Storm Station
South Wilmington, Illinois
56°
Partly cloudy· Feels like 56°·Light breeze 5 mph E
Patchy fog. Mostly cloudy, with a low around 48. Northeast wind around 0 mph.
-UV
-Air quality
82%Humidity
40%Cloud

What is measuring near here

The 4 instruments nearest South Wilmington, 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 now2 instruments

Midewin Tallgrass PrairieWMGI2

At a river or reservoir gauge/13.9 mi away/561 ft/24 ft below here

temp, wind, gust, humidity, pressure

Rank38of 417

Morris-WashburnC09

At an airfield/18.9 mi away/584 ft/1 ft below here

temp, wind, gust, visibility, precip, pressure

Rank-

measured daily2 instruments

Gardner 2.2 SEIL-GY-39

In a volunteer observer's own ground/0.5 mi away/593 ft/8 ft above here

precip, snowfall, snow depth

Rank-

Dwight WWTPCWWI2

At a water treatment plant/8.4 mi away/623 ft/38 ft above here

snowfall, snow depth, precip, high, low

Rank-

Station report

The weather at Midewin Tallgrass Prairie, drawn

The nearest instrument reporting now, 13.9 mi from South Wilmington. From its report of Sep 27, 2026, 3:23 AM local time: 3 of its 5 sheets.

The air

48.0 F with a dew point of 47.5 F, 98 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 100 ft up.

Chart of the air at Midewin Tallgrass Prairie: temperature 48.0 degrees Fahrenheit and dew point 47.5, 98 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; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT WMGI2FIG. B THE AIR AT MIDEWIN TALLGRASS PRAIRIETHE 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 FSATURATES 100 FT ABOVE THE STATION, AT 47.3 FTEMPERATURE AND DEW POINT 48.0 F, 47.5 FRELATIVE HUMIDITY 98 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 POINTTITLEMidewin Tallgrass Prairie, the airSTATION REPORT · DCP WMGI2TYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 5DATE2026-09-27IDSR-WMGI2-1DRAWN AS linework on paperSOURCES FB-WAT-020, FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

Calm.

Plan of the wind at Midewin Tallgrass Prairie, north up: calm; beside it the Beaufort scale from calm to hurricane force, force 0, calm, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT WMGI2FIG. C THE WIND AT MIDEWIN TALLGRASS PRAIRIEPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONCALMBEAUFORT FORCELEAST WIND, MPH0CALM0NOW, 0 MPH1LIGHT AIR1GUST, 3 MPH2LIGHT BREEZE43GENTLE BREEZE84MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEMidewin Tallgrass Prairie, the windSTATION REPORT · DCP WMGI2TYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 2 of 5DATE2026-09-27IDSR-WMGI2-2DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008

The column

At 561 ft above sea level, 2 per cent of the atmosphere's air lies below the station. The standard atmosphere puts the pressure there at 29.32 inHg and the temperature at 57.0 F; it reports 48.0 F, 9.0 F colder than standard.

Section from sea level of where Midewin Tallgrass Prairie stands in the atmosphere, height to scale: the station 561 feet above sea level with 2 per cent of the air below it; the standard atmosphere's pressure there, 29.32 inches of mercury, and temperature, 57.0 degrees Fahrenheit.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT WMGI2FIG. D WHERE MIDEWIN TALLGRASS PRAIRIE 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 ATMOSPHEREMIDEWIN TALLGRASS PRAIRIE2 PER CENT OF THE AIR BELOW IT561 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 HERE29.32 inHgSTANDARD TEMPERATURE HERE57.0 FTEMPERATURE, REPORTED48.0 FTITLEMidewin Tallgrass Prairie, the columnSTATION REPORT · DCP WMGI2TYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 3 of 5DATE2026-09-27IDSR-WMGI2-3DRAWN AS linework on paperSOURCES FB-ENG-001, FB-ENG-003

The full report of Midewin Tallgrass Prairie, in 5 sheets, each beside the Field Book plates that explain it

0in

Snow on the ground

Measured at Dwight WWTP (CWWI2), 8.4 miles from here, read 24 Sep, 07:00. measured daily

Elsewhere in Illinois

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

Near South Wilmington

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