Illinois Weather Conditions


Midwest Surface Map	National Surface Map

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For an explanation on decoding this map, click here
High-resolution surface maps are also available.
Maps are courtesy of the Weather Prediction Center

Central Illinois Mesonet Observation Map

Current Hourly Weather Conditions

Illinois State Weather Roundup

Lincoln, IL (ILX) Upper Air Sounding

Upper Air Soundings across the U.S.

Site-Specific Observations:

The following airport observations are in decoded format. Select the station identifier below the map. If you need to have the encoded observations, click on "Raw Observations" after selecting the airport link below.

Map of weather stations in and around Illinois

K06C -- Schaumburg Regional Airport
K1H2 -- Effingham, Effingham County Memorial Airport
K3LF -- Litchfield Municipal Airport
KAAA -- Lincoln, Logan County Airport
KAJG -- St. Francisville, Mt. Carmel Municipal Airport
KALN -- Alton, St. Louis Regional Airport
KARR -- Chicago-Aurora Municipal Airport
KBMI -- Central Illinois Regional Airport at Bloomington-Normal
KBLV -- Belleville, Scott AFB (MidAmerica St. Louis Airport)
KC09 -- Morris Municipal Airport
KC75 -- Lacon, Marshall County Airport
KCIR -- Cairo Regional Airport
KCMI -- Champaign-Urbana, University of Illinois- Willard Airport
KCPS -- Cahokia, St. Louis Downtown Airport
KCUL -- Carmi Municipal Airport
KDEC -- Decatur Airport
KDKB -- De Kalb, Taylor Municipal Airport
KDNV -- Danville, Vermilion Regional Airport
KDPA -- West Chicago, DuPage Airport
KENL -- Centralia Municipal Airport

KFEP -- Freeport, Albertus Airport
KFOA -- Flora Municipal Airport
KFWC -- Fairfield Municipal Airport
KGBG -- Galesburg Municipal Airport
KHSB -- Harrisburg-Raleigh Airport
KI63 -- Mount Sterling Municipal Airport
KIGQ -- Lansing Municipal Airport
KIJX -- Jacksonville Municipal Airport
KIKK -- Greater Kankakee Airport
KJOT -- Joliet Regional Airport
KLOT -- Romeoville, Lewis University Airport
KLWV -- Lawrenceville-Vincennes Int'l Airport
KM30 -- Metropolis Municipal Airport
KMDH -- Carbondale/Murphysboro, Southern Illinois Airport
KMDW -- Chicago, Midway Int'l Airport
KMLI -- Moline, Quad City Int'l Airport
KMQB -- Macomb Municipal Airport
KMTO -- Mattoon, Coles County Municipal Airport
KMVN -- Mount Vernon Airport
KMWA -- Marion, Veterans Airport of Southern Illinois

KOLY -- Olney-Noble Airport
KORD -- Chicago, O'Hare Int'l Airport
KPIA -- General Downing - Peoria Int'l Airport
KPNT -- Pontiac Municipal Airport
KPPQ -- Pittsfield, Penstone Municipal Airport
KPRG -- Paris, Edgar County Airport
KPWK -- Wheeling, Chicago Executive Airport
KRFD -- Chicago/Rockford Int'l Airport
KRPJ -- Rochelle Municipal Airport
KRSV -- Robinson, Crawford County Airport
KSAR -- Sparta Community Airport
KSFY -- Savanna, Tri-Township Airport
KSLO -- Salem-Leckrone Airport
KSPI -- Springfield, Abraham Lincoln Capital Airport
KSQI -- Sterling/Rock Falls, Whiteside County Airport
KTAZ -- Taylorville Municipal Airport
KTIP -- Rantoul National Aviation Center
KUGN -- Waukegan National Airport
KUIN -- Quincy Regional Airport
KVYS -- Peru, Illinois Valley Regional Airport

Some caveats about this data:

This data has not been quality controlled, and should be considered preliminary. CERTIFIED climate data is available from the National Centers for Environmental Information or from the Midwestern Regional Climate Center.
Lack of data for a period of time may be the result of a communications failure, and the observations may still be available from one of the centers above.
Weather described as "fair" means that no clouds were observed below 12,000 feet. This is a limitation of most automated stations, which make up nearly all observations in the list.
Sky conditions give the general state of the sky, and the height of each cloud layer. Heights are given in hundreds of feet (e.g. 120 is 12,000 ft; 012 is 1,200 ft., 001 is 100 ft.). State of the sky is divided into SKC (sky clear), CLR (clear below 12,000 ft), FEW (2/8 or less cloud cover up to that height), SCT (3/8 through 4/8 of cloud cover up to that height), BKN (5/8 through 7/8 of cloud cover up to that height), OVC (sky cloudy), and VV (vertical visibility -- clouds obscured by precipitation or obstructions to vision).
Weather "in the vicinity" indicates within 5 to 10 miles of the station.