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Katonah, New York

Community in Westchester County, New York

Air quality

The air at Katonah

Index 17, good, led by fine particles. Read at 2 PM from its reporting area, Danbury (CT), 16 miles off.

17Good
  • Fine particles (PM2.5)17Good14.9 mi
  • Ozone-20 ppb13.6 mi
  • Coarse particles (PM10)6Good16 mi
  • Nitrogen dioxide3Good3.9 ppb20.8 mi

The days ahead

Good each day through Mon Oct 19, led by fine particles. Yesterday measured 12, good.

Smoke, the next 43 hours

No smoke near the ground through Sun 8 AM.

FriSatSun

Precipitation

What has fallen at Katonah

0.46 in in the last 24 hours, and none in the 2 days before, to Fri 1 PM. Measured by radar and rain gauges, as water.

Last 24 hours
0.46in
Last 3 days
0.46in

Visibility

How far you can see at Katonah, the next 43 hours

Visibility stays 5 miles or more through Sun 8 AM, lowest 6 miles Fri 7 PM.

FriSatSun

On the radar over Katonah, New YorkReflectivityStorm topsRain rateRain, last 24 hoursForecast temperatureForecast rain totalEvery picture

What is measuring near here

The 7 instruments nearest Katonah, 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

SchodackNY003

Beside a road/33.1 mi away/328 ft/101 ft below here

temp, pavement temp, wind, visibility, precip

Rank1,057of 1,432

measured daily2 instruments

Katonah 0.4 SSWNY-WC-23

In a volunteer observer's own ground/0.3 mi away/307 ft/122 ft below here

precip, snowfall, snow depth

Rank-

Shrub OakOAKN6

At a cooperative observer's station/9.3 mi away/428 ft/1 ft below here

snowfall, snow depth, precip, high, low

Rank22of 1,432

Station report

The weather at White Plains, drawn

The nearest airport reporting now, 13.2 mi from Katonah, New York. From its report of Oct 16, 2026, 1:56 PM local time: 3 of its 6 sheets.

The sky

Overcast at 900 ft; the ceiling is 900 ft; visibility 10 mi or more.

Section of the sky over White Plains, height above the station to scale: overcast cloud with its base at 900 feet, the ceiling at 900 feet, and visibility of 10 mi or more.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT HPNFIG. A THE SKY OVER WHITE PLAINSSECTION, 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 SHEETOVC 900 FTOVERCAST, 8 EIGHTHS OF THE SKYCEILING 900 FTVISIBILITY, MILES: 10 MI OR MORE0510TITLEWhite Plains, the skySTATION REPORT · ASOS HPNTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-HPN-1DRAWN AS linework on paperSOURCES FB-SKY-001, FB-SKY-017, FB-SKY-016, FB-SKY-018

The air

67.0 F with a dew point of 64.0 F, 90 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 700 ft up; the lowest cloud reported is at 900 ft.

Chart of the air at White Plains: temperature 67.0 degrees Fahrenheit and dew point 64.0, 90 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 700 feet above the station, against the lowest cloud reported at 900 feet; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT HPNFIG. B THE AIR AT WHITE PLAINSTHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,00050 F60 F70 F80 FSATURATES 700 FT ABOVE THE STATION, AT 63.2 FLOWEST CLOUD REPORTED, OVC 900 FTTEMPERATURE 67.0 FDEW POINT 64.0 FSPREAD 3.0 FRELATIVE HUMIDITY 90 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 POINTTITLEWhite Plains, the airSTATION REPORT · ASOS HPNTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-HPN-2DRAWN AS linework on paperSOURCES FB-WAT-020, FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

At 3 mph: force 1, a light air on the Beaufort scale. The strongest gust today was 17 mph.

Plan of the wind at White Plains, north up: at 3 miles an hour; beside it the Beaufort scale from calm to hurricane force, force 1, light air, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT HPNFIG. C THE WIND AT WHITE PLAINSPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONDIRECTION NOT REPORTEDBEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR1NOW, 3 MPH2LIGHT BREEZE43GENTLE BREEZE84MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEWhite Plains, the windSTATION REPORT · ASOS HPNTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-HPN-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

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

0in

Snow on the ground

Measured at Shrub Oak (OAKN6), 9.3 miles from here, read 16 Oct, 07:00. measured daily

Elsewhere in New York

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

Near Katonah

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

Near Katonah

River and lake gauges