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Ottumwa, Iowa

City in Wapello County, Iowa

Air quality

The air at Ottumwa

Index 17, good, led by fine particles. Read at 12 AM from its reporting area, Lake Sugema (IA), 31 miles off.

17Good
  • Fine particles (PM2.5)17Good-
  • Ozone16Good-

The days ahead

Good each day through Today, led by fine particles. Yesterday measured 28, good.

Smoke, the next 44 hours

No smoke near the ground through Sat 7 PM.

FriSat

Precipitation

What has fallen at Ottumwa

0.05 in in the last 24 hours, and none in the 2 days before, to Thu 11 PM. Measured by radar and rain gauges, as water.

Last 24 hours
0.05in
Last 3 days
0.05in

Visibility

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

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

FriSat

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

What is measuring near here

The 6 instruments nearest Ottumwa, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 0.5 miles away.

measured now4 instruments

OttumwaOTM

At an airfield/6.0 mi away/846 ft/198 ft above here

temp, wind, gust, visibility, precip, pressure

Rank-

measured daily2 instruments

Ottumwa 1.6 SIA-WP-1

In a volunteer observer's own ground/1.5 mi away/650 ft/2 ft above here

precip, snowfall, snow depth

Rank-

OttumwaOTWI4

At a cooperative observer's station/1.9 mi away/804 ft/156 ft above here

snowfall, snow depth, precip, high, low

Rank673of 1,060

Station report

The weather at Ottumwa (US 63), drawn

The nearest instrument reporting now, 0.5 mi from Ottumwa, Iowa. From its report of Oct 16, 2026, 12:00 AM local time: 3 of its 5 sheets.

The air

54.0 F with a dew point of 42.4 F, 65 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 2,700 ft up.

Chart of the air at Ottumwa (US 63): temperature 54.0 degrees Fahrenheit and dew point 42.4, 65 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 2,700 feet above the station; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT ROTI4FIG. B THE AIR AT OTTUMWA (US 63)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 STATION01,0002,0003,0004,00030 F40 F50 F60 FSATURATES 2,700 FT ABOVE THE STATION, AT 39.8 FTEMPERATURE 54.0 FDEW POINT 42.4 FSPREAD 11.6 FRELATIVE HUMIDITY 65 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 POINTTITLEOttumwa (US 63), the airSTATION REPORT · RWIS ROTI4TYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 5DATE2026-10-16IDSR-ROTI4-1DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the north (0 degrees) at 26 mph, gusting 29 mph: force 6, a strong breeze on the Beaufort scale. The strongest gust today was 29 mph.

Plan of the wind at Ottumwa (US 63), north up: blowing from 0 degrees, the north, at 26 miles an hour, gusting 29; beside it the Beaufort scale from calm to hurricane force, force 6, strong breeze, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT ROTI4FIG. C THE WIND AT OTTUMWA (US 63)PLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 0°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE43GENTLE BREEZE84MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE25NOW, 26 MPH7NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEOttumwa (US 63), the windSTATION REPORT · RWIS ROTI4TYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 2 of 5DATE2026-10-16IDSR-ROTI4-2DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008

The column

At 643 ft above sea level, 2 per cent of the atmosphere's air lies below the station. The standard atmosphere puts the pressure there at 29.23 inHg and the temperature at 56.7 F; it reports 54.0 F, 2.7 F colder than standard.

Section from sea level of where Ottumwa (US 63) stands in the atmosphere, height to scale: the station 643 feet above sea level with 2 per cent of the air below it; the standard atmosphere's pressure there, 29.23 inches of mercury, and temperature, 56.7 degrees Fahrenheit.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT ROTI4FIG. D WHERE OTTUMWA (US 63) 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 ATMOSPHEREOTTUMWA (US 63)2 PER CENT OF THE AIR BELOW IT643 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 HERE29.23 inHgSTANDARD TEMPERATURE HERE56.7 FTEMPERATURE, REPORTED54.0 FTITLEOttumwa (US 63), the columnSTATION REPORT · RWIS ROTI4TYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 3 of 5DATE2026-10-16IDSR-ROTI4-3DRAWN AS linework on paperSOURCES FB-ENG-001, FB-ENG-003

The full report of Ottumwa (US 63), 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 Ottumwa

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

Near Ottumwa

River and lake gauges