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St. Clement, Missouri

Community in Pike County, Missouri

Air quality

The air at St. Clement

Index 18, good, led by ozone. Read at 2 AM from its reporting area, Mark Twain State Park (MO), 34 miles off.

18Good
  • Ozone18Good-
  • Coarse particles (PM10)4Good-

The days ahead

Yesterday measured 12, good.

Smoke, the next 41 hours

No smoke near the ground through Sat 7 PM.

FriSat

Precipitation

What has fallen at St. Clement

0.49 in in the last 24 hours, 1.05 in over the last 3 days, to Fri 1 AM. Measured by radar and rain gauges, as water.

Last 24 hours
0.49in
Last 3 days
1.05in

Visibility

How far you can see at St. Clement, the next 41 hours

Visibility stays 8 miles or more through Sat 7 PM, lowest 9 miles Sat 7 AM.

FriSat

On the radar over St. Clement, MissouriReflectivityStorm topsRain rateRain, last 24 hoursForecast temperatureForecast rain totalEvery picture

What is measuring near here

The 6 instruments nearest St. Clement, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 3.8 miles away.

measured now4 instruments

HannibalHAE

At an airfield/33.1 mi away/772 ft/30 ft below here

temp, wind, gust, visibility, precip, pressure

Rank697of 1,014

measured daily2 instruments

Bowling Green 0.6 SEMO-FSA-163

In a volunteer observer's own ground/3.8 mi away/896 ft/94 ft above here

precip, snowfall, snow depth

Rank-

Bowling GreenBWLM7

At a cooperative observer's station/6.1 mi away/741 ft/61 ft below here

snowfall, snow depth, precip, high, low

Rank794of 1,014

Station report

The weather at Mark Twain HS, drawn

The nearest instrument reporting now, 22.5 mi from St. Clement, Missouri. From its report of Oct 16, 2026, 2:00 AM local time: 3 of its 4 sheets.

The air

53.2 F with a dew point of 48.2 F, 83 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 1,200 ft up.

Chart of the air at Mark Twain HS: temperature 53.2 degrees Fahrenheit and dew point 48.2, 83 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 1,200 feet above the station; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT S2225FIG. B THE AIR AT MARK TWAIN HSTHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,00040 F50 F60 FSATURATES 1,200 FT ABOVE THE STATION, AT 47.0 FTEMPERATURE 53.2 FDEW POINT 48.2 FSPREAD 5.0 FRELATIVE HUMIDITY 83 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 POINTTITLEMark Twain HS, the airSTATION REPORT · SCAN S2225TYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 4DATE2026-10-16IDSR-S2225-1DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The column

At 719 ft above sea level, 3 per cent of the atmosphere's air lies below the station. The standard atmosphere puts the pressure there at 29.15 inHg and the temperature at 56.4 F; it reports 53.2 F, 3.2 F colder than standard.

Section from sea level of where Mark Twain HS stands in the atmosphere, height to scale: the station 719 feet above sea level with 3 per cent of the air below it; the standard atmosphere's pressure there, 29.15 inches of mercury, and temperature, 56.4 degrees Fahrenheit.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT S2225FIG. D WHERE MARK TWAIN HS 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 ATMOSPHEREMARK TWAIN HS3 PER CENT OF THE AIR BELOW IT719 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 HERE29.15 inHgSTANDARD TEMPERATURE HERE56.4 FTEMPERATURE, REPORTED53.2 FTITLEMark Twain HS, the columnSTATION REPORT · SCAN S2225TYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 4DATE2026-10-16IDSR-S2225-2DRAWN AS linework on paperSOURCES FB-ENG-001, FB-ENG-003

The sun

On Oct 16 the noon sun stands 41 degrees above the horizon at 39.51 N, and the day is 10 h 59 min long. Level ground there takes 66 per cent of the noon sunlight a surface facing the sun would.

Elevation of the noon sun at Mark Twain HS, angles true: on Oct 16 it stands 41 degrees above the horizon, against 74 at the June solstice, 50 at the equinoxes and 27 at the December solstice; the day is 10 h 59 min long.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT S2225FIG. E THE SUN AT MARK TWAIN HSELEVATION 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 74°EQUINOXES 50°DECEMBER SOLSTICE 27°OCT 16, 41°SOUTHANGLES TRUE; THE RAYS ARE OF ONE LENGTH AND DRAW DIRECTION ONLYDAY LENGTH 10 H 59 MINLEVEL GROUND TAKES 66 PER CENT OF THE NOON SUN A FACING SURFACE WOULDLATITUDE 39.51 N; THE SUN'S DECLINATION -9.1°TITLEMark Twain HS, the sunSTATION REPORT · SCAN S2225TYPEELEVATIONSCALEANGLES TRUEREVAS REPORTED SHEET 3 of 4DATE2026-10-16IDSR-S2225-3DRAWN AS linework on paperSOURCES FB-ENG-007

The full report of Mark Twain HS, in 4 sheets, each beside the Field Book plates that explain it

-

Snow on the ground

Elsewhere in Missouri

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

Near St. Clement

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

Near St. Clement

River and lake gauges