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Sweet Grass, Montana

Community in Toole County, Montana

Air quality

The air at Sweet Grass

Index 30, good, led by fine particles. Read at 12 AM from its reporting area, Cut Bank (MT), 33 miles off.

30Good
  • Fine particles (PM2.5)30Good-

The days ahead

Yesterday measured 19, good.

Smoke, the next 42 hours

Little smoke near the ground through Sat 6 PM: the index from smoke stays at 33 or under.

FriSat

Precipitation

What has fallen at Sweet Grass

None in the last 3 days, to Fri 12 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 Sweet Grass, the next 42 hours

Visibility stays 10 miles or more through Sat 6 PM.

FriSat

On the radar over Sweet Grass, MontanaReflectivityStorm topsRain rateRain, last 24 hoursForecast temperatureForecast rain totalEvery picture

What is measuring near here

The 6 instruments nearest Sweet Grass, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 2.8 miles away.

measured now4 instruments

ShelbySBX

At an airfield/31.8 mi away/3,428 ft/115 ft below here

temp, wind, gust, visibility, precip, pressure

Rank208of 1,053

measured daily2 instruments

Sunburst 3.4 SEMT-TL-4

In a volunteer observer's own ground/11.9 mi away/3,512 ft/31 ft below here

precip, snowfall, snow depth

Rank-

Gold Butte 7NGNSM8

At a cooperative observer's station/25.7 mi away/3,497 ft/46 ft below here

snowfall, snow depth, precip, high, low

Rank-

Station report

The weather at Shelby, drawn

The nearest airport reporting now, 31.8 mi from Sweet Grass, Montana. From its report of Oct 16, 2026, 12:35 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 Shelby, 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 SBXFIG. A THE SKY OVER SHELBYSECTION, 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 MORE0510TITLEShelby, the skySTATION REPORT · ASOS SBXTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-SBX-1DRAWN AS linework on paperSOURCES FB-SKY-001

The air

35.6 F with a dew point of 33.8 F, 93 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 400 ft up.

Chart of the air at Shelby: temperature 35.6 degrees Fahrenheit and dew point 33.8, 93 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 400 feet above the station; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT SBXFIG. B THE AIR AT SHELBYTHE 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 400 FT ABOVE THE STATION, AT 33.3 FTEMPERATURE AND DEW POINT 35.6 F, 33.8 FRELATIVE HUMIDITY 93 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 POINTTITLEShelby, the airSTATION REPORT · ASOS SBXTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-SBX-2DRAWN AS linework on paperSOURCES FB-WAT-020, FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the southeast (130 degrees) at 10 mph: force 3, a gentle breeze on the Beaufort scale.

Plan of the wind at Shelby, north up: blowing from 130 degrees, the southeast, at 10 miles an hour; beside it the Beaufort scale from calm to hurricane force, force 3, gentle breeze, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT SBXFIG. C THE WIND AT SHELBYPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 130°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE43GENTLE BREEZE8NOW, 10 MPH4MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEShelby, the windSTATION REPORT · ASOS SBXTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-SBX-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

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

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Snow on the ground

Elsewhere in Montana

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

Near Sweet Grass

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

Near Sweet Grass

River and lake gauges