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Le Mars, Iowa

City in Plymouth County, Iowa

Air quality

The air at Le Mars

Index 19, good, led by ozone. Read at 11 PM from its reporting area, Sioux City (IA), 21 miles off.

19Good
  • Ozone19Good-

The days ahead

Yesterday measured 14, good.

Smoke, the next 44 hours

No smoke near the ground through Sat 7 PM.

FriSat

Precipitation

What has fallen at Le Mars

0.55 in in the last 24 hours, 0.57 in over the last 3 days, to Thu 11 PM. Measured by radar and rain gauges, as water.

Last 24 hours
0.55in
Last 3 days
0.57in

Visibility

How far you can see at Le Mars, the next 44 hours

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

FriSat

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

What is measuring near here

The 7 instruments nearest Le Mars, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 0.4 miles away.

measured now5 instruments

Le MarsLRJ

At an airfield/1.7 mi away/1,194 ft/73 ft below here

temp, wind, gust, visibility, precip, pressure

Rank155of 1,060

AkronRAWI4

Beside a road/10.7 mi away/1,403 ft/136 ft above here

temp, pavement temp, wind, visibility, precip

Rank219of 1,060

MilnervilleBKTI4

At a river or reservoir gauge/22.0 mi away/1,224 ft/43 ft below here

temp, wind, gust, humidity, pressure

Rank195of 1,060

measured daily2 instruments

Le MarsLEMI4

At a cooperative observer's station/0.4 mi away/1,280 ft/13 ft above here

snowfall, snow depth, precip, high, low

Rank843of 1,060

Le Mars 0.9 SEIA-PL-5

In a volunteer observer's own ground/0.6 mi away/1,322 ft/55 ft above here

precip, snowfall, snow depth

Rank-

Station report

The weather at Le Mars, drawn

The nearest airport reporting now, 1.7 mi from Le Mars, Iowa. From its report of Oct 15, 2026, 11:55 PM local time: 3 of its 5 sheets.

The sky

Overcast at 4,100 ft; the ceiling is 4,100 ft; visibility 10 mi or more.

Section of the sky over Le Mars, height above the station to scale: overcast cloud with its base at 4,100 feet, the ceiling at 4,100 feet, and visibility of 10 mi or more.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT LRJFIG. A THE SKY OVER LE MARSSECTION, 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 STATION01,0002,0003,0004,0005,0006,0007,000ETAGESLOWMIDDLETHE STATIONTHE CEILOMETER READS TO 12,000 FT, ABOVE THIS SHEETOVC 4,100 FTOVERCAST, 8 EIGHTHS OF THE SKYCEILING 4,100 FTVISIBILITY, MILES: 10 MI OR MORE0510TITLELe Mars, the skySTATION REPORT · ASOS LRJTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 5DATE2026-10-16IDSR-LRJ-1DRAWN AS linework on paperSOURCES FB-SKY-001, FB-SKY-017, FB-SKY-016, FB-SKY-018

The wind

From the west northwest (300 degrees) at 18 mph: force 4, a moderate breeze on the Beaufort scale. The strongest gust today was 33 mph.

Plan of the wind at Le Mars, north up: blowing from 300 degrees, the west northwest, at 18 miles an hour; beside it the Beaufort scale from calm to hurricane force, force 4, moderate breeze, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT LRJFIG. C THE WIND AT LE MARSPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 300°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE43GENTLE BREEZE84MODERATE BREEZE13NOW, 18 MPH5FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLELe Mars, the windSTATION REPORT · ASOS LRJTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 2 of 5DATE2026-10-16IDSR-LRJ-2DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

The column

At 1,194 ft above sea level, 4 per cent of the atmosphere's air lies below the station. The standard atmosphere puts the pressure there at 28.65 inHg and the temperature at 54.7 F; the station's altimeter setting of 30.23 inHg means its barometer reads 28.95 inHg.

Section from sea level of where Le Mars stands in the atmosphere, height to scale: the station 1,194 feet above sea level with 4 per cent of the air below it; the standard atmosphere's pressure there, 28.65 inches of mercury, and temperature, 54.7 degrees Fahrenheit; the altimeter setting of 30.23 and the station pressure it means, 28.95.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT LRJFIG. D WHERE LE MARS 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 ATMOSPHERELE MARS4 PER CENT OF THE AIR BELOW IT1,194 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 HERE28.65 inHgSTANDARD TEMPERATURE HERE54.7 FALTIMETER SETTING, REPORTED30.23 inHgITS BAROMETER READS28.95 inHgTITLELe Mars, the columnSTATION REPORT · ASOS LRJTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 3 of 5DATE2026-10-16IDSR-LRJ-3DRAWN AS linework on paperSOURCES FB-ENG-001, FB-ENG-003

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

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Snow on the ground

Elsewhere in Iowa

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

Near Le Mars

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

Near Le Mars

River and lake gauges