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Bynum, Montana

Community in Teton County, Montana

Air quality

The air at Bynum

Index 3, good, led by fine particles. Read at 10 PM from its reporting area, Choteau (MT), 12 miles off.

3Good
  • Fine particles (PM2.5)3Good-

The days ahead

Yesterday measured 18, good.

Smoke, the next 44 hours

Little smoke near the ground through Sat 6 PM: the index from smoke stays at 22 or under.

FriSat

Precipitation

What has fallen at Bynum

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 Bynum, the next 44 hours

Visibility stays 10 miles or more through Sat 6 PM.

FriSat

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

What is measuring near here

The 6 instruments nearest Bynum, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 3.9 miles away.

measured now4 instruments

Conrad Ag RcS2117

At a soil climate station/28.8 mi away/3,706 ft/275 ft below here

temp, humidity, soil temp, soil moisture

Rank669of 1,053

measured daily2 instruments

Bynum 4 SseBYNM8

At a cooperative observer's station/3.9 mi away/4,035 ft/54 ft above here

snowfall, snow depth, precip, high, low

Rank727of 1,053

Station report

The weather at Pendroy US-89 MP 62.6, drawn

The nearest instrument reporting now, 6.5 mi from Bynum, Montana. From its report of Oct 15, 2026, 10:15 PM local time: 3 of its 5 sheets.

The air

35.0 F with a dew point of 28.2 F, 76 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 1,500 ft up.

Chart of the air at Pendroy US-89 MP 62.6: temperature 35.0 degrees Fahrenheit and dew point 28.2, 76 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 1,500 feet above the station; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT MTPNDFIG. B THE AIR AT PENDROY US-89 MP 62.6THE 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 1,500 FT ABOVE THE STATION, AT 26.7 FTEMPERATURE 35.0 FDEW POINT 28.2 FSPREAD 6.8 FRELATIVE HUMIDITY 76 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 POINTTITLEPendroy US-89 MP 62.6, the airSTATION REPORT · RWIS MTPNDTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 5DATE2026-10-16IDSR-MTPND-1DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the south southwest (203 degrees) at 12 mph, gusting 13 mph: force 3, a gentle breeze on the Beaufort scale. The strongest gust today was 28 mph.

Plan of the wind at Pendroy US-89 MP 62.6, north up: blowing from 203 degrees, the south southwest, at 12 miles an hour, gusting 13; beside it the Beaufort scale from calm to hurricane force, force 3, gentle breeze, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT MTPNDFIG. C THE WIND AT PENDROY US-89 MP 62.6PLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 203°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE43GENTLE BREEZE8NOW, 12 MPH4MODERATE BREEZE13GUST, 13 MPH5FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEPendroy US-89 MP 62.6, the windSTATION REPORT · RWIS MTPNDTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 2 of 5DATE2026-10-16IDSR-MTPND-2DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008

The column

At 4,324 ft above sea level, 15 per cent of the atmosphere's air lies below the station. The standard atmosphere puts the pressure there at 25.53 inHg and the temperature at 43.6 F; it reports 35.0 F, 8.6 F colder than standard.

Section from sea level of where Pendroy US-89 MP 62.6 stands in the atmosphere, height to scale: the station 4,324 feet above sea level with 15 per cent of the air below it; the standard atmosphere's pressure there, 25.53 inches of mercury, and temperature, 43.6 degrees Fahrenheit.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT MTPNDFIG. D WHERE PENDROY US-89 MP 62.6 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 ATMOSPHEREPENDROY US-89 MP 62.615 PER CENT OF THE AIR BELOW IT4,324 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 HERE25.53 inHgSTANDARD TEMPERATURE HERE43.6 FTEMPERATURE, REPORTED35.0 FTITLEPendroy US-89 MP 62.6, the columnSTATION REPORT · RWIS MTPNDTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 3 of 5DATE2026-10-16IDSR-MTPND-3DRAWN AS linework on paperSOURCES FB-ENG-001, FB-ENG-003

The full report of Pendroy US-89 MP 62.6, in 5 sheets, each beside the Field Book plates that explain it

0in

Snow on the ground

Measured at Bynum 4 Sse (BYNM8), 3.9 miles from here, read 14 Oct, 06:30. measured daily

Elsewhere in Montana

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

Near Bynum

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

Near Bynum

River and lake gauges