Storm Station
Harmon, Illinois
50° 69°/50°
Clear· Feels like 50°·Light breeze 4 mph NE
Mostly cloudy, with a low around 50. East wind 0 to 5 mph.
0UV Low
45Air quality
92%Humidity
5%Cloud
Now
4:00 AM
50feels50
now, clear
Today
Sep 27
6950
overcast
Mon
Sep 28
7051
overcast
Tue
Sep 29
7554
13%
overcast
Wed
Sep 30
7764
43%
drizzle light
Thu
Oct 1
7555
67%
13mph
showers light
Fri
Oct 2
6346
34%
overcast
Sat
Oct 3
6644
18%
13mph
overcast
50°
69°50°
70°51°
75°54°
77°64°
75°55°
63°46°
66°44°

As of 4:00 AM in Harmon, Illinois.

What is measuring near here

The 5 instruments nearest Harmon, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 6.4 miles away.

measured now3 instruments

Sterling RockfalSQI

At an airfield/6.4 mi away/646 ft/24 ft below here

temp, wind, gust, visibility, precip, pressure

Rank39of 417

Shabbona 5 NNE54811

At a climate reference station/37.3 mi away/861 ft/191 ft above here

temp, humidity, wind, solar, precip

Rank-

measured daily2 instruments

Rock Falls 3.1 SIL-WD-22

In a volunteer observer's own ground/7.5 mi away/649 ft/21 ft below here

precip, snowfall, snow depth

Rank-

Dixon WWTPDXNI2

At a water treatment plant/8.1 mi away/650 ft/20 ft below here

snowfall, snow depth, precip, high, low

Rank-

Station report

The weather at Sterling Rockfal, drawn

The nearest airport reporting now, 6.4 mi from Harmon. From its report of Sep 27, 2026, 3:56 AM local time: 3 of its 6 sheets.

The sky

No cloud below 12,000 ft; visibility 10 mi or more.

Section of the sky over Sterling Rockfal, height above the station to scale: no cloud detected below 12,000 feet, the reach of its ceilometer, and visibility of 10 mi or more.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT SQIFIG. A THE SKY OVER STERLING ROCKFALSECTION, 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 STATION05001,0001,5002,0002,5003,000ETAGESLOWTHE STATIONTHE CEILOMETER READS TO 12,000 FT, ABOVE THIS SHEETNO CLOUD DETECTED BELOW 12,000 FTVISIBILITY, MILES: 10 MI OR MORE0510TITLESterling Rockfal, the skySTATION REPORT · ASOS SQITYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-09-27IDSR-SQI-1DRAWN AS linework on paperSOURCES FB-SKY-001

The air

49.0 F with a dew point of 49.0 F, 100 per cent relative humidity. The air is saturated at the ground.

Chart of the air at Sterling Rockfal: temperature 49.0 degrees Fahrenheit and dew point 49.0, 100 per cent relative humidity; the air saturated at the ground; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT SQIFIG. B THE AIR AT STERLING ROCKFALTHE 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 FSATURATED AT THE GROUNDTEMPERATURE AND DEW POINT 49.0 F, 49.0 FRELATIVE HUMIDITY 100 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 POINTTITLESterling Rockfal, the airSTATION REPORT · ASOS SQITYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-09-27IDSR-SQI-2DRAWN AS linework on paperSOURCES FB-WAT-020, FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the east northeast (70 degrees) at 5 mph: force 2, a light breeze on the Beaufort scale.

Plan of the wind at Sterling Rockfal, north up: blowing from 70 degrees, the east northeast, 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 SQIFIG. C THE WIND AT STERLING ROCKFALPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 70°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE4NOW, 5 MPH3GENTLE BREEZE84MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLESterling Rockfal, the windSTATION REPORT · ASOS SQITYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-09-27IDSR-SQI-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

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

-in

Snow on the ground

Elsewhere in Illinois

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

Near Harmon

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