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 Sun Oct 04 at 09:00 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 48 46 93 at 3 30.21 10 CLR KALN
AURORA MUNICIPAL 52 48 87 0 at 0 30.15 1021.2 8 CLR KARR
BLOOMINGTON/NORM 54 48 82 220 at 5 30.2 1022.2 10 CLR KBMI
CAHOKIA/ST. LOUI 47 47 100 0 at 0 30.2 2 CLR BR KCPS
CAIRO 60 58 92 0 at 0 30.17 10 CLR KCIR
CENTRALIA 45 45 100 0 at 0 30.19 1 7 VV BR KENL
CHAMPAIGN/URBANA 52 48 86 0 at 0 30.19 1022.5 7 CLR KCMI
CHICAGO NEXRAD 54 50 88 260 at 6 30.16 10 CLR KLOT
CHICAGO/LANSING 48 45 87 190 at 4 30.15 10 CLR KIGQ
CHICAGO/MIDWAY 55 48 77 250 at 8 30.14 1020.5 10 CLR KMDW
CHICAGO/O'HARE A 56 47 72 250 at 8 30.13 1020.3 10 CLR KORD
CHICAGO/PALWAUKE 55 46 72 290 at 4 30.15 10 110 BKN KPWK
CHICAGO/WAUKEGAN 55 48 77 270 at 6 30.12 1019.7 10 CLR KUGN
DE KALB 54 46 77 280 at 7 30.15 10 CLR KDKB
DECATUR AIRPORT 50 48 93 0 at 0 30.2 1022.7 10 CLR KDEC
EFFINGHAM 46 44 94 0 at 0 30.2 10 CLR K1H2
FAIRFIELD 50 48 93 0 at 0 30.18 10 CLR KFWC
FLORA 48 0 at 0 30.19 10 CLR KFOA
FREEPORT 52 50 94 260 at 6 30.17 10 CLR KFEP
GALESBURG MUNICI 46 46 100 0 at 0 30.19 10 CLR KGBG
GREATER KANKAKEE 47 45 95 0 at 0 30.17 10 CLR KIKK
HARRISBURG 52 52 100 0 at 0 30.18 10 CLR KHSB
JACKSONVILLE 45 45 100 0 at 0 30.19 10 CLR KIJX
JOLIET PARK DIST 48 48 100 0 at 0 30.16 10 CLR KJOT
LACON/MARSHALL C 51 49 93 0 at 0 30.16 10 CLR KC75
LAWRENCEVILLE-VI 52 48 87 0 at 0 30.19 1022.3 10 CLR KLWV
LITCHFIELD 46 43 87 0 at 0 30.21 10 CLR K3LF
MACOMB 46 46 100 240 at 4 30.2 10 CLR KMQB
MARION REGIONAL 55 54 94 0 at 0 30.19 10 100 BKN KMWA
MATTOON/CHARLEST 50 48 93 0 at 0 30.19 1022.2 10 CLR KMTO
METROPOLIS_MUNIC 58 57 97 330 at 3 30.17 10 CLR KM30
MOLINE/QUAD CITY 50 48 93 0 at 0 30.18 1022.2 10 CLR KMLI
MOUNT VERNON (AW 46 46 100 0 at 0 30.2 10 2 FEW KMVN
MOUNT_CARMEL 50 50 100 0 at 0 30.19 10 CLR KAJG
OLNEY-NOBLE 47 47 100 0 at 0 30.19 10 CLR KOLY
PARIS 43 42 97 0 at 0 30.19 10 CLR KPRG
PEORIA REGIONAL 52 48 87 230 at 3 30.18 1022.1 10 CLR KPIA
PITTSFIELD 52 45 76 270 at 4 30.2 10 CLR KPPQ
PONTIAC 45 45 100 0 at 0 30.17 10 CLR KPNT
QUINCY MUNI/BALD 52 48 87 230 at 3 30.2 1022.4 10 CLR KUIN
RANTOUL/FRANK EL 45 45 99 0 at 0 30.19 10 CLR KTIP
ROBINSON_MUNI_AR 45 45 100 310 at 1 30.18 0.8 5 VV BR KRSV
ROCHELLE MUNI AI 44 44 100 250 at 4 30.16 10 CLR KRPJ
ROCKFORD 50 46 87 0 at 0 30.17 1022.0 10 250 FEW KRFD
SALEM-LECKRONE 48 47 96 at 30.19 10 CLR KSLO
SAVANNA/TRI-TOWN 48 46 93 160 at 3 30.16 10 CLR KSFY
SCOTT AFB/BELLEV 50 50 100 0 at 0 30.17 1021.9 10 CLR KBLV
SPARTA 52 52 100 0 at 0 30.21 10 CLR KSAR
SPRINGFIELD/CAPI 48 46 93 0 at 0 30.21 1022.9 10 CLR KSPI
STERLING ROCKFAL 52 48 87 0 at 0 30.18 1022.1 10 CLR KSQI
W. CHICAGO/DU PA 54 48 82 230 at 4 30.16 1021.6 10 CLR KDPA
805
FPUS63 KILX 040905
SFTIL
ILZ001>013-015>021-023>108-042200-
Tabular State Forecast for Illinois
National Weather Service Lincoln IL
405 AM CDT Sun Oct 4 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 Mon Tue Wed Thu Fri Sat
Oct 04 Oct 05 Oct 06 Oct 07 Oct 08 Oct 09 Oct 10
...Northwest IL...
Moline/Rock Island
Sunny Sunny Sunny Sunny Sunny Sunny Sunny
/73 46/68 49/73 55/74 51/72 53/72 55/76
/00 00/00 00/00 00/00 00/10 10/10 00/00
Sterling/Rock Falls
Sunny Sunny Sunny Sunny Sunny Sunny Sunny
/72 44/67 46/72 53/73 48/71 50/71 52/76
/00 00/00 00/00 00/00 00/10 10/10 00/00
...North central IL...
DeKalb
Sunny Sunny Sunny Sunny Ptcldy Sunny Sunny
/70 42/65 44/70 53/72 48/70 49/69 50/74
/00 00/00 00/00 00/00 00/10 10/00 00/00
Rockford
Sunny Sunny Sunny Sunny Sunny Sunny Sunny
/69 41/65 45/70 52/72 47/69 49/69 50/74
/00 00/00 00/00 00/00 00/10 10/10 00/00
...Northeast IL...
Aurora
Sunny Sunny Sunny Sunny Sunny Sunny Sunny
/71 43/66 43/70 53/73 48/70 50/70 51/73
/00 00/00 00/00 00/00 00/10 00/10 00/00
Chicago Downtown
Sunny Sunny Sunny Sunny Sunny Sunny Sunny
/70 51/64 50/68 56/70 54/67 54/65 55/70
/00 00/00 00/00 00/00 00/10 00/00 00/00
Chicago O'Hare
Sunny Sunny Sunny Sunny Sunny Sunny Sunny
/70 47/66 48/69 55/72 51/69 52/68 52/72
/10 00/00 00/00 00/00 00/10 00/00 00/00
Joliet
Sunny Sunny Sunny Sunny Sunny Sunny Sunny
/72 44/67 44/71 55/74 50/71 52/71 52/75
/00 00/00 00/00 00/00 00/10 10/10 00/00
Kankakee
Sunny Sunny Sunny Sunny Sunny Sunny Sunny
/73 44/68 43/72 54/75 49/73 51/72 51/77
/00 00/00 00/00 00/00 00/10 00/10 00/00
Waukegan
Sunny Sunny Sunny Sunny Ptcldy Sunny Sunny
/68 45/62 45/69 52/70 48/67 49/65 51/68
/10 00/00 00/00 00/00 00/00 00/00 00/00
...West central IL...
Jerseyville
Sunny Sunny Sunny Sunny Sunny Sunny Sunny
/79 47/74 46/78 54/83 52/82 54/83 56/85
/00 00/00 00/00 00/00 00/20 20/00 00/00
Macomb
Sunny Sunny Sunny Sunny Sunny Sunny Sunny
/75 46/70 46/74 55/76 51/74 53/75 55/79
/00 00/00 00/00 00/00 00/20 20/10 00/00
Quincy
Sunny Sunny Sunny Sunny Sunny Sunny Sunny
/75 49/71 50/76 58/78 55/77 57/77 60/81
/00 00/00 00/00 00/00 00/20 20/00 00/00
...Central IL...
Decatur
Sunny Sunny Sunny Sunny Sunny Sunny Sunny
/78 46/73 45/77 53/81 51/79 53/80 54/83
/00 00/00 00/00 00/00 00/10 20/00 00/00
LaSalle/Peru
Sunny Sunny Sunny Sunny Sunny Sunny Sunny
/72 44/68 46/72 54/75 49/72 51/72 52/77
/00 00/00 00/00 00/00 00/10 10/00 00/00
Peoria
Sunny Sunny Sunny Sunny Sunny Sunny Sunny
/75 48/69 48/73 56/76 52/74 54/74 56/78
/00 00/00 00/00 00/00 00/00 10/10 00/00
Pontiac
Sunny Sunny Sunny Sunny Sunny Sunny Sunny
/74 44/69 44/73 54/76 49/74 51/74 52/78
/00 00/00 00/00 00/00 00/00 00/00 00/00
Springfield
Sunny Sunny Sunny Sunny Sunny Sunny Sunny
/79 47/73 46/77 56/81 52/80 55/80 57/83
/00 00/00 00/00 00/00 00/20 20/00 00/00
...East central IL...
Champaign/Urbana
Sunny Sunny Sunny Sunny Sunny Sunny Sunny
/77 47/71 44/75 53/79 51/78 52/78 53/81
/00 00/00 00/00 00/00 00/00 10/00 00/00
Charleston/Mattoon
Sunny Sunny Sunny Sunny Sunny Sunny Sunny
/80 46/73 44/77 51/82 50/80 52/82 53/83
/00 00/00 00/00 00/00 00/00 20/00 00/00
...Southwest IL...
Belleville
Sunny Sunny Sunny Sunny Sunny Sunny Sunny
/80 52/75 48/79 57/84 56/83 57/85 59/86
/00 00/00 00/00 00/00 00/00 00/00 00/00
Chester
Sunny Sunny Sunny Sunny Sunny Sunny Ptcldy
/80 52/75 46/78 52/84 54/83 54/84 56/84
/00 00/00 00/00 00/00 00/00 00/00 00/00
...South central IL...
Carbondale
Sunny Sunny Sunny Sunny Sunny Sunny Ptcldy
/79 52/74 47/77 50/83 53/82 54/83 56/83
/00 00/00 00/00 00/00 00/00 00/00 00/00
Centralia
Sunny Sunny Sunny Sunny Sunny Sunny Sunny
/80 50/75 46/79 52/84 53/83 54/84 56/86
/00 00/00 00/00 00/00 00/00 00/00 00/00
Mount Vernon
Sunny Sunny Sunny Sunny Sunny Sunny Sunny
/81 50/76 45/79 51/84 52/83 53/85 55/86
/00 00/00 00/00 00/00 00/00 00/00 00/00
...Southeast IL...
Lawrenceville
Sunny Sunny Sunny Sunny Sunny Sunny Sunny
/79 50/73 46/76 51/83 52/81 53/82 55/83
/00 00/00 00/00 00/00 00/00 20/20 00/00
$$