Tabular State Forecast
Issued by NWS
Issued by NWS
855
FPUS63 KILX 171605
SFTIL
ILZ001>013-015>021-023>108-172200-
Tabular State Forecast for Illinois
National Weather Service Lincoln IL
1105 AM CDT Mon Aug 17 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 Tue Wed Thu Fri Sat Sun
Aug 17 Aug 18 Aug 19 Aug 20 Aug 21 Aug 22 Aug 23
...Northwest IL...
Moline/Rock Island
Sunny Tstrms Ptcldy Sunny Sunny Sunny Ptcldy
/80 63/79 65/79 61/79 62/80 64/79 61/76
/00 00/50 60/00 00/00 10/20 50/30 10/10
Sterling/Rock Falls
Sunny Tstrms Ptcldy Sunny Ptcldy Ptcldy Ptcldy
/80 60/79 63/78 57/79 59/79 62/78 58/74
/00 00/60 60/00 00/00 10/20 40/30 10/00
...North central IL...
DeKalb
Ptcldy Ptcldy Ptcldy Sunny Ptcldy Ptcldy Ptcldy
/78 60/79 63/78 59/78 57/78 61/77 58/74
/00 00/40 60/30 00/00 10/30 40/40 20/10
Rockford
Sunny Tstrms Ptcldy Sunny Ptcldy Ptcldy Ptcldy
/81 60/79 62/78 58/79 58/79 61/77 58/75
/00 00/50 50/20 00/00 10/30 40/40 20/10
...Northeast IL...
Aurora
Ptcldy Ptcldy Ptcldy Sunny Ptcldy Ptcldy Ptcldy
/79 60/79 65/78 61/78 59/78 61/77 60/74
/10 10/30 70/40 10/00 10/20 30/30 30/10
Chicago Downtown
Ptcldy Ptcldy Ptcldy Sunny Ptcldy Ptcldy Ptcldy
/75 65/81 68/77 66/78 65/80 66/78 65/74
/20 10/30 70/40 00/00 00/20 30/30 30/10
Chicago O`Hare
Ptcldy Ptcldy Ptcldy Sunny Ptcldy Ptcldy Ptcldy
/78 64/81 66/79 64/79 62/81 64/79 63/75
/20 10/30 70/30 00/00 10/20 30/30 30/10
Joliet
Ptcldy Ptcldy Ptcldy Sunny Sunny Ptcldy Ptcldy
/79 62/80 66/79 62/79 60/79 63/78 61/75
/20 10/30 70/50 10/00 10/20 30/30 30/10
Kankakee
Ptcldy Ptcldy Shwrs Sunny Sunny Ptcldy Ptcldy
/78 60/80 66/78 60/78 58/79 61/78 60/75
/20 10/30 70/60 30/00 00/10 30/30 30/00
Waukegan
Ptcldy Tstrms Ptcldy Sunny Ptcldy Ptcldy Ptcldy
/76 62/80 64/76 62/77 61/79 62/77 60/73
/20 00/50 70/20 00/00 10/30 30/30 30/10
...West central IL...
Jerseyville
Sunny Sunny Tstrms Ptcldy Sunny Sunny Sunny
/83 61/85 67/82 64/82 61/84 64/84 61/81
/00 00/00 70/60 40/40 10/00 20/20 20/10
Macomb
Sunny Ptcldy Ptcldy Sunny Sunny Sunny Ptcldy
/79 61/80 65/78 61/78 61/80 63/79 60/76
/00 00/30 50/20 20/10 10/10 30/30 10/10
Quincy
Sunny Ptcldy Ptcldy Sunny Sunny Sunny Ptcldy
/81 65/83 68/80 65/81 65/83 67/82 64/80
/00 00/20 60/30 20/20 00/10 30/30 00/10
...Central IL...
Decatur
Sunny Ptcldy Tstrms Ptcldy Sunny Ptcldy Sunny
/81 60/82 66/80 62/80 60/81 62/81 60/78
/00 00/00 30/50 50/10 10/10 20/20 20/00
LaSalle/Peru
Ptcldy Ptcldy Ptcldy Sunny Sunny Ptcldy Ptcldy
/79 62/79 66/78 61/78 60/79 63/78 61/74
/00 00/30 60/50 10/00 10/20 40/30 20/10
Peoria
Sunny Ptcldy Ptcldy Sunny Sunny Sunny Sunny
/80 63/81 67/80 63/79 62/81 65/80 62/77
/00 00/10 30/10 10/00 00/10 40/30 20/00
Pontiac
Ptcldy Ptcldy Shwrs Sunny Sunny Ptcldy Ptcldy
/79 60/80 67/79 61/78 59/79 62/78 60/75
/00 00/30 60/60 20/00 00/20 30/30 30/00
Springfield
Sunny Ptcldy Mocldy Ptcldy Sunny Ptcldy Ptcldy
/82 62/84 67/81 64/81 62/83 64/82 62/80
/00 00/00 50/40 40/20 10/10 30/20 20/10
...East central IL...
Champaign/Urbana
Sunny Ptcldy Mocldy Sunny Sunny Ptcldy Ptcldy
/80 60/81 66/79 61/79 59/80 62/80 60/77
/00 00/00 20/40 40/10 00/10 20/30 30/00
Charleston/Mattoon
Ptcldy Ptcldy Tstrms Ptcldy Sunny Sunny Sunny
/81 60/82 66/81 63/80 60/82 62/82 60/79
/10 00/00 40/70 70/40 10/00 20/20 20/00
...Southwest IL...
Belleville
Ptcldy Sunny Tstrms Shwrs Sunny Sunny Ptcldy
/84 65/88 70/85 68/83 65/85 67/86 65/83
/10 00/00 70/60 70/70 10/00 10/10 10/10
Chester
Ptcldy Sunny Tstrms Tstrms Sunny Sunny Sunny
/85 63/87 68/85 66/82 64/84 65/86 63/82
/10 00/00 50/60 80/80 20/10 10/10 10/10
...South central IL...
Carbondale
Ptcldy Sunny Tstrms Tstrms Sunny Sunny Sunny
/87 64/88 68/87 68/84 65/86 65/87 64/84
/00 00/00 50/60 80/80 50/10 10/10 10/00
Centralia
Ptcldy Sunny Shwrs Shwrs Sunny Sunny Sunny
/84 62/85 68/84 66/82 63/84 64/85 63/81
/10 00/00 60/70 70/70 20/00 20/20 20/10
Mount Vernon
Ptcldy Sunny Shwrs Tstrms Sunny Sunny Sunny
/85 62/86 67/85 66/83 63/85 64/86 62/83
/00 00/00 50/70 70/70 40/00 20/20 10/00
...Southeast IL...
Lawrenceville
Ptcldy Sunny Tstrms Shwrs Sunny Sunny Sunny
/85 62/84 67/83 66/83 63/84 64/85 62/82
/20 00/00 20/70 60/60 10/10 10/20 20/00
$$