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Williamstown, Missouri

Community in Lewis County, Missouri

Air quality

The air at Williamstown

Index 14, good, led by ozone. Read at 5 AM from its reporting area, Lake Sugema (IA), 33 miles off.

14Good
  • Fine particles (PM2.5)7Good-
  • Ozone14Good-

The days ahead

Good each day through Today, led by ozone. Yesterday measured 19, good.

Smoke, the next 44 hours

No smoke near the ground through Mon 1 AM.

SatSun

Precipitation

What has fallen at Williamstown

None in the last 24 hours; 0.30 in over the last 3 days, to Sat 5 AM. Measured by radar and rain gauges, as water.

Last 24 hours
0.00in
Last 3 days
0.30in

Visibility

How far you can see at Williamstown, the next 44 hours

Visibility stays 8 miles or more through Mon 1 AM, lowest 9 miles Sat 8 AM.

SatSun

On the radar over Williamstown, MissouriReflectivityStorm topsRain rateRain, last 24 hoursForecast temperatureForecast rain totalEvery picture

What is measuring near here

The 4 instruments nearest Williamstown, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 9.9 miles away.

measured now2 instruments

measured daily2 instruments

Station report

The weather at Citizen station GW0701, drawn

The nearest instrument reporting now, 13.1 mi from Williamstown, Missouri. From its report of undefined: 3 of its 4 sheets.

The wind

Calm.

Plan of the wind at Citizen station GW0701, north up: calm; beside it the Beaufort scale from calm to hurricane force, force 0, calm, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT GW0701FIG. C THE WIND AT CITIZEN STATION GW0701PLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONCALMBEAUFORT FORCELEAST WIND, MPH0CALM0NOW, 0 MPH1LIGHT AIR1GUST, 1 MPH2LIGHT BREEZE43GENTLE BREEZE84MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLECitizen station GW0701, the windSTATION REPORT · CWOP GW0701TYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 1 of 4DATE2026-10-17IDSR-GW0701-1DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008

The column

At 661 ft above sea level, 2 per cent of the atmosphere's air lies below the station. The standard atmosphere puts the pressure there at 29.21 inHg and the temperature at 56.6 F; the station's altimeter setting of 30.54 inHg means its barometer reads 29.82 inHg; it reports 37.0 F, 19.6 F colder than standard.

Section from sea level of where Citizen station GW0701 stands in the atmosphere, height to scale: the station 661 feet above sea level with 2 per cent of the air below it; the standard atmosphere's pressure there, 29.21 inches of mercury, and temperature, 56.6 degrees Fahrenheit; the altimeter setting of 30.54 and the station pressure it means, 29.82.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT GW0701FIG. D WHERE CITIZEN STATION GW0701 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 ATMOSPHERECITIZEN STATION GW07012 PER CENT OF THE AIR BELOW IT661 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 HERE29.21 inHgSTANDARD TEMPERATURE HERE56.6 FALTIMETER SETTING, REPORTED30.54 inHgITS BAROMETER READS29.82 inHgTEMPERATURE, REPORTED37.0 FTITLECitizen station GW0701, the columnSTATION REPORT · CWOP GW0701TYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 4DATE2026-10-17IDSR-GW0701-2DRAWN AS linework on paperSOURCES FB-ENG-001, FB-ENG-003

The sun

On Oct 17 the noon sun stands 40 degrees above the horizon at 40.38 N, and the day is 10 h 55 min long. Level ground there takes 65 per cent of the noon sunlight a surface facing the sun would.

Elevation of the noon sun at Citizen station GW0701, angles true: on Oct 17 it stands 40 degrees above the horizon, against 73 at the June solstice, 50 at the equinoxes and 26 at the December solstice; the day is 10 h 55 min long.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT GW0701FIG. E THE SUN AT CITIZEN STATION GW0701ELEVATION LOOKING WEST, SOUTH TO THE LEFT: THE NOON SUN ON THE DAY OF THE REPORT, AND AT THE SOLSTICES AND EQUINOXES; ANGLES TRUETHE STATIONJUNE SOLSTICE 73°EQUINOXES 50°DECEMBER SOLSTICE 26°OCT 17, 40°SOUTHANGLES TRUE; THE RAYS ARE OF ONE LENGTH AND DRAW DIRECTION ONLYDAY LENGTH 10 H 55 MINLEVEL GROUND TAKES 65 PER CENT OF THE NOON SUN A FACING SURFACE WOULDLATITUDE 40.38 N; THE SUN'S DECLINATION -9.5°TITLECitizen station GW0701, the sunSTATION REPORT · CWOP GW0701TYPEELEVATIONSCALEANGLES TRUEREVAS REPORTED SHEET 3 of 4DATE2026-10-17IDSR-GW0701-3DRAWN AS linework on paperSOURCES FB-ENG-007

The full report of Citizen station GW0701, in 4 sheets, each beside the Field Book plates that explain it

0in

Snow on the ground

Measured at Mississippi River AT Canton LD20 (CANM7), 16.2 miles from here, read 13 Oct, 06:00. measured daily

Elsewhere in Missouri

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

Near Williamstown

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

Near Williamstown

River and lake gauges