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Weather & Climate in Aetna Estates, CO
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Aetna Estates experiences four distinct seasons with an average annual temperature of 51°F (11°C). Winters average 32°F in January while summers reach 75°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 14.5 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 5,613 feet.
Temperature
32°F Jan (-0°C)
75°F Jul (24°C)
| Annual Average | 51.2°F |
| 5% below US avg | |
| January Average | 32°F (-0°C) |
| July Average | 75°F (24°C) |
| Sunny Days | 330 days/yr |
Geography
| Elevation | 5,613 ft (1,711 m) |
| Area | 0.1 sq mi (0.3 km²) |
| Population Density | 9,054/sq mi |
| Coordinates | 39.7381°N, 104.6732°W |
| Timezone | America/Denver |
| County | Denver County County |
| Nearest Airport | Denver International (DEN) 9 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 41.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively High |
| Risk Score | 95.2 / 100 |
| Social Vulnerability | 17.8 / 100 |
| Community Resilience | 68.5 / 100 |
Hazard Breakdown
| Tornado | Relatively High |
| Earthquake | Relatively Moderate |
| Wildfire | Very Low |
| Flood | Relatively High |
| Hail | Very High |
| Strong Wind | Relatively High |
| Heat Wave | Relatively Low |
| Winter Weather | Relatively High |
| Lightning | Very High |
| Ice Storm | Very Low |
| Drought | Very Low |
| Cold Wave | Relatively High |
| Landslide | Relatively Moderate |
| Volcano | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
15 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.0.
| Dec 25, 1994 | 9 km NE of Larkspur, Colorado | M4.0 | 51 km | 10 km |
| Dec 23, 1995 | 7 km WNW of Rock Creek Park, Colorado | M3.5 | 114 km | 5 km |
| Jan 18, 1997 | 8 km SE of Westcreek, Colorado | M3.3 | 80 km | 5 km |
| Jun 1, 2014 | 9 km NNW of Kersey, Colorado | M3.2 | 81 km | 1 km |
| Jul 22, 2001 | 6 km WNW of Woodland Park, Colorado | M3.1 | 89 km | 5 km |
| Sep 12, 1990 | 13 km NW of Silverthorne, Colorado | M3.0 | 131 km | 5 km |
| Feb 26, 2008 | 29 km WNW of Westcreek, Colorado | M2.9 | 86 km | 2 km |
| Jan 19, 1997 | 8 km SE of Westcreek, Colorado | M2.9 | 80 km | 5 km |
| Mar 30, 2019 | 7 km NE of Greeley, Colorado | M2.9 | 81 km | 6 km |
| Dec 31, 1995 | 6 km WNW of Rock Creek Park, Colorado | M2.8 | 116 km | 5 km |
| Jan 19, 1997 | 8 km SE of Westcreek, Colorado | M2.7 | 80 km | 5 km |
| Apr 18, 1998 | 8 km SE of Westcreek, Colorado | M2.7 | 80 km | 5 km |
| Jun 13, 2025 | 7 km SE of Erie, Colorado | M2.7 | 40 km | 9 km |
| Aug 23, 2016 | 2 km SSE of Eaton, Colorado | M2.6 | 85 km | 10 km |
| Jun 23, 2014 | 6 km NNE of Kersey, Colorado | M2.5 | 79 km | 5 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tornado History
879 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF3. Total: 1 fatality, 161 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Jun 4, 2015 | EF3 | 67 km | 6.7 mi | 0 |
| May 22, 2008 | EF3 | 55 km | 38.7 mi | 1 |
| Jun 6, 1990 | EF3 | 96 km | 7.0 mi | 0 |
| Jun 15, 1988 | EF3 | 22 km | 2.5 mi | 0 |
| Jun 12, 1982 | EF3 | 15 km | 3.0 mi | 0 |
| Jun 13, 1977 | EF3 | 95 km | 4.9 mi | 0 |
| May 18, 1975 | EF3 | 8 km | 4.1 mi | 0 |
| May 15, 1952 | EF3 | 66 km | 7.4 mi | 0 |
| Jun 7, 2021 | EF2 | 49 km | 7.5 mi | 0 |
| May 7, 2016 | EF2 | 70 km | 8.8 mi | 0 |
| Jun 7, 2012 | EF2 | 72 km | 7.5 mi | 0 |
| Jun 15, 2009 | EF2 | 56 km | 4.0 mi | 0 |
| May 10, 2004 | EF2 | 74 km | 6.0 mi | 0 |
| Jul 31, 1996 | EF2 | 80 km | 5.0 mi | 0 |
| Jul 30, 1996 | EF2 | 91 km | 0.5 mi | 0 |
| Jul 13, 1996 | EF2 | 24 km | 12.0 mi | 0 |
| May 30, 1996 | EF2 | 86 km | 1.0 mi | 0 |
| Jun 14, 1990 | EF2 | 96 km | 7.0 mi | 0 |
| Jun 15, 1988 | EF2 | 22 km | 0.5 mi | 0 |
| Jun 5, 1988 | EF2 | 41 km | 0.5 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Wildfire History
20 wildfires (100+ acres) recorded within 100 km. Largest: HAYMAN (129,417 acres, 2002).
| Year | Name | Acres Burned | Distance |
| 2002 | HAYMAN | 129,417 | 78 km |
| 2012 | WALDO CANYON | 20,112 | 93 km |
| 2012 | LAST CHANCE | 17,958 | 91 km |
| 2013 | BLACK FOREST | 11,885 | 77 km |
| 1996 | BUFFALO CREEK | 11,690 | 64 km |
| 2000 | BOBCAT | 10,444 | 98 km |
| 2020 | CALWOOD | 9,836 | 72 km |
| 2000 | HIGH MEADOWS | 9,607 | 70 km |
| 2001 | MVD PSFRXASST 4 | 7,375 | 70 km |
| 2021 | MARSHALL | 6,286 | 50 km |
| 2010 | FOURMILE CANYON | 5,865 | 70 km |
| 2002 | BIG ELK | 4,348 | 88 km |
| 2021 | BIJOU | 3,485 | 78 km |
| 2012 | LOWER NORTH FORK FIRE | 3,436 | 55 km |
| 2003 | OVERLAND | 3,232 | 73 km |
| 2009 | OLD STAGE | 3,160 | 65 km |
| 2002 | SCHOONOVER | 2,821 | 73 km |
| 2020 | SUNDAY FIRE | 2,204 | 49 km |
| 2002 | SNAKING | 2,080 | 80 km |
| 2011 | INDIAN GULCH FIRE | 1,640 | 51 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 32°F (-0°C) | 0.4 in | Driest |
| February | 34°F (1°C) | 0.4 in | |
| March | 40°F (4°C) | 1.2 in | |
| April | 47°F (8°C) | 1.8 in | |
| May | 57°F (14°C) | 2.4 in | Wettest |
| June | 67°F (19°C) | 1.9 in | |
| July | 75°F (24°C) | 2.1 in | Warmest |
| August | 71°F (22°C) | 1.7 in | |
| September | 62°F (17°C) | 1.3 in | |
| October | 51°F (10°C) | 1.0 in | |
| November | 38°F (3°C) | 0.9 in | |
| December | 31°F (-1°C) | 0.6 in | Coldest |
Aetna Estates has a seasonal temperature swing of 45°F / from 31°F in December to 75°F in July. Total annual precipitation is 15.7 inches, with May being the wettest month (2.4") and January the driest (0.4").