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Four Square Mile, Colorado

Community in Arapahoe County, Colorado

Air quality

The air at Four Square Mile

Index 31, good, led by ozone. Read at 3 AM from its reporting area, Denver-Boulder (CO), 17 miles off.

31Good
  • Fine particles (PM2.5)25Good4.8 mi
  • Ozone31Good31 ppb7.1 mi
  • Coarse particles (PM10)9Good-
  • Nitrogen dioxide4Good4.8 ppb7.1 mi
  • Sulfur dioxide0Good0.4 ppb7.1 mi
  • Carbon monoxide-0.2 ppm7.6 mi

The days ahead

Good each day through Today, led by fine particles. Yesterday measured 36, good.

Smoke, the next 46 hours

No smoke near the ground through Sun 12 AM.

FriSat

Precipitation

What has fallen at Four Square Mile

0.02 in in the last 24 hours, 0.20 in over the last 3 days, to Fri 2 AM. Measured by radar and rain gauges, as water.

Last 24 hours
0.02in
Last 3 days
0.20in

Visibility

How far you can see at Four Square Mile, the next 46 hours

Visibility stays 10 miles or more through Sun 12 AM.

FriSat

On the radar over Four Square Mile, ColoradoReflectivityStorm topsRain rateRain, last 24 hoursForecast temperatureForecast rain totalEvery picture

What is measuring near here

The 6 instruments nearest Four Square Mile, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 0.5 miles away.

measured now4 instruments

measured daily2 instruments

Englewood #2ENLC2

At a cooperative observer's station/5.8 mi away/5,430 ft/10 ft below here

snowfall, snow depth, precip, high, low

Rank-

Station report

The weather at Buckley ANGB/Denver, drawn

The nearest airport reporting now, 7.5 mi from Four Square Mile, Colorado. From its report of Oct 16, 2026, 1:58 AM local time: 3 of its 6 sheets.

The sky

Broken at 4,000 ft; the ceiling is 4,000 ft; visibility 10 mi or more.

Section of the sky over Buckley ANGB/Denver, height above the station to scale: broken cloud with its base at 4,000 feet, the ceiling at 4,000 feet, and visibility of 10 mi or more.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT BKFFIG. A THE SKY OVER BUCKLEY ANGB/DENVERSECTION, HEIGHT ABOVE THE STATION TO SCALE, EACH LAYER AT THE HEIGHT OF ITS BASE AS REPORTED; COVER IN EIGHTHS OF THE SKY; TOPS NOT MEASUREDFT ABOVE THE STATION01,0002,0003,0004,0005,0006,000ETAGESLOWTHE STATIONBKN 4,000 FTBROKEN, 5 TO 7 EIGHTHS OF THE SKYCEILING 4,000 FTVISIBILITY, MILES: 10 MI OR MORE0510TITLEBuckley ANGB/Denver, the skySTATION REPORT · ASOS BKFTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-BKF-1DRAWN AS linework on paperSOURCES FB-SKY-001, FB-SKY-017, FB-SKY-016, FB-SKY-018

The air

35.0 F with a dew point of 26.4 F, 71 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 1,900 ft up; the lowest cloud reported is at 4,000 ft.

Chart of the air at Buckley ANGB/Denver: temperature 35.0 degrees Fahrenheit and dew point 26.4, 71 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 1,900 feet above the station, against the lowest cloud reported at 4,000 feet; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT BKFFIG. B THE AIR AT BUCKLEY ANGB/DENVERTHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,0004,0005,00010 F20 F30 F40 F50 FSATURATES 1,900 FT ABOVE THE STATION, AT 24.6 FLOWEST CLOUD REPORTED, BKN 4,000 FTTEMPERATURE 35.0 FDEW POINT 26.4 FSPREAD 8.6 FRELATIVE HUMIDITY 71 PER CENTTHE AIR COOLS ABOUT 5.4 F EACH 1,000 FT IT RISES, AND ITS DEW POINT ABOUT 1 FSOLID: THE LIFTED AIR'S TEMPERATURE; DASHED: ITS DEW POINTTITLEBuckley ANGB/Denver, the airSTATION REPORT · ASOS BKFTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-BKF-2DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the north (350 degrees) at 6 mph: force 2, a light breeze on the Beaufort scale.

Plan of the wind at Buckley ANGB/Denver, north up: blowing from 350 degrees, the north, at 6 miles an hour; beside it the Beaufort scale from calm to hurricane force, force 2, light breeze, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT BKFFIG. C THE WIND AT BUCKLEY ANGB/DENVERPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 350°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE4NOW, 6 MPH3GENTLE BREEZE84MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEBuckley ANGB/Denver, the windSTATION REPORT · ASOS BKFTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-BKF-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

The full report of Buckley ANGB/Denver, in 6 sheets, each beside the Field Book plates that explain it

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Snow on the ground

Elsewhere in Colorado

41 places, each with its own forecast and its own instruments.

Near Four Square Mile

The nearest places, each with its own forecast and the instruments nearest it.

Near Four Square Mile

River and lake gauges