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Niwot, Colorado

Community in Boulder County, Colorado

Air quality

The air at Niwot

Index 22, good, led by ozone. Read at 9 PM from its reporting area, Fort Collins (CO), 28 miles off.

22Good
  • Ozone22Good-

The days ahead

Good each day through Fri Oct 16, led by fine particles. Yesterday measured 37, good.

Smoke, the next 46 hours

No smoke near the ground through Sat 6 PM.

FriSat

Precipitation

What has fallen at Niwot

0.11 in in the last 24 hours, 0.80 in over the last 3 days, to Thu 8 PM. Measured by radar and rain gauges, as water.

Last 24 hours
0.11in
Last 3 days
0.80in

Visibility

How far you can see at Niwot, the next 46 hours

Visibility stays 10 miles or more through Sat 6 PM.

FriSat

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

What is measuring near here

The 7 instruments nearest Niwot, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 0.6 miles away.

measured now5 instruments

measured daily2 instruments

Niwot 0.7 NCO-BO-313

In a volunteer observer's own ground/0.6 mi away/5,079 ft/17 ft below here

precip, snowfall, snow depth

Rank-

Station report

The weather at Longmont/Vbrand, drawn

The nearest airport reporting now, 4.5 mi from Niwot, Colorado. From its report of Oct 15, 2026, 9:15 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 Longmont/Vbrand, 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 LMOFIG. A THE SKY OVER LONGMONT/VBRANDSECTION, 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 MORE0510TITLELongmont/Vbrand, the skySTATION REPORT · ASOS LMOTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-LMO-1DRAWN AS linework on paperSOURCES FB-SKY-001

The air

41.0 F with a dew point of 34.7 F, 78 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 1,400 ft up.

Chart of the air at Longmont/Vbrand: temperature 41.0 degrees Fahrenheit and dew point 34.7, 78 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 1,400 feet above the station; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT LMOFIG. B THE AIR AT LONGMONT/VBRANDTHE 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 1,400 FT ABOVE THE STATION, AT 33.3 FTEMPERATURE 41.0 FDEW POINT 34.7 FSPREAD 6.3 FRELATIVE HUMIDITY 78 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 POINTTITLELongmont/Vbrand, the airSTATION REPORT · ASOS LMOTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-LMO-2DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

Calm.

Plan of the wind at Longmont/Vbrand, north up: calm; beside it the Beaufort scale from calm to hurricane force, force 0, calm, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT LMOFIG. C THE WIND AT LONGMONT/VBRANDPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONCALMBEAUFORT FORCELEAST WIND, MPH0CALM0NOW, 0 MPH1LIGHT AIR12LIGHT BREEZE43GENTLE BREEZE84MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLELongmont/Vbrand, the windSTATION REPORT · ASOS LMOTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-LMO-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

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

0in

Snow on the ground

Measured at Longmont Profiler (LONC2), 4.3 miles from here, read 15 Oct, 07:15. measured daily

Elsewhere in Colorado

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

Near Niwot

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

Near Niwot

River and lake gauges