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Deerfield Colony, Montana

Community in Fergus County, Montana

Air quality

The air at Deerfield Colony

Index 27, good, led by ozone. Read at 10 PM from its reporting area, Lewistown (MT), 18 miles off.

27Good
  • Fine particles (PM2.5)23Good18 mi
  • Ozone27Good28 ppb18 mi
  • Coarse particles (PM10)6Good18 mi

The days ahead

Yesterday measured 35, good.

Smoke, the next 45 hours

No smoke near the ground through Sat 6 PM.

FriSat

Precipitation

What has fallen at Deerfield Colony

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 Deerfield Colony, the next 45 hours

Visibility stays 10 miles or more through Sat 6 PM.

FriSat

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

What is measuring near here

The 7 instruments nearest Deerfield Colony, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 8.5 miles away.

measured now5 instruments

Lewistown MunicipalLWT

At an airfield/17.9 mi away/4,167 ft/738 ft above here

temp, wind, gust, visibility, precip, pressure

Rank-

MoccasinS2119

At a soil climate station/19.1 mi away/4,256 ft/827 ft above here

temp, humidity, soil temp, soil moisture

Rank687of 1,053

measured daily2 instruments

Lewistown 2.9 WNWMT-FG-2

In a volunteer observer's own ground/16.0 mi away/4,043 ft/614 ft above here

precip, snowfall, snow depth

Rank-

LewistownLCMM8

At a cooperative observer's station/18.5 mi away/4,032 ft/603 ft above here

snowfall, snow depth, precip, high, low

Rank-

Station report

The weather at East of Denton MT-81 MP 17, drawn

The nearest instrument reporting now, 8.5 mi from Deerfield Colony, Montana. From its report of Oct 15, 2026, 9:45 PM local time: 3 of its 5 sheets.

The air

30.0 F with a dew point of 23.7 F, 77 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 1,400 ft up.

Chart of the air at East of Denton MT-81 MP 17: temperature 30.0 degrees Fahrenheit and dew point 23.7, 77 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 1,400 feet above the station; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT MTDENFIG. B THE AIR AT EAST OF DENTON MT-81 MP 17THE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,00010 F20 F30 F40 FSATURATES 1,400 FT ABOVE THE STATION, AT 22.4 FTEMPERATURE 30.0 FDEW POINT 23.7 FSPREAD 6.3 FRELATIVE HUMIDITY 77 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 POINTTITLEEast of Denton MT-81 MP 17, the airSTATION REPORT · RWIS MTDENTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 5DATE2026-10-16IDSR-MTDEN-1DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the south southeast (158 degrees) at 2 mph, gusting 7 mph: force 1, a light air on the Beaufort scale. The strongest gust today was 25 mph.

Plan of the wind at East of Denton MT-81 MP 17, north up: blowing from 158 degrees, the south southeast, at 2 miles an hour, gusting 7; beside it the Beaufort scale from calm to hurricane force, force 1, light air, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT MTDENFIG. C THE WIND AT EAST OF DENTON MT-81 MP 17PLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 158°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR1NOW, 2 MPH2LIGHT BREEZE4GUST, 7 MPH3GENTLE BREEZE84MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEEast of Denton MT-81 MP 17, the windSTATION REPORT · RWIS MTDENTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 2 of 5DATE2026-10-16IDSR-MTDEN-2DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008

The column

At 3,599 ft above sea level, 12 per cent of the atmosphere's air lies below the station. The standard atmosphere puts the pressure there at 26.23 inHg and the temperature at 46.2 F; it reports 30.0 F, 16.2 F colder than standard.

Section from sea level of where East of Denton MT-81 MP 17 stands in the atmosphere, height to scale: the station 3,599 feet above sea level with 12 per cent of the air below it; the standard atmosphere's pressure there, 26.23 inches of mercury, and temperature, 46.2 degrees Fahrenheit.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT MTDENFIG. D WHERE EAST OF DENTON MT-81 MP 17 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 ATMOSPHEREEAST OF DENTON MT-81 MP 1712 PER CENT OF THE AIR BELOW IT3,599 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 HERE26.23 inHgSTANDARD TEMPERATURE HERE46.2 FTEMPERATURE, REPORTED30.0 FTITLEEast of Denton MT-81 MP 17, the columnSTATION REPORT · RWIS MTDENTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 3 of 5DATE2026-10-16IDSR-MTDEN-3DRAWN AS linework on paperSOURCES FB-ENG-001, FB-ENG-003

The full report of East of Denton MT-81 MP 17, in 5 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 Deerfield Colony

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

Near Deerfield Colony

River and lake gauges