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Hot Sulphur Springs, Colorado

Town in Grand County, Colorado

Air quality

The air at Hot Sulphur Springs

Index 16, good, led by fine particles. Read at 8 AM from its reporting area, Steamboat Springs (CO), 48 miles off.

16Good
  • Fine particles (PM2.5)16Good-
  • Coarse particles (PM10)6Good-

The days ahead

Good each day through Mon Oct 19, led by fine particles. Yesterday measured 22, good.

Smoke, the next 46 hours

No smoke near the ground through Tue 6 AM.

SunMonTue

Precipitation

What has fallen at Hot Sulphur Springs

None in the last 3 days, to Sun 8 AM. Measured by radar and rain gauges, as water.

Last 24 hours
0.00in
Last 3 days
0.00in

Visibility

How far you can see at Hot Sulphur Springs, the next 46 hours

Visibility stays 3 miles or more through Tue 6 AM, lowest 4 miles Mon 7 PM.

SunMonTue

On the radar over Hot Sulphur Springs, ColoradoReflectivityStorm topsRain rateRain, last 24 hoursForecast temperatureForecast rain totalEvery picture

What is measuring near here

The 7 instruments nearest Hot Sulphur Springs, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 0.2 miles away.

measured now5 instruments

GranbyGNB

At an airfield/10.1 mi away/8,208 ft/482 ft above here

temp, wind, gust, visibility, precip, pressure

Rank1,691of 2,686

measured daily2 instruments

Hot Sulphur Springs .18 ESECO-GR-15

In a volunteer observer's own ground/0.2 mi away/7,766 ft/40 ft above here

precip, snowfall, snow depth

Rank-

Station report

The weather at Granby, drawn

The nearest airport reporting now, 10.1 mi from Hot Sulphur Springs, Colorado. From its report of Oct 18, 2026, 8:55 AM 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 Granby, 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 GNBFIG. A THE SKY OVER GRANBYSECTION, 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 MORE0510TITLEGranby, the skySTATION REPORT · ASOS GNBTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-18IDSR-GNB-1DRAWN AS linework on paperSOURCES FB-SKY-001

The air

31.5 F with a dew point of 18.5 F, 58 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 2,900 ft up.

Chart of the air at Granby: temperature 31.5 degrees Fahrenheit and dew point 18.5, 58 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 2,900 feet above the station; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT GNBFIG. B THE AIR AT GRANBYTHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,0004,0000 F10 F20 F30 F40 FSATURATES 2,900 FT ABOVE THE STATION, AT 15.8 FTEMPERATURE 31.5 FDEW POINT 18.5 FSPREAD 13.0 FRELATIVE HUMIDITY 58 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 POINTTITLEGranby, the airSTATION REPORT · ASOS GNBTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-18IDSR-GNB-2DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

Calm.

Plan of the wind at Granby, 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 GNBFIG. C THE WIND AT GRANBYPLAN, 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 FORCE73TITLEGranby, the windSTATION REPORT · ASOS GNBTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-18IDSR-GNB-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

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

0in

Snow on the ground

Measured at Williams Fork Dam (WIFC2), 5.9 miles from here, read 18 Oct, 07:00. measured daily

Elsewhere in Colorado

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

Near Hot Sulphur Springs

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

Near Hot Sulphur Springs

River and lake gauges