How to interpret surface observations
Latest Illinois Observations/Forecast:
Plymouth State University Weather Center
URL Address: <a href="https://vortex.plymouth.edu/">https://vortex.plymouth.edu</a><br>
Illinois Observations for Tue Aug 11 at 06:00 AM EDT
T TD RH WIND GUST ALSTG SLP VIS CLOUDS WX PR6 PR24
Station F F % deg kts kts in Hg mb mi 100ftCOV in in ID
ALTON/ST LOUIS R 77 75 94 170 at 4 29.98 10 CLR KALN
AURORA MUNICIPAL 72 72 100 100 at 3 29.92 2 CLR BR KARR
BLOOMINGTON/NORM 77 77 100 220 at 9 29.94 1012.9 10 CLR KBMI
CAHOKIA/ST. LOUI 79 73 84 190 at 3 29.96 1014.2 10 CLR KCPS
CAIRO 77 75 94 0 at 0 30.05 10 CLR KCIR
CENTRALIA 77 75 94 0 at 0 29.99 10 CLR KENL
CHAMPAIGN/URBANA 75 75 100 200 at 6 29.95 1013.3 8 CLR KCMI
CHICAGO NEXRAD 73 73 100 360 at 3 29.94 3 34 OVC BR KLOT
CHICAGO/LANSING 73 72 94 0 at 0 29.93 5 50 BKN BR KIGQ
CHICAGO/MIDWAY 75 72 89 40 at 4 29.91 10 250 BKN KMDW
CHICAGO/O'HARE A 75 72 89 100 at 7 29.89 10 250 BKN KORD
CHICAGO/PALWAUKE 73 72 94 40 at 8 29.97 10 60 OVC KPWK
CHICAGO/WAUKEGAN 72 70 94 130 at 12 29.89 10 38 OVC TS KUGN
DANVILLE/VERMILI 77 76 96 210 at 5 29.97 2 VV KDNV
DE KALB 72 72 100 130 at 4 29.95 2 CLR BR KDKB
DECATUR AIRPORT 79 75 89 230 at 8 29.95 1013.4 10 CLR KDEC
EFFINGHAM 77 77 100 180 at 3 30.0 10 CLR K1H2
FAIRFIELD 75 73 94 200 at 3 30.0 10 CLR KFWC
FLORA 77 75 94 210 at 6 29.99 10 CLR KFOA
FREEPORT 75 73 94 160 at 6 29.92 0.2 2 OVC KFEP
GALESBURG MUNICI 73 73 100 190 at 4 29.92 10 CLR KGBG
GREATER KANKAKEE 75 73 94 0 at 0 29.94 10 60 SCT KIKK
HARRISBURG 79 75 89 230 at 4 30.02 10 CLR KHSB
JACKSONVILLE 77 77 100 190 at 5 29.94 10 CLR KIJX
LACON/MARSHALL C 75 72 89 0 at 0 29.9 10 CLR KC75
LAWRENCEVILLE-VI 75 73 94 180 at 5 29.99 1014.9 10 CLR KLWV
LINCOLN/LOGAN CO 79 79 100 200 at 3 29.94 10 CLR KAAA
LITCHFIELD 75 73 94 190 at 4 29.98 7 CLR K3LF
MACOMB 77 77 100 220 at 5 29.93 10 CLR KMQB
MARION REGIONAL 77 77 100 210 at 7 30.03 10 CLR KMWA
MATTOON/CHARLEST 77 73 89 200 at 8 29.96 1013.6 10 CLR KMTO
METROPOLIS_MUNIC 79 73 84 190 at 4 30.05 10 CLR KM30
MOLINE/QUAD CITY 73 73 100 0 at 0 29.87 1010.9 7 CLR KMLI
MOUNT VERNON (AW 75 73 94 200 at 5 30.0 1015.8 10 CLR KMVN
MOUNT_CARMEL 79 75 89 190 at 4 30.0 10 CLR KAJG
OLNEY-NOBLE 77 75 94 200 at 3 30.0 10 CLR KOLY
PARIS 77 75 94 210 at 7 29.98 10 CLR KPRG
PEORIA REGIONAL 75 75 100 210 at 5 29.9 1012.0 10 CLR KPIA
PERU 75 75 100 180 at 4 29.91 10 60 BKN KVYS
PONTIAC 74 74 100 0 at 0 29.93 7 65 OVC KPNT
QUINCY MUNI/BALD 75 72 89 200 at 6 29.92 1012.1 10 CLR KUIN
RANTOUL/FRANK EL 76 75 96 220 at 8 29.95 10 CLR KTIP
ROBINSON_MUNI_AR 75 75 100 190 at 5 29.98 5 CLR BR KRSV
ROCHELLE MUNI AI 73 72 94 100 at 3 29.92 0.2 1 OVC FG KRPJ
ROCKFORD 73 72 94 10 at 4 29.93 1012.8 3 7 BKN BR KRFD
SALEM-LECKRONE 79 75 89 at 29.99 10 KSLO
SAVANNA/TRI-TOWN 73 72 94 0 at 0 29.89 1 29 SCT BR KSFY
SCOTT AFB/BELLEV 79 77 94 210 at 4 29.96 1014.4 10 CLR KBLV
SPRINGFIELD/CAPI 79 75 89 210 at 6 29.93 1013.0 10 CLR KSPI
STERLING ROCKFAL 73 73 100 100 at 5 29.9 1011.7 9 29 SCT KSQI
W. CHICAGO/DU PA 72 72 100 150 at 3 29.9 6 CLR BR KDPA
396
FPUS63 KILX 110905
SFTIL
ILZ001>013-015>021-023>108-112200-
Tabular State Forecast for Illinois
National Weather Service Lincoln IL
405 AM CDT Tue Aug 11 2026
ROWS INCLUDE...
Daily predominant daytime weather 6AM-6PM
Forecast temperatures...early morning low/daytime high
Probability of precipitation nighttime 6PM-6AM/daytime 6AM-6PM
- indicates temperatures below zero
MM indicates missing data
FCST FCST FCST FCST FCST FCST FCST
Today Wed Thu Fri Sat Sun Mon
Aug 11 Aug 12 Aug 13 Aug 14 Aug 15 Aug 16 Aug 17
...Northwest IL...
Moline/Rock Island
Tstrms Shwrs Shwrs Tstrms Tstrms Tstrms Ptcldy
/88 70/86 70/82 66/79 66/84 70/83 66/79
/70 20/50 50/70 70/60 60/60 50/50 20/20
Sterling/Rock Falls
Tstrms Tstrms Shwrs Mocldy Tstrms Shwrs Ptcldy
/87 68/86 68/81 65/79 63/83 69/82 64/79
/80 20/60 50/70 70/30 70/70 60/60 20/20
...North central IL...
DeKalb
Tstrms Mocldy Tstrms Ptcldy Tstrms Shwrs Ptcldy
/83 67/83 67/80 63/78 63/79 67/81 63/78
/90 10/40 40/60 60/20 60/60 60/60 20/20
Rockford
Tstrms Ptcldy Shwrs Ptcldy Tstrms Shwrs Ptcldy
/83 66/83 66/80 63/78 62/80 67/80 62/78
/90 10/30 30/50 50/10 60/60 70/70 20/10
...Northeast IL...
Aurora
Tstrms Mocldy Tstrms Ptcldy Tstrms Shwrs Ptcldy
/82 68/83 68/80 65/78 64/80 68/81 64/78
/90 10/40 40/60 60/20 60/60 60/60 20/10
Chicago Downtown
Tstrms Mocldy Shwrs Ptcldy Tstrms Shwrs Ptcldy
/79 70/79 70/76 68/74 67/79 70/81 68/76
/90 20/40 30/50 50/10 50/60 60/60 20/10
Chicago O'Hare
Tstrms Mocldy Shwrs Ptcldy Tstrms Shwrs Ptcldy
/82 69/83 69/80 67/77 65/79 69/81 66/78
/90 10/40 30/50 50/10 50/60 60/60 20/10
Joliet
Tstrms Mocldy Tstrms Ptcldy Tstrms Shwrs Ptcldy
/84 69/85 69/81 67/79 65/81 70/84 66/79
/90 20/40 40/60 60/30 60/60 50/50 20/10
Kankakee
Tstrms Mocldy Tstrms Mocldy Tstrms Tstrms Ptcldy
/85 67/85 67/82 65/79 64/83 69/85 65/79
/80 20/30 50/60 60/40 50/50 50/50 30/20
Waukegan
Tstrms Ptcldy Mocldy Ptcldy Tstrms Shwrs Ptcldy
/77 67/77 67/77 64/74 63/76 66/79 63/75
/80 10/30 20/40 40/00 50/60 60/60 20/10
...West central IL...
Jerseyville
Ptcldy Sunny Tstrms Tstrms Sunny Sunny Ptcldy
/95 75/94 74/91 71/89 72/94 74/93 70/85
/10 20/20 50/50 60/60 10/10 10/10 30/30
Macomb
Ptcldy Tstrms Tstrms Tstrms Ptcldy Ptcldy Ptcldy
/90 71/88 70/83 67/81 68/88 71/85 66/79
/30 10/60 70/80 80/80 40/40 30/30 20/20
Quincy
Ptcldy Ptcldy Tstrms Tstrms Ptcldy Ptcldy Ptcldy
/94 76/93 74/89 71/87 73/94 75/90 69/82
/20 20/30 60/60 80/80 20/20 20/20 40/40
...Central IL...
Decatur
Ptcldy Ptcldy Shwrs Tstrms Ptcldy Ptcldy Ptcldy
/91 71/88 71/86 68/83 68/89 73/89 68/82
/30 30/40 70/70 80/80 30/30 20/20 20/20
LaSalle/Peru
Tstrms Tstrms Tstrms Shwrs Tstrms Shwrs Ptcldy
/86 70/85 70/81 67/79 66/84 71/84 66/79
/70 20/50 50/70 70/50 60/60 50/50 20/10
Peoria
Ptcldy Ptcldy Shwrs Tstrms Tstrms Ptcldy Ptcldy
/89 71/88 71/84 68/82 68/88 73/87 68/81
/30 20/40 70/70 80/80 50/50 30/30 30/20
Pontiac
Tstrms Tstrms Tstrms Shwrs Tstrms Ptcldy Ptcldy
/88 70/86 69/83 67/81 66/85 72/86 67/80
/70 30/50 60/70 70/60 60/60 40/40 30/20
Springfield
Ptcldy Ptcldy Tstrms Tstrms Ptcldy Ptcldy Ptcldy
/93 72/91 73/88 70/86 70/92 74/90 69/83
/20 20/40 70/70 80/80 30/30 20/20 30/30
...East central IL...
Champaign/Urbana
Ptcldy Ptcldy Tstrms Shwrs Ptcldy Ptcldy Ptcldy
/88 69/86 70/84 67/81 67/86 72/87 68/81
/40 30/40 60/60 70/70 40/40 20/20 30/20
Charleston/Mattoon
Ptcldy Ptcldy Shwrs Shwrs Sunny Sunny Ptcldy
/91 71/89 71/86 68/84 68/89 72/90 69/83
/20 40/40 60/60 70/70 30/30 10/10 30/30
...Southwest IL...
Belleville
Ptcldy Sunny Ptcldy Ptcldy Sunny Sunny Ptcldy
/98 78/98 77/96 75/93 75/98 77/98 74/88
/10 10/20 30/30 30/30 10/10 10/10 30/30
Chester
Sunny Sunny Ptcldy Ptcldy Sunny Sunny Ptcldy
/96 76/98 76/96 74/95 74/98 76/99 73/88
/10 10/10 20/20 10/10 10/10 00/00 20/20
...South central IL...
Carbondale
Sunny Sunny Ptcldy Ptcldy Sunny Sunny Ptcldy
/96 78/98 78/97 76/96 75/98 77/100 75/90
/10 10/20 20/20 10/10 10/00 00/00 10/20
Centralia
Ptcldy Sunny Ptcldy Tstrms Sunny Sunny Ptcldy
/96 76/96 76/93 74/91 73/95 76/96 73/87
/10 20/20 40/40 50/50 10/10 10/10 20/20
Mount Vernon
Sunny Sunny Ptcldy Ptcldy Sunny Sunny Ptcldy
/98 76/97 76/95 74/93 73/97 76/98 73/89
/20 20/30 40/40 40/40 10/10 00/00 20/20
...Southeast IL...
Lawrenceville
Ptcldy Ptcldy Tstrms Tstrms Sunny Sunny Ptcldy
/93 74/92 74/89 72/88 71/91 74/93 72/86
/20 40/30 60/60 60/60 10/10 10/10 30/30
$$