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Monmouth, Oregon

City in Polk County, Oregon

Air quality

The air at Monmouth

Index 20, good, led by fine particles. Read at 9 PM from its reporting area, Dallas (OR), 7 miles off.

20Good
  • Fine particles (PM2.5)20Good12.7 mi

Smoke, the next 44 hours

Little smoke near the ground through Sat 5 PM: the index from smoke stays at 17 or under.

FriSat

Precipitation

What has fallen at Monmouth

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 Monmouth, the next 44 hours

Visibility stays 7 miles or more through Sat 5 PM, lowest 8 miles Sat 5 AM.

FriSat

On the radar over Monmouth, OregonReflectivityStorm topsRain rateRain, last 24 hoursForecast temperatureForecast rain totalEvery picture

What is measuring near here

The 7 instruments nearest Monmouth, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 0.3 miles away.

measured now5 instruments

measured daily2 instruments

Monmouth 0.4 SOR-PK-17

In a volunteer observer's own ground/0.3 mi away/190 ft/13 ft below here

precip, snowfall, snow depth

Rank-

Dallas 2NeDASO3

At a cooperative observer's station/7.3 mi away/305 ft/102 ft above here

snowfall, snow depth, precip, high, low

Rank-

Station report

The weather at Salem/Mcnary, drawn

The nearest airport reporting now, 11.9 mi from Monmouth, Oregon. From its report of Oct 15, 2026, 8:56 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 Salem/Mcnary, 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 SLEFIG. A THE SKY OVER SALEM/MCNARYSECTION, 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 MORE0510TITLESalem/Mcnary, the skySTATION REPORT · ASOS SLETYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-SLE-1DRAWN AS linework on paperSOURCES FB-SKY-001

The air

65.0 F with a dew point of 42.0 F, 43 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 5,200 ft up.

Chart of the air at Salem/Mcnary: temperature 65.0 degrees Fahrenheit and dew point 42.0, 43 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 5,200 feet above the station; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT SLEFIG. B THE AIR AT SALEM/MCNARYTHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,0004,0005,0006,0007,00030 F40 F50 F60 F70 F80 FSATURATES 5,200 FT ABOVE THE STATION, AT 37.0 FTEMPERATURE 65.0 FDEW POINT 42.0 FSPREAD 23.0 FRELATIVE HUMIDITY 43 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 POINTTITLESalem/Mcnary, the airSTATION REPORT · ASOS SLETYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-SLE-2DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the northwest (310 degrees) at 5 mph: force 2, a light breeze on the Beaufort scale.

Plan of the wind at Salem/Mcnary, north up: blowing from 310 degrees, the northwest, at 5 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 SLEFIG. C THE WIND AT SALEM/MCNARYPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 310°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE4NOW, 5 MPH3GENTLE BREEZE84MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLESalem/Mcnary, the windSTATION REPORT · ASOS SLETYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-SLE-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

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

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Snow on the ground

Elsewhere in Oregon

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

Near Monmouth

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

Near Monmouth

River and lake gauges