Storm Station
Postville, Iowa
57° 61°/58°
Overcast· Feels like 57°·Light air 2 mph SE
Rain showers likely. Mostly cloudy, with a low around 56. South wind around 2 mph. Chance of precipitation is 70%. New rainfall amounts less than a tenth of an inch possible.
0UV Low
-Air quality
86%Humidity
100%Cloud
Now
3:30 AM
57feels57
now, overcast
Today
Sep 27
6158
12%
drizzle dense
Mon
Sep 28
7156
overcast
Tue
Sep 29
6651
59%
rain
Wed
Sep 30
6361
63%
showers
Thu
Oct 1
6347
46%
15mph
drizzle
Fri
Oct 2
5841
25%
clear day
Sat
Oct 3
6038
20%
14mph
overcast
57°
61°58°
71°56°
66°51°
63°61°
63°47°
58°41°
60°38°

As of 3:30 AM in Postville, Iowa.

What is measuring near here

The 5 instruments nearest Postville, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 0.6 miles away.

measured now3 instruments

Decorah (IA 9)RDCI4

Beside a road/12.9 mi away/1,017 ft/157 ft below here

temp, pavement temp, wind, visibility, precip

Rank609of 652

DecorahDEH

At an airfield/15.9 mi away/1,157 ft/17 ft below here

temp, wind, gust, visibility, precip, pressure

Rank211of 652

measured daily2 instruments

PostvillePSTI4

At a cooperative observer's station/0.6 mi away/1,148 ft/26 ft below here

snowfall, snow depth, precip, high, low

Rank-

Postville 5.5 NEIA-AL-6

In a volunteer observer's own ground/5.4 mi away/1,080 ft/94 ft below here

precip, snowfall, snow depth

Rank-

Station report

The weather at Decorah, drawn

The nearest airport reporting now, 15.9 mi from Postville. From its report of Sep 27, 2026, 3:15 AM local time: 3 of its 6 sheets.

The sky

Overcast at 4,700 ft; the ceiling is 4,700 ft; visibility 10 mi or more.

Section of the sky over Decorah, height above the station to scale: overcast cloud with its base at 4,700 feet, the ceiling at 4,700 feet, and visibility of 10 mi or more.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT DEHFIG. A THE SKY OVER DECORAHSECTION, 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 STATION01,0002,0003,0004,0005,0006,0007,0008,000ETAGESLOWMIDDLETHE STATIONTHE CEILOMETER READS TO 12,000 FT, ABOVE THIS SHEETOVC 4,700 FTOVERCAST, 8 EIGHTHS OF THE SKYCEILING 4,700 FTVISIBILITY, MILES: 10 MI OR MORE0510TITLEDecorah, the skySTATION REPORT · ASOS DEHTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-09-27IDSR-DEH-1DRAWN AS linework on paperSOURCES FB-SKY-001, FB-SKY-017, FB-SKY-016, FB-SKY-018

The air

59.0 F with a dew point of 55.4 F, 88 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 4,700 ft.

Chart of the air at Decorah: temperature 59.0 degrees Fahrenheit and dew point 55.4, 88 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 4,700 feet; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT DEHFIG. B THE AIR AT DECORAHTHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,0004,0005,00040 F50 F60 F70 FSATURATES 800 FT ABOVE THE STATION, AT 54.6 FLOWEST CLOUD REPORTED, OVC 4,700 FTTEMPERATURE 59.0 FDEW POINT 55.4 FSPREAD 3.6 FRELATIVE HUMIDITY 88 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 POINTTITLEDecorah, the airSTATION REPORT · ASOS DEHTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-09-27IDSR-DEH-2DRAWN AS linework on paperSOURCES FB-WAT-020, FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the south southeast (150 degrees) at 5 mph: force 2, a light breeze on the Beaufort scale.

Plan of the wind at Decorah, north up: blowing from 150 degrees, the south 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 DEHFIG. C THE WIND AT DECORAHPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 150°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE4NOW, 5 MPH3GENTLE BREEZE84MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEDecorah, the windSTATION REPORT · ASOS DEHTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-09-27IDSR-DEH-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

The full report of Decorah, 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 Postville

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