America/Denver |
| County | Costilla County County |
| Nearest Airport | San Luis Valley Regional/Bergman Field (ALS) 50 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 41.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Very Low |
| Risk Score | 6.6 / 100 |
| Social Vulnerability | 96.5 / 100 |
| Community Resilience | 0.6 / 100 |
Hazard Breakdown
| Tornado | Very Low |
| Earthquake | Very Low |
| Wildfire | Relatively Low |
| Flood | Very 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 Moderate |
| Cold Wave | Very Low |
| Landslide | Relatively Low |
| Volcano | No Rating |
| Avalanche | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
340 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M5.3.
| Aug 23, 2011 | 6 km S of Valdez, Colorado | M5.3 | 32 km | 4 km |
| Aug 10, 2005 | 20 km S of Weston, Colorado | M5.0 | 30 km | 5 km |
| Aug 22, 2011 | 9 km SSW of Starkville, Colorado | M4.7 | 45 km | 5 km |
| Sep 5, 2001 | 0 km SE of Cokedale, Colorado | M4.5 | 37 km | 5 km |
| Mar 22, 2004 | 30 km S of Weston, Colorado | M4.4 | 38 km | 5 km |
| Jan 3, 2007 | 8 km SSW of Weston, Colorado | M4.4 | 16 km | 5 km |
| Mar 10, 2023 | 6 km NNE of Segundo, Colorado | M4.3 | 27 km | 6 km |
| Aug 1, 2004 | 31 km S of Stonewall Gap, Colorado | M4.3 | 33 km | 5 km |
| Jun 19, 2023 | Colorado | M4.1 | 52 km | 6 km |
| Aug 10, 2005 | 20 km SSW of Segundo, Colorado | M4.1 | 30 km | 5 km |
| Jul 29, 2009 | 32 km NNE of Cimarron, New Mexico | M4.1 | 44 km | 5 km |
| Sep 13, 2011 | 20 km S of Sequndo, Colorado | M4.0 | 36 km | 5 km |
| Sep 4, 2001 | 2 km W of Cokedale, Colorado | M4.0 | 34 km | 5 km |
| Feb 6, 2016 | Colorado | M4.0 | 11 km | 2 km |
| Aug 23, 2011 | 7 km S of Valdez, Colorado | M4.0 | 33 km | 5 km |
| Aug 26, 2023 | 19 km SSW of Weston, Colorado | M4.0 | 23 km | 4 km |
| Sep 16, 2011 | 26 km S of Sequndo, Colorado | M3.9 | 40 km | 5 km |
| Aug 23, 2016 | 18 km SSW of Weston, CO | M3.9 | 21 km | 4 km |
| Aug 20, 2015 | 7 km WSW of Weston, Colorado | M3.9 | 12 km | 1 km |
| Mar 10, 2023 | 5 km N of Sequndo, Colorado | M3.9 | 27 km | 4 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tornado History
74 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF3. Total: 1 fatality, 51 injuries.
| Date | Rating | Distance | Path | Fatalities |
| May 29, 1964 | EF3 | 81 km | 3.0 mi | 1 |
| Jul 31, 1955 | EF3 | 46 km | 0.5 mi | 0 |
| Jul 25, 1996 | EF2 | 74 km | 2.0 mi | 0 |
| Jul 10, 1978 | EF2 | 86 km | 0.3 mi | 0 |
| Jul 10, 1955 | EF2 | 81 km | 0.1 mi | 0 |
| Jun 17, 1953 | EF2 | 95 km | 1.0 mi | 0 |
| May 8, 2017 | EF1 | 83 km | 0.2 mi | 0 |
| Jun 6, 2014 | EF1 | 76 km | 1.4 mi | 0 |
| Jun 6, 2014 | EF1 | 55 km | 8.6 mi | 0 |
| Aug 16, 2008 | EF1 | 81 km | 0.3 mi | 0 |
| Mar 19, 1995 | EF1 | 81 km | 0.1 mi | 0 |
| May 25, 1993 | EF1 | 36 km | 1.0 mi | 0 |
| Aug 17, 1992 | EF1 | 85 km | 0.5 mi | 0 |
| Jun 22, 1983 | EF1 | 90 km | 1.5 mi | 0 |
| Jun 10, 1983 | EF1 | 32 km | 0.5 mi | 0 |
| Jun 10, 1983 | EF1 | 47 km | 0.5 mi | 0 |
| Jun 19, 1982 | EF1 | 99 km | 2.0 mi | 0 |
| May 5, 1980 | EF1 | 57 km | 2.0 mi | 0 |
| Jun 1, 1977 | EF1 | 92 km | 2.0 mi | 0 |
| Jun 16, 1965 | EF1 | 48 km | 0.1 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Wildfire History
20 wildfires (100+ acres) recorded within 100 km. Largest: SPRING CREEK (107,108 acres, 2018).
| Year | Name | Acres Burned | Distance |
| 2018 | SPRING CREEK | 107,108 | 44 km |
| 2002 | PONIL COMPLEX | 89,084 | 53 km |
| 2022 | COOKS PEAK | 61,195 | 98 km |
| 2018 | UTE PARK | 30,177 | 70 km |
| 2011 | TRACK | 28,893 | 59 km |
| 2006 | CASA | 27,452 | 85 km |
| 2002 | SPRING | 24,044 | 17 km |
| 2006 | RIVERA MESA | 16,412 | 100 km |
| 2006 | MATO VEGA | 13,126 | 55 km |
| 2013 | EAST PEAK | 10,082 | 33 km |
| 1996 | HONDO | 8,258 | 76 km |
| 2002 | JAMES AND JOHN | 7,190 | 57 km |
| 2011 | BEAR | 6,585 | 72 km |
| 2011 | PURGATOIRE FIRE | 6,233 | 90 km |
| 2021 | HART CANYON RX FY22 | 5,781 | 44 km |
| 2018 | LOOP ROAD RX | 5,688 | 47 km |
| 2008 | WEST FORK | 5,436 | 37 km |
| 2003 | ENCEBADO | 5,064 | 91 km |
| 2010 | MEDANO | 4,887 | 82 km |
| 1998 | BEARD | 4,553 | 53 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 22°F (-6°C) | 0.9 in | Coldest, Driest |
| February | 24°F (-4°C) | 1.0 in | |
| March | 29°F (-2°C) | 1.7 in | |
| April | 35°F (2°C) | 1.5 in | |
| May | 44°F (7°C) | 2.0 in | |
| June | 53°F (12°C) | 1.8 in | |
| July | 65°F (18°C) | 3.1 in | Warmest |
| August | 56°F (13°C) | 3.2 in | Wettest |
| September | 51°F (10°C) | 1.8 in | |
| October | 42°F (5°C) | 1.5 in | |
| November | 31°F (-1°C) | 1.2 in | |
| December | 24°F (-4°C) | 1.0 in |
Stonewall Gap has a seasonal temperature swing of 43°F / from 22°F in January to 65°F in July. Total annual precipitation is 20.5 inches, with August being the wettest month (3.2") and January the driest (0.9").