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Cortez, Colorado

City in Montezuma County, Colorado

Air quality

The air at Cortez

Index 14, good, led by ozone. Read at 12 AM from its reporting area, Four Corners Area (CO), 5 miles off.

14Good
  • Fine particles (PM2.5)6Good-
  • Ozone14Good13 ppb0.4 mi
  • Coarse particles (PM10)3Good-

The days ahead

Good each day through Today, led by ozone. Yesterday measured 44, good.

Smoke, the next 43 hours

Little smoke near the ground through Sat 6 PM: the index from smoke stays at 6 or under.

FriSat

Precipitation

What has fallen at Cortez

None in the last 24 hours; 0.86 in over the last 3 days, to Thu 11 PM. Measured by radar and rain gauges, as water.

Last 24 hours
0.00in
Last 3 days
0.86in

Visibility

How far you can see at Cortez, the next 43 hours

Visibility stays 10 miles or more through Sat 6 PM.

FriSat

On the radar over Cortez, ColoradoReflectivityStorm topsRain rateRain, last 24 hoursForecast temperatureForecast rain totalEvery picture

What is measuring near here

The 7 instruments nearest Cortez, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 0.3 miles away.

measured now5 instruments

measured daily2 instruments

Cortez 0.5 SSWCO-MZ-63

In a volunteer observer's own ground/0.3 mi away/6,169 ft/22 ft below here

precip, snowfall, snow depth

Rank-

CortezCTZC2

At a cooperative observer's station/0.8 mi away/6,166 ft/25 ft below here

snowfall, snow depth, precip, high, low

Rank200of 2,650

Station report

The weather at Cortez/Montezuma Co, drawn

The nearest airport reporting now, 4.1 mi from Cortez, Colorado. From its report of Oct 15, 2026, 11:53 PM local time: 3 of its 6 sheets.

The sky

No cloud below 12,000 ft; visibility 10 mi or more.

Section of the sky over Cortez/Montezuma Co, height above the station to scale: no cloud detected below 12,000 feet, the reach of its ceilometer, and visibility of 10 mi or more.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT CEZFIG. A THE SKY OVER CORTEZ/MONTEZUMA COSECTION, 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 STATION05001,0001,5002,0002,5003,000ETAGESLOWTHE STATIONTHE CEILOMETER READS TO 12,000 FT, ABOVE THIS SHEETNO CLOUD DETECTED BELOW 12,000 FTVISIBILITY, MILES: 10 MI OR MORE0510TITLECortez/Montezuma Co, the skySTATION REPORT · ASOS CEZTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-CEZ-1DRAWN AS linework on paperSOURCES FB-SKY-001

The air

42.0 F with a dew point of 39.0 F, 89 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 700 ft up.

Chart of the air at Cortez/Montezuma Co: temperature 42.0 degrees Fahrenheit and dew point 39.0, 89 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 700 feet above the station; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT CEZFIG. B THE AIR AT CORTEZ/MONTEZUMA COTHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,00030 F40 F50 FSATURATES 700 FT ABOVE THE STATION, AT 38.3 FTEMPERATURE 42.0 FDEW POINT 39.0 FSPREAD 3.0 FRELATIVE HUMIDITY 89 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 POINTTITLECortez/Montezuma Co, the airSTATION REPORT · ASOS CEZTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-CEZ-2DRAWN AS linework on paperSOURCES FB-WAT-020, FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the northeast (50 degrees) at 5 mph: force 2, a light breeze on the Beaufort scale. The strongest gust today was 16 mph.

Plan of the wind at Cortez/Montezuma Co, north up: blowing from 50 degrees, the northeast, at 5 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 CEZFIG. C THE WIND AT CORTEZ/MONTEZUMA COPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 50°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE4NOW, 5 MPH3GENTLE BREEZE84MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLECortez/Montezuma Co, the windSTATION REPORT · ASOS CEZTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-CEZ-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

The full report of Cortez/Montezuma Co, 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 Cortez

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

Near Cortez

River and lake gauges