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Williamsburg, Iowa

City in Iowa County, Iowa

Air quality

The air at Williamsburg

Index 23, good, led by fine particles. Read at 1 AM from its reporting area, Iowa City (IA), 23 miles off.

23Good
  • Fine particles (PM2.5)23Good-

The days ahead

Good each day through Today, led by ozone. Yesterday measured 26, good.

Smoke, the next 43 hours

No smoke near the ground through Sat 7 PM.

FriSat

Precipitation

What has fallen at Williamsburg

0.36 in in the last 24 hours, and none in the 2 days before, to Fri 12 AM. Measured by radar and rain gauges, as water.

Last 24 hours
0.36in
Last 3 days
0.36in

Visibility

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

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

FriSat

On the radar over Williamsburg, IowaReflectivityStorm topsRain rateRain, last 24 hoursForecast temperatureForecast rain totalEvery picture

What is measuring near here

The 6 instruments nearest Williamsburg, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 0.1 miles away.

measured now4 instruments

measured daily2 instruments

Station report

The weather at Williamsburg (I-80), drawn

The nearest instrument reporting now, 1.8 mi from Williamsburg, Iowa. From its report of Oct 16, 2026, 12:55 AM local time: 3 of its 5 sheets.

The air

46.8 F with a dew point of 38.3 F, 72 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 1,900 ft up.

Chart of the air at Williamsburg (I-80): temperature 46.8 degrees Fahrenheit and dew point 38.3, 72 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 1,900 feet above the station; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT RWBI4FIG. B THE AIR AT WILLIAMSBURG (I-80)THE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,00030 F40 F50 F60 FSATURATES 1,900 FT ABOVE THE STATION, AT 36.4 FTEMPERATURE 46.8 FDEW POINT 38.3 FSPREAD 8.5 FRELATIVE HUMIDITY 72 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 POINTTITLEWilliamsburg (I-80), the airSTATION REPORT · RWIS RWBI4TYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 5DATE2026-10-16IDSR-RWBI4-1DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the west northwest (300 degrees) at 14 mph, gusting 15 mph: force 4, a moderate breeze on the Beaufort scale. The strongest gust today was 23 mph.

Plan of the wind at Williamsburg (I-80), north up: blowing from 300 degrees, the west northwest, at 14 miles an hour, gusting 15; beside it the Beaufort scale from calm to hurricane force, force 4, moderate breeze, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT RWBI4FIG. C THE WIND AT WILLIAMSBURG (I-80)PLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 300°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE43GENTLE BREEZE84MODERATE BREEZE13NOW, 14 MPH5FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEWilliamsburg (I-80), the windSTATION REPORT · RWIS RWBI4TYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 2 of 5DATE2026-10-16IDSR-RWBI4-2DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008

The column

At 853 ft above sea level, 3 per cent of the atmosphere's air lies below the station. The standard atmosphere puts the pressure there at 29.01 inHg and the temperature at 56.0 F; it reports 46.8 F, 9.2 F colder than standard.

Section from sea level of where Williamsburg (I-80) stands in the atmosphere, height to scale: the station 853 feet above sea level with 3 per cent of the air below it; the standard atmosphere's pressure there, 29.01 inches of mercury, and temperature, 56.0 degrees Fahrenheit.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT RWBI4FIG. D WHERE WILLIAMSBURG (I-80) 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 ATMOSPHEREWILLIAMSBURG (I-80)3 PER CENT OF THE AIR BELOW IT853 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 HERE29.01 inHgSTANDARD TEMPERATURE HERE56.0 FTEMPERATURE, REPORTED46.8 FTITLEWilliamsburg (I-80), the columnSTATION REPORT · RWIS RWBI4TYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 3 of 5DATE2026-10-16IDSR-RWBI4-3DRAWN AS linework on paperSOURCES FB-ENG-001, FB-ENG-003

The full report of Williamsburg (I-80), in 5 sheets, each beside the Field Book plates that explain it

0in

Snow on the ground

Measured at Williamsburg 3 SE (WLBI4), 0.3 miles from here, read 13 Oct, 07:00. measured daily

Elsewhere in Iowa

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

Near Williamsburg

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

Near Williamsburg

River and lake gauges