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King William, Virginia

Community in King William County, Virginia

Air quality

The air at King William

Index 44, good, led by fine particles. Read at 8 AM from its reporting area, Richmond (VA), 26 miles off.

44Good
  • Fine particles (PM2.5)44Good22.8 mi
  • Ozone17Good15 ppb12.3 mi
  • Coarse particles (PM10)17Good22.8 mi
  • Nitrogen dioxide6Good6.5 ppb22.8 mi
  • Sulfur dioxide0Good0 ppb22.8 mi
  • Carbon monoxide-0.2 ppm22.8 mi

The days ahead

Moderate each day through Today, led by fine particles. Yesterday measured 52, moderate.

Smoke, the next 43 hours

Little smoke near the ground through Sun 2 AM: the index from smoke stays at 22 or under.

FriSat

Precipitation

What has fallen at King William

None in the last 3 days, to Fri 7 AM. 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 King William, the next 43 hours

Visibility stays 3 miles or more through Sun 2 AM, lowest 3 miles Sat 12 AM.

FriSat

On the radar over King William, VirginiaReflectivityStorm topsRain rateRain, last 24 hoursForecast temperatureForecast rain totalEvery picture

What is measuring near here

The 5 instruments nearest King William, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 2.2 miles away.

measured now3 instruments

measured daily2 instruments

King William 2.6 NWVA-KW-8

In a volunteer observer's own ground/2.2 mi away/141 ft/94 ft above here

precip, snowfall, snow depth

Rank-

Walkerton 2NWWLKV2

At a cooperative observer's station/4.2 mi away/45 ft/2 ft below here

snowfall, snow depth, precip, high, low

Rank-

Station report

The weather at Tappahannock, drawn

The nearest airport reporting now, 13.2 mi from King William, Virginia. From its report of Oct 16, 2026, 7:55 AM local time: 3 of its 5 sheets.

The sky

Overcast at 300 ft; the ceiling is 300 ft.

Section of the sky over Tappahannock, height above the station to scale: overcast cloud with its base at 300 feet, the ceiling at 300 feet.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT XSAFIG. A THE SKY OVER TAPPAHANNOCKSECTION, 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 FTTITLETappahannock, the skySTATION REPORT · ASOS XSATYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 5DATE2026-10-16IDSR-XSA-1DRAWN AS linework on paperSOURCES FB-SKY-001, FB-SKY-017, FB-SKY-016, FB-SKY-018

The air

63.5 F with a dew point of 63.5 F, 100 per cent relative humidity. The air is saturated at the ground; the lowest cloud reported is at 300 ft.

Chart of the air at Tappahannock: temperature 63.5 degrees Fahrenheit and dew point 63.5, 100 per cent relative humidity; the air saturated at the ground, against the lowest cloud reported at 300 feet; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT XSAFIG. B THE AIR AT TAPPAHANNOCKTHE 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 FSATURATED AT THE GROUNDLOWEST CLOUD REPORTED, OVC 300 FTTEMPERATURE AND DEW POINT 63.5 F, 63.5 FRELATIVE HUMIDITY 100 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 POINTTITLETappahannock, the airSTATION REPORT · ASOS XSATYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 5DATE2026-10-16IDSR-XSA-2DRAWN AS linework on paperSOURCES FB-WAT-020, FB-WAT-002, FB-ENG-011, FB-ENG-005

The column

At 135 ft above sea level, 0 per cent of the atmosphere's air lies below the station. The standard atmosphere puts the pressure there at 29.78 inHg and the temperature at 58.5 F; the station's altimeter setting of 29.97 inHg means its barometer reads 29.82 inHg; it reports 63.5 F, 5.0 F warmer than standard.

Section from sea level of where Tappahannock stands in the atmosphere, height to scale: the station 135 feet above sea level with 0 per cent of the air below it; the standard atmosphere's pressure there, 29.78 inches of mercury, and temperature, 58.5 degrees Fahrenheit; the altimeter setting of 29.97 and the station pressure it means, 29.82.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT XSAFIG. D WHERE TAPPAHANNOCK 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 ATMOSPHERETAPPAHANNOCK0 PER CENT OF THE AIR BELOW IT135 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 HERE29.78 inHgSTANDARD TEMPERATURE HERE58.5 FALTIMETER SETTING, REPORTED29.97 inHgITS BAROMETER READS29.82 inHgTEMPERATURE, REPORTED63.5 FTITLETappahannock, the columnSTATION REPORT · ASOS XSATYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 3 of 5DATE2026-10-16IDSR-XSA-3DRAWN AS linework on paperSOURCES FB-ENG-001, FB-ENG-003

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

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Snow on the ground

Elsewhere in Virginia

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

Near King William

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

Near King William

River and lake gauges