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Sunbury, Pennsylvania

City in Northumberland County, Pennsylvania

Air quality

The air at Sunbury

Index 16, good, led by ozone. Read at 8 PM from its reporting area, Williamsport (PA), 29 miles off.

16Good
  • Fine particles (PM2.5)14Good-
  • Ozone16Good-

The days ahead

Good each day through Tue Oct 20, led by fine particles. Yesterday measured 27, good.

Smoke, the next 42 hours

No smoke near the ground through Sun 2 PM.

SatSun

Precipitation

What has fallen at Sunbury

0.20 in in the last 24 hours, and none in the 2 days before, to Fri 8 PM. Measured by radar and rain gauges, as water.

Last 24 hours
0.20in
Last 3 days
0.20in

Visibility

How far you can see at Sunbury, the next 42 hours

Visibility stays 10 miles or more through Sun 2 PM.

SatSun

On the radar over Sunbury, PennsylvaniaReflectivityStorm topsRain rateRain, last 24 hoursForecast temperatureForecast rain totalEvery picture

What is measuring near here

The 7 instruments nearest Sunbury, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 0.6 miles away.

measured now5 instruments

measured daily2 instruments

Station report

The weather at Selinsgrove, drawn

The nearest airport reporting now, 4.9 mi from Sunbury, Pennsylvania. From its report of Oct 16, 2026, 8:53 PM local time: 3 of its 5 sheets.

The sky

A few clouds at 8,500 ft; visibility 10 mi or more.

Section of the sky over Selinsgrove, height above the station to scale: a few clouds cloud with its base at 8,500 feet, and visibility of 10 mi or more.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT SEGFIG. A THE SKY OVER SELINSGROVESECTION, 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 STATION02,5005,0007,50010,00012,50015,000ETAGESLOWMIDDLETHE STATIONTHE CEILOMETER READS TO 12,000 FTFEW 8,500 FTA FEW CLOUDS, 1 TO 2 EIGHTHS OF THE SKYVISIBILITY, MILES: 10 MI OR MORE0510TITLESelinsgrove, the skySTATION REPORT · ASOS SEGTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 5DATE2026-10-17IDSR-SEG-1DRAWN AS linework on paperSOURCES FB-SKY-001, FB-SKY-013, FB-SKY-014

The air

60.0 F with a dew point of 53.0 F, 78 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 1,600 ft up; the lowest cloud reported is at 8,500 ft.

Chart of the air at Selinsgrove: temperature 60.0 degrees Fahrenheit and dew point 53.0, 78 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 1,600 feet above the station, against the lowest cloud reported at 8,500 feet; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT SEGFIG. B THE AIR AT SELINSGROVETHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,0004,0005,0006,0007,00040 F50 F60 F70 FSATURATES 1,600 FT ABOVE THE STATION, AT 51.4 FABOVE THIS SHEET: LOWEST CLOUD REPORTED, FEW 8,500 FTTEMPERATURE 60.0 FDEW POINT 53.0 FSPREAD 7.0 FRELATIVE HUMIDITY 78 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 POINTTITLESelinsgrove, the airSTATION REPORT · ASOS SEGTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 5DATE2026-10-17IDSR-SEG-2DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The column

At 449 ft above sea level, 2 per cent of the atmosphere's air lies below the station. The standard atmosphere puts the pressure there at 29.44 inHg and the temperature at 57.4 F; the station's altimeter setting of 29.85 inHg means its barometer reads 29.37 inHg; it reports 60.0 F, 2.6 F warmer than standard.

Section from sea level of where Selinsgrove stands in the atmosphere, height to scale: the station 449 feet above sea level with 2 per cent of the air below it; the standard atmosphere's pressure there, 29.44 inches of mercury, and temperature, 57.4 degrees Fahrenheit; the altimeter setting of 29.85 and the station pressure it means, 29.37.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT SEGFIG. D WHERE SELINSGROVE 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 ATMOSPHERESELINSGROVE2 PER CENT OF THE AIR BELOW IT449 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 HERE29.44 inHgSTANDARD TEMPERATURE HERE57.4 FALTIMETER SETTING, REPORTED29.85 inHgITS BAROMETER READS29.37 inHgTEMPERATURE, REPORTED60.0 FTITLESelinsgrove, the columnSTATION REPORT · ASOS SEGTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 3 of 5DATE2026-10-17IDSR-SEG-3DRAWN AS linework on paperSOURCES FB-ENG-001, FB-ENG-003

The full report of Selinsgrove, in 5 sheets, each beside the Field Book plates that explain it

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Snow on the ground

Elsewhere in Pennsylvania

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

Near Sunbury

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

Near Sunbury

River and lake gauges