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Castle Valley, Utah

Town in Grand County, Utah

Air quality

The air at Castle Valley

Index 34, good, led by ozone. Read at 3 AM from its reporting area, Canyonlands National Park (UT), 25 miles off.

34Good
  • Ozone34Good-

The days ahead

Yesterday measured 34, good.

Smoke, the next 46 hours

No smoke near the ground through Sun 12 AM.

FriSat

Precipitation

What has fallen at Castle Valley

None in the last 24 hours; 1.30 in over the last 3 days, to Fri 2 AM. Measured by radar and rain gauges, as water.

Last 24 hours
0.00in
Last 3 days
1.30in

Visibility

How far you can see at Castle Valley, the next 46 hours

Visibility stays 10 miles or more through Sun 12 AM.

FriSat

On the radar over Castle Valley, UtahReflectivityStorm topsRain rateRain, last 24 hoursForecast temperatureForecast rain totalEvery picture

What is measuring near here

The 6 instruments nearest Castle Valley, 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 now4 instruments

Harms WayS2166

At a soil climate station/24.1 mi away/7,055 ft/2,269 ft above here

temp, humidity, soil temp, soil moisture

Rank492of 998

measured daily2 instruments

Castle Valley 1SECSEU1

At a cooperative observer's station/1.4 mi away/4,924 ft/138 ft above here

snowfall, snow depth, precip, high, low

Rank-

Station report

The weather at Moab/Canyonlands, drawn

The nearest airport reporting now, 20.2 mi from Castle Valley, Utah. From its report of Oct 16, 2026, 2:53 AM local time: 3 of its 5 sheets.

The sky

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

Section of the sky over Moab/Canyonlands, 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 CNYFIG. A THE SKY OVER MOAB/CANYONLANDSSECTION, 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 MORE0510TITLEMoab/Canyonlands, the skySTATION REPORT · ASOS CNYTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 5DATE2026-10-16IDSR-CNY-1DRAWN AS linework on paperSOURCES FB-SKY-001

The air

50.0 F with a dew point of 29.0 F, 44 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 4,800 ft up.

Chart of the air at Moab/Canyonlands: temperature 50.0 degrees Fahrenheit and dew point 29.0, 44 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 4,800 feet above the station; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT CNYFIG. B THE AIR AT MOAB/CANYONLANDSTHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,0004,0005,0006,00010 F20 F30 F40 F50 F60 FSATURATES 4,800 FT ABOVE THE STATION, AT 24.6 FTEMPERATURE 50.0 FDEW POINT 29.0 FSPREAD 21.0 FRELATIVE HUMIDITY 44 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 POINTTITLEMoab/Canyonlands, the airSTATION REPORT · ASOS CNYTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 5DATE2026-10-16IDSR-CNY-2DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The column

At 4,554 ft above sea level, 15 per cent of the atmosphere's air lies below the station. The standard atmosphere puts the pressure there at 25.31 inHg and the temperature at 42.8 F; the station's altimeter setting of 30.58 inHg means its barometer reads 25.87 inHg; it reports 50.0 F, 7.2 F warmer than standard.

Section from sea level of where Moab/Canyonlands stands in the atmosphere, height to scale: the station 4,554 feet above sea level with 15 per cent of the air below it; the standard atmosphere's pressure there, 25.31 inches of mercury, and temperature, 42.8 degrees Fahrenheit; the altimeter setting of 30.58 and the station pressure it means, 25.87.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT CNYFIG. D WHERE MOAB/CANYONLANDS STANDS IN THE ATMOSPHERESECTION FROM SEA LEVEL, HEIGHT TO SCALE, THE STATION IN THE STANDARD ATMOSPHEREFT ABOVE SEA LEVEL05,00010,00015,000SEA LEVEL, 29.92 inHg IN THE STANDARD ATMOSPHEREMOAB/CANYONLANDS15 PER CENT OF THE AIR BELOW IT4,554 FT10 PER CENT OF THE AIR BELOW, 2,890 FT20 PER CENT OF THE AIR BELOW, 6,050 FT30 PER CENT OF THE AIR BELOW, 9,540 FT40 PER CENT OF THE AIR BELOW, 13,470 FTSTANDARD PRESSURE HERE25.31 inHgSTANDARD TEMPERATURE HERE42.8 FALTIMETER SETTING, REPORTED30.58 inHgITS BAROMETER READS25.87 inHgTEMPERATURE, REPORTED50.0 FTITLEMoab/Canyonlands, the columnSTATION REPORT · ASOS CNYTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 3 of 5DATE2026-10-16IDSR-CNY-3DRAWN AS linework on paperSOURCES FB-ENG-001, FB-ENG-003

The full report of Moab/Canyonlands, in 5 sheets, each beside the Field Book plates that explain it

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Snow on the ground

Elsewhere in Utah

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

Near Castle Valley

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

Near Castle Valley

River and lake gauges