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St. James, New York

Community in Suffolk County, New York

Air quality

The air at St. James

Index 27, good, led by fine particles. Read at 12 PM from its reporting area, Bridgeport (CT), 21 miles off.

27Good
  • Fine particles (PM2.5)27Good6 mi
  • Ozone-23 ppb6 mi
  • Coarse particles (PM10)13Good20.3 mi
  • Nitrogen dioxide3Good3 ppb19.2 mi
  • Sulfur dioxide0Good0 ppb20.3 mi

The days ahead

Good each day through Mon Oct 19, led by fine particles. Yesterday measured 11, good.

Smoke, the next 45 hours

No smoke near the ground through Sun 8 AM.

FriSatSun

Precipitation

What has fallen at St. James

0.26 in in the last 24 hours, and none in the 2 days before, to Fri 11 AM. Measured by radar and rain gauges, as water.

Last 24 hours
0.26in
Last 3 days
0.26in

Visibility

How far you can see at St. James, the next 45 hours

Fog: visibility falls to 0.8 miles Fri 8 PM, under a mile for 1 hour.

FriSatSun

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

What is measuring near here

The 6 instruments nearest St. James, 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 now4 instruments

measured daily2 instruments

St. James 0.8 NNY-SF-12

In a volunteer observer's own ground/0.8 mi away/151 ft/8 ft above here

precip, snowfall, snow depth

Rank-

St JamesSTJN6

At a cooperative observer's station/1.0 mi away/128 ft/15 ft below here

snowfall, snow depth, precip, high, low

Rank-

Station report

The weather at Islip/Macarthur, drawn

The nearest airport reporting now, 6.3 mi from St. James, New York. From its report of Oct 16, 2026, 11:56 AM local time: 3 of its 6 sheets.

The sky

Overcast at 300 ft; the ceiling is 300 ft; visibility 3 mi.

Section of the sky over Islip/Macarthur, height above the station to scale: overcast cloud with its base at 300 feet, the ceiling at 300 feet, and visibility of 3 mi.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT ISPFIG. A THE SKY OVER ISLIP/MACARTHURSECTION, 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 300 FTOVERCAST, 8 EIGHTHS OF THE SKYCEILING 300 FTVISIBILITY, MILES: 3 MI0510TITLEIslip/Macarthur, the skySTATION REPORT · ASOS ISPTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-ISP-1DRAWN AS linework on paperSOURCES FB-SKY-001, FB-SKY-017, FB-SKY-016, FB-SKY-018

The air

66.0 F with a dew point of 65.0 F, 97 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 200 ft up; the lowest cloud reported is at 300 ft.

Chart of the air at Islip/Macarthur: temperature 66.0 degrees Fahrenheit and dew point 65.0, 97 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 200 feet above the station, against the lowest cloud reported at 300 feet; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT ISPFIG. B THE AIR AT ISLIP/MACARTHURTHE 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 200 FT ABOVE THE STATION, AT 64.7 FLOWEST CLOUD REPORTED, OVC 300 FTTEMPERATURE AND DEW POINT 66.0 F, 65.0 FRELATIVE HUMIDITY 97 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 POINTTITLEIslip/Macarthur, the airSTATION REPORT · ASOS ISPTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-ISP-2DRAWN AS linework on paperSOURCES FB-WAT-020, FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the south southwest (210 degrees) at 12 mph: force 3, a gentle breeze on the Beaufort scale. The strongest gust today was 20 mph.

Plan of the wind at Islip/Macarthur, north up: blowing from 210 degrees, the south southwest, at 12 miles an hour; beside it the Beaufort scale from calm to hurricane force, force 3, gentle breeze, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT ISPFIG. C THE WIND AT ISLIP/MACARTHURPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 210°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE43GENTLE BREEZE8NOW, 12 MPH4MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEIslip/Macarthur, the windSTATION REPORT · ASOS ISPTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-ISP-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

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

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Snow on the ground

Elsewhere in New York

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

Near St. James

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

Near St. James

River and lake gauges