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Charter Oak, Iowa

City in Crawford County, Iowa

Air quality

The air at Charter Oak

Index 19, good, led by ozone. Read at 5 AM from its reporting area, Pisgah (IA), 24 miles off.

19Good
  • Ozone19Good19 ppb23.9 mi

The days ahead

Good each day through Today, led by ozone. Yesterday measured 20, good.

Smoke, the next 45 hours

No smoke near the ground through Sun 1 AM.

FriSat

Precipitation

What has fallen at Charter Oak

0.91 in in the last 24 hours, and none in the 2 days before, to Fri 4 AM. Measured by radar and rain gauges, as water.

Last 24 hours
0.91in
Last 3 days
0.91in

Visibility

How far you can see at Charter Oak, the next 45 hours

Visibility stays 8 miles or more through Sun 1 AM, lowest 9 miles Sat 2 AM.

FriSat

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

What is measuring near here

The 6 instruments nearest Charter Oak, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 3.4 miles away.

measured now4 instruments

DenisonDNS

At an airfield/12.2 mi away/1,250 ft/50 ft below here

temp, wind, gust, visibility, precip, pressure

Rank371of 1,060

DenisonRDNI4

Beside a road/16.4 mi away/1,398 ft/98 ft above here

temp, pavement temp, wind, visibility, precip

Rank1,021of 1,060

measured daily2 instruments

Charter Oak 3.3 NNEIA-CF-7

In a volunteer observer's own ground/3.4 mi away/1,362 ft/62 ft above here

precip, snowfall, snow depth

Rank-

Mapleton No. 2MPTI4

At a cooperative observer's station/12.1 mi away/1,161 ft/139 ft below here

snowfall, snow depth, precip, high, low

Rank27of 1,060

Station report

The weather at Denison, drawn

The nearest airport reporting now, 12.2 mi from Charter Oak, Iowa. From its report of Oct 16, 2026, 5:35 AM local time: 3 of its 6 sheets.

The sky

Overcast at 2,200 ft; the ceiling is 2,200 ft; visibility 10 mi or more.

Section of the sky over Denison, height above the station to scale: overcast cloud with its base at 2,200 feet, the ceiling at 2,200 feet, and visibility of 10 mi or more.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT DNSFIG. A THE SKY OVER DENISONSECTION, 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 STATION05001,0001,5002,0002,5003,0003,500ETAGESLOWTHE STATIONTHE CEILOMETER READS TO 12,000 FT, ABOVE THIS SHEETOVC 2,200 FTOVERCAST, 8 EIGHTHS OF THE SKYCEILING 2,200 FTVISIBILITY, MILES: 10 MI OR MORE0510TITLEDenison, the skySTATION REPORT · ASOS DNSTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-DNS-1DRAWN AS linework on paperSOURCES FB-SKY-001, FB-SKY-017, FB-SKY-016, FB-SKY-018

The air

46.4 F with a dew point of 42.8 F, 87 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 800 ft up; the lowest cloud reported is at 2,200 ft.

Chart of the air at Denison: temperature 46.4 degrees Fahrenheit and dew point 42.8, 87 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 800 feet above the station, against the lowest cloud reported at 2,200 feet; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT DNSFIG. B THE AIR AT DENISONTHE 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 800 FT ABOVE THE STATION, AT 42.0 FLOWEST CLOUD REPORTED, OVC 2,200 FTTEMPERATURE 46.4 FDEW POINT 42.8 FSPREAD 3.6 FRELATIVE HUMIDITY 87 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 POINTTITLEDenison, the airSTATION REPORT · ASOS DNSTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-DNS-2DRAWN AS linework on paperSOURCES FB-WAT-020, FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the northwest (320 degrees) at 22 mph, gusting 36 mph: force 5, a fresh breeze on the Beaufort scale. The strongest gust today was 39 mph.

Plan of the wind at Denison, north up: blowing from 320 degrees, the northwest, at 22 miles an hour, gusting 36; beside it the Beaufort scale from calm to hurricane force, force 5, fresh breeze, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT DNSFIG. C THE WIND AT DENISONPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 320°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE43GENTLE BREEZE84MODERATE BREEZE135FRESH BREEZE19NOW, 22 MPH6STRONG BREEZE257NEAR GALE32GUST, 36 MPH8GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEDenison, the windSTATION REPORT · ASOS DNSTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-DNS-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

The full report of Denison, in 6 sheets, each beside the Field Book plates that explain it

0in

Snow on the ground

Measured at Mapleton No. 2 (MPTI4), 12.1 miles from here, read 15 Oct, 07:00. measured daily

Elsewhere in Iowa

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

Near Charter Oak

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

Near Charter Oak

River and lake gauges