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Leyner, Colorado

Community in Boulder County, Colorado

Air quality

The air at Leyner

Index 79, moderate, led by fine particles. Read at 11 PM from its reporting area, Denver-Boulder (CO), 11 miles off.

79Moderate
  • Fine particles (PM2.5)79Moderate7.9 mi
  • Ozone28Good13 ppb6 mi
  • Coarse particles (PM10)19Good8.7 mi
  • Nitrogen dioxide18Good19.4 ppb19.4 mi
  • Sulfur dioxide0Good0.1 ppb16.9 mi
  • Carbon monoxide-0.6 ppm19.5 mi

The days ahead

Good each day through Today, led by fine particles. Yesterday measured 43, good.

Smoke, the next 43 hours

No smoke near the ground through Sat 6 PM.

FriSat

Precipitation

What has fallen at Leyner

0.07 in in the last 24 hours, 0.67 in over the last 3 days, to Thu 11 PM. Measured by radar and rain gauges, as water.

Last 24 hours
0.07in
Last 3 days
0.67in

Visibility

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

Visibility stays 10 miles or more through Sat 6 PM.

FriSat

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

What is measuring near here

The 7 instruments nearest Leyner, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 0.9 miles away.

measured now5 instruments

ErieEIK

At an airfield/4.2 mi away/5,130 ft/99 ft above here

temp, wind, gust, visibility, precip, pressure

Rank1,669of 2,650

I-25 @ SH-7 (40)CO010

Beside a road/7.5 mi away/5,161 ft/130 ft above here

temp, pavement temp, wind, visibility, precip

Rank-

measured daily2 instruments

Erie 2.2 WCO-BO-518

In a volunteer observer's own ground/1.7 mi away/5,146 ft/115 ft above here

precip, snowfall, snow depth

Rank2,386of 2,650

Lafayette 1NLAFC2

At a cooperative observer's station/2.9 mi away/5,279 ft/248 ft above here

snowfall, snow depth, precip, high, low

Rank1,550of 2,650

Station report

The weather at Erie, drawn

The nearest airport reporting now, 4.2 mi from Leyner, Colorado. From its report of Oct 15, 2026, 11:35 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 Erie, 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 EIKFIG. A THE SKY OVER ERIESECTION, 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 MORE0510TITLEErie, the skySTATION REPORT · ASOS EIKTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-EIK-1DRAWN AS linework on paperSOURCES FB-SKY-001

The air

39.6 F with a dew point of 35.0 F, 83 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 1,100 ft up.

Chart of the air at Erie: temperature 39.6 degrees Fahrenheit and dew point 35.0, 83 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 1,100 feet above the station; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT EIKFIG. B THE AIR AT ERIETHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,00020 F30 F40 F50 FSATURATES 1,100 FT ABOVE THE STATION, AT 34.0 FTEMPERATURE 39.6 FDEW POINT 35.0 FSPREAD 4.6 FRELATIVE HUMIDITY 83 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 POINTTITLEErie, the airSTATION REPORT · ASOS EIKTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-EIK-2DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the east (90 degrees) at 6 mph: force 2, a light breeze on the Beaufort scale. The strongest gust today was 28 mph.

Plan of the wind at Erie, north up: blowing from 90 degrees, the east, 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 EIKFIG. C THE WIND AT ERIEPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 90°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE4NOW, 6 MPH3GENTLE BREEZE84MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEErie, the windSTATION REPORT · ASOS EIKTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-EIK-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

The full report of Erie, in 6 sheets, each beside the Field Book plates that explain it

0in

Snow on the ground

Measured at Lafayette 1N (LAFC2), 2.9 miles from here, read 15 Oct, 07:00. measured daily

Elsewhere in Colorado

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

Near Leyner

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

Near Leyner

River and lake gauges