All Countries
Weather & Climate in Four Square Mile, CO
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Four Square Mile experiences four distinct seasons with an average annual temperature of 51°F (10°C). Winters average 32°F in January while summers reach 73°F in July. The area gets 297 sunny days per year, well above the U.S. average of 205 / making it one of the sunnier locations in the country. Air quality is rated Good with a median AQI of 41. The city sits at an elevation of 5,440 feet.
Temperature
32°F Jan (0°C)
73°F Jul (23°C)
| Annual Average | 50.8°F |
| 6% below US avg | |
| January Average | 32°F (0°C) |
| July Average | 73°F (23°C) |
| Sunny Days | 297 days/yr |
Geography
| Elevation | 5,440 ft (1,658 m) |
| Area | 2.7 sq mi (7.0 km²) |
| Population Density | 8,070/sq mi |
| Coordinates | 39.6807°N, 104.8879°W |
| Timezone | America/Denver |
| County | Denver County County |
| Nearest Airport | Denver International (DEN) 17 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
17 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 | 44 km | 10 km |
| Dec 23, 1995 | 7 km WNW of Rock Creek Park, Colorado | M3.5 | 106 km | 5 km |
| Jan 18, 1997 | 8 km SE of Westcreek, Colorado | M3.3 | 67 km | 5 km |
| Jun 1, 2014 | 9 km NNW of Kersey, Colorado | M3.2 | 91 km | 1 km |
| Jan 26, 2008 | 12 km NE of Cotopaxi, Colorado | M3.1 | 150 km | 5 km |
| Jul 22, 2001 | 6 km WNW of Woodland Park, Colorado | M3.1 | 76 km | 5 km |
| Sep 12, 1990 | 13 km NW of Silverthorne, Colorado | M3.0 | 113 km | 5 km |
| Feb 26, 2008 | 29 km WNW of Westcreek, Colorado | M2.9 | 67 km | 2 km |
| Jan 19, 1997 | 8 km SE of Westcreek, Colorado | M2.9 | 67 km | 5 km |
| Mar 30, 2019 | 7 km NE of Greeley, Colorado | M2.9 | 90 km | 6 km |
| Dec 31, 1995 | 6 km WNW of Rock Creek Park, Colorado | M2.8 | 107 km | 5 km |
| Apr 18, 1998 | 8 km SE of Westcreek, Colorado | M2.7 | 67 km | 5 km |
| Jun 13, 2025 | 7 km SE of Erie, Colorado | M2.7 | 37 km | 9 km |
| Jan 19, 1997 | 8 km SE of Westcreek, Colorado | M2.7 | 67 km | 5 km |
| Aug 23, 2016 | 2 km SSE of Eaton, Colorado | M2.6 | 93 km | 10 km |
| Jun 26, 2021 | 19 km WNW of Cañon City, Colorado | M2.5 | 138 km | 8 km |
| Jun 23, 2014 | 6 km NNE of Kersey, Colorado | M2.5 | 90 km | 5 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tornado History
751 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF3. Total: 1 fatality, 163 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Jun 4, 2015 | EF3 | 65 km | 6.7 mi | 0 |
| May 22, 2008 | EF3 | 62 km | 38.7 mi | 1 |
| Jun 15, 1988 | EF3 | 7 km | 2.5 mi | 0 |
| Jun 12, 1982 | EF3 | 34 km | 3.0 mi | 0 |
| Jun 24, 1979 | EF3 | 92 km | 4.3 mi | 0 |
| Jun 13, 1977 | EF3 | 84 km | 4.9 mi | 0 |
| May 18, 1975 | EF3 | 19 km | 4.1 mi | 0 |
| May 15, 1952 | EF3 | 77 km | 7.4 mi | 0 |
| Jun 7, 2021 | EF2 | 51 km | 7.5 mi | 0 |
| May 7, 2016 | EF2 | 87 km | 8.8 mi | 0 |
| Jun 8, 2014 | EF2 | 92 km | 6.0 mi | 0 |
| Jun 7, 2012 | EF2 | 80 km | 7.5 mi | 0 |
| Jun 15, 2009 | EF2 | 54 km | 4.0 mi | 0 |
| May 10, 2004 | EF2 | 85 km | 6.0 mi | 0 |
| Jul 31, 1996 | EF2 | 91 km | 5.0 mi | 0 |
| Jul 13, 1996 | EF2 | 44 km | 12.0 mi | 0 |
| Jun 15, 1988 | EF2 | 7 km | 0.5 mi | 0 |
| Jun 5, 1988 | EF2 | 34 km | 0.5 mi | 0 |
| Jun 5, 1988 | EF2 | 36 km | 2.0 mi | 0 |
| Jul 7, 1987 | EF2 | 91 km | 5.0 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 | 62 km |
| 2012 | WALDO CANYON | 20,112 | 84 km |
| 2020 | WILLIAMS FORK | 14,679 | 95 km |
| 2013 | BLACK FOREST | 11,885 | 73 km |
| 1996 | BUFFALO CREEK | 11,690 | 46 km |
| 2000 | BOBCAT | 10,444 | 95 km |
| 2020 | CALWOOD | 9,836 | 65 km |
| 2000 | HIGH MEADOWS | 9,607 | 51 km |
| 2001 | MVD PSFRXASST 4 | 7,375 | 55 km |
| 2021 | MARSHALL | 6,286 | 40 km |
| 2010 | FOURMILE CANYON | 5,865 | 59 km |
| 2002 | BIG ELK | 4,348 | 81 km |
| 2021 | BIJOU | 3,485 | 96 km |
| 2012 | LOWER NORTH FORK FIRE | 3,436 | 37 km |
| 2003 | OVERLAND | 3,232 | 64 km |
| 2009 | OLD STAGE | 3,160 | 57 km |
| 2002 | SCHOONOVER | 2,821 | 57 km |
| 2020 | SUNDAY FIRE | 2,204 | 60 km |
| 2002 | SNAKING | 2,080 | 60 km |
| 2023 | 403 | 1,767 | 97 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 32°F (0°C) | 0.5 in | Driest |
| February | 35°F (2°C) | 0.5 in | |
| March | 41°F (5°C) | 1.4 in | |
| April | 48°F (9°C) | 2.0 in | |
| May | 58°F (14°C) | 2.5 in | Wettest |
| June | 68°F (20°C) | 1.8 in | |
| July | 73°F (23°C) | 2.0 in | Warmest |
| August | 72°F (22°C) | 1.7 in | |
| September | 63°F (17°C) | 1.3 in | |
| October | 51°F (11°C) | 1.1 in | |
| November | 39°F (4°C) | 1.0 in | |
| December | 32°F (-0°C) | 0.6 in | Coldest |
Four Square Mile has a seasonal temperature swing of 42°F / from 32°F in December to 73°F in July. Total annual precipitation is 16.4 inches, with May being the wettest month (2.5") and January the driest (0.5").