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Square Butte, Montana

Community in Chouteau County, Montana

Air quality

The air at Square Butte

Index 27, good, led by ozone. Read at 10 PM from its reporting area, Lewistown (MT), 47 miles off.

27Good
  • Fine particles (PM2.5)23Good-
  • Ozone27Good-
  • Coarse particles (PM10)6Good-

The days ahead

Yesterday measured 35, good.

Smoke, the next 44 hours

Little smoke near the ground through Sat 6 PM: the index from smoke stays at 11 or under.

FriSat

Precipitation

What has fallen at Square Butte

None in the last 3 days, to Thu 9 PM. 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 Square Butte, the next 44 hours

Visibility stays 10 miles or more through Sat 6 PM.

FriSat

On the radar over Square Butte, MontanaReflectivityStorm topsRain rateRain, last 24 hoursForecast temperatureForecast rain totalEvery picture

What is measuring near here

The 7 instruments nearest Square Butte, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 10.6 miles away.

measured now5 instruments

MoccasinS2119

At a soil climate station/33.6 mi away/4,256 ft/1,117 ft above here

temp, humidity, soil temp, soil moisture

Rank687of 1,053

measured daily2 instruments

StanfordSTNM8

At a cooperative observer's station/24.9 mi away/4,275 ft/1,136 ft above here

snowfall, snow depth, precip, high, low

Rank574of 1,053

Station report

The weather at Fort Benton, drawn

The nearest airport reporting now, 30.6 mi from Square Butte, Montana. From its report of Oct 15, 2026, 10:55 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 Fort Benton, 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 79SFIG. A THE SKY OVER FORT BENTONSECTION, 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 MORE0510TITLEFort Benton, the skySTATION REPORT · ASOS 79STYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-79S-1DRAWN AS linework on paperSOURCES FB-SKY-001

The air

40.6 F with a dew point of 30.0 F, 66 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 2,400 ft up.

Chart of the air at Fort Benton: temperature 40.6 degrees Fahrenheit and dew point 30.0, 66 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 2,400 feet above the station; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT 79SFIG. B THE AIR AT FORT BENTONTHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,0004,00020 F30 F40 F50 FSATURATES 2,400 FT ABOVE THE STATION, AT 27.7 FTEMPERATURE 40.6 FDEW POINT 30.0 FSPREAD 10.6 FRELATIVE HUMIDITY 66 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 POINTTITLEFort Benton, the airSTATION REPORT · ASOS 79STYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-79S-2DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

At 6 mph: force 2, a light breeze on the Beaufort scale. The strongest gust today was 22 mph.

Plan of the wind at Fort Benton, north up: 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 79SFIG. C THE WIND AT FORT BENTONPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONDIRECTION NOT REPORTEDBEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE4NOW, 6 MPH3GENTLE BREEZE84MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEFort Benton, the windSTATION REPORT · ASOS 79STYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-79S-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

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

0in

Snow on the ground

Measured at Stanford (STNM8), 24.9 miles from here, read 15 Oct, 18:00. measured daily

Elsewhere in Montana

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

Near Square Butte

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

Near Square Butte

River and lake gauges