Storm Station
Grinnell, Iowa
57°
Light rain· Feels like 57°·Light air 4 mph NE
Showers and thunderstorms. Cloudy, with a low around 57. Southeast wind around 6 mph. Chance of precipitation is 100%. New rainfall amounts less than a tenth of an inch possible.
-UV
-Air quality
87%Humidity
89%Cloud

What is measuring near here

The 6 instruments nearest Grinnell, 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 now4 instruments

GrinnellGGI

At an airfield/2.6 mi away/1,007 ft/13 ft below here

temp, wind, gust, visibility, precip, pressure

Rank211of 652

Grinnell (I-80)RGRI4

Beside a road/3.4 mi away/922 ft/98 ft below here

temp, pavement temp, wind, visibility, precip

Rank564of 652

Red Rock DamRRMI4

At a dam/29.3 mi away/722 ft/298 ft below here

temp, wind, gust, humidity, pressure

Rank200of 652

Des Moines 17 E54902

At a climate reference station/31.9 mi away/903 ft/117 ft below here

temp, humidity, wind, solar, precip

Rank-

measured daily2 instruments

Grinnell 0.6 NWIA-PW-4

In a volunteer observer's own ground/0.4 mi away/1,014 ft/6 ft below here

precip, snowfall, snow depth

Rank-

Grinnell 3 SWGRII4

At a cooperative observer's station/2.1 mi away/974 ft/46 ft below here

snowfall, snow depth, precip, high, low

Rank-

Station report

The weather at Grinnell, drawn

The nearest airport reporting now, 2.6 mi from Grinnell. From its report of Sep 27, 2026, 3:15 AM local time: 3 of its 6 sheets.

The sky

Scattered at 2,800 ft, scattered at 6,000 ft, overcast at 8,000 ft; the ceiling is 8,000 ft; visibility 7 mi.

Section of the sky over Grinnell, height above the station to scale: scattered cloud with its base at 2,800 feet, scattered cloud with its base at 6,000 feet, overcast cloud with its base at 8,000 feet, the ceiling at 8,000 feet, and visibility of 7 mi.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT GGIFIG. A THE SKY OVER GRINNELLSECTION, 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 STATION02,5005,0007,50010,00012,500ETAGESLOWMIDDLETHE STATIONTHE CEILOMETER READS TO 12,000 FTOVC 8,000 FTOVERCAST, 8 EIGHTHS OF THE SKYSCT 6,000 FTSCATTERED, 3 TO 4 EIGHTHS OF THE SKYSCT 2,800 FTSCATTERED, 3 TO 4 EIGHTHS OF THE SKYCEILING 8,000 FTVISIBILITY, MILES: 7 MI0510TITLEGrinnell, the skySTATION REPORT · ASOS GGITYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-09-27IDSR-GGI-1DRAWN AS linework on paperSOURCES FB-SKY-001, FB-SKY-017, FB-SKY-016, FB-SKY-018, FB-SKY-013, FB-SKY-014

The air

55.8 F with a dew point of 55.6 F, 99 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 100 ft up; the lowest cloud reported is at 2,800 ft.

Chart of the air at Grinnell: temperature 55.8 degrees Fahrenheit and dew point 55.6, 99 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 100 feet above the station, against the lowest cloud reported at 2,800 feet; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT GGIFIG. B THE AIR AT GRINNELLTHE 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 F70 FSATURATES 100 FT ABOVE THE STATION, AT 55.5 FLOWEST CLOUD REPORTED, SCT 2,800 FTTEMPERATURE AND DEW POINT 55.8 F, 55.6 FRELATIVE HUMIDITY 99 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 POINTTITLEGrinnell, the airSTATION REPORT · ASOS GGITYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-09-27IDSR-GGI-2DRAWN AS linework on paperSOURCES FB-WAT-020, FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the east southeast (120 degrees) at 5 mph: force 2, a light breeze on the Beaufort scale.

Plan of the wind at Grinnell, north up: blowing from 120 degrees, the east southeast, at 5 miles an hour; beside it the Beaufort scale from calm to hurricane force, force 2, light breeze, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT GGIFIG. C THE WIND AT GRINNELLPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 120°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE4NOW, 5 MPH3GENTLE BREEZE84MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEGrinnell, the windSTATION REPORT · ASOS GGITYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-09-27IDSR-GGI-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

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

-in

Snow on the ground

Elsewhere in Iowa

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

Near Grinnell

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