FPUS63 KILX 181605 SFTIL ILZ001>013-015>021-023>108-182200- Tabular State Forecast for Illinois National Weather Service Lincoln IL 1105 AM CDT Mon May 18 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 May 18 May 19 May 20 May 21 May 22 May 23 May 24 ...Northwest IL... Moline/Rock Island Tstrms Shwrs Sunny Ptcldy Shwrs Ptcldy Ptcldy /80 66/75 48/66 44/68 48/67 52/76 55/82 /80 70/50 00/00 00/10 30/70 60/20 20/20 Sterling/Rock Falls Tstrms Ptcldy Sunny Ptcldy Shwrs Ptcldy Ptcldy /81 64/76 46/66 42/67 46/66 50/75 54/80 /80 50/40 00/00 00/00 30/60 60/20 20/20 ...North central IL... DeKalb Tstrms Tstrms Ptcldy Ptcldy Shwrs Mocldy Ptcldy /82 63/77 46/62 41/63 45/65 49/73 53/78 /60 60/50 10/00 00/00 20/50 50/30 20/20 Rockford Tstrms Shwrs Sunny Ptcldy Shwrs Mocldy Ptcldy /83 64/76 45/63 40/64 45/65 49/74 52/79 /70 60/60 00/00 00/00 10/50 50/30 20/20 ...Northeast IL... Aurora Tstrms Tstrms Ptcldy Ptcldy Shwrs Mocldy Ptcldy /83 65/80 49/62 43/64 47/66 51/74 54/79 /80 50/50 00/00 00/00 10/60 60/30 20/20 Chicago Downtown Tstrms Tstrms Ptcldy Ptcldy Shwrs Mocldy Ptcldy /86 68/84 50/57 46/61 50/65 54/71 56/76 /70 40/60 10/00 00/00 10/60 60/40 30/30 Chicago O'Hare Tstrms Tstrms Ptcldy Ptcldy Shwrs Mocldy Ptcldy /85 67/81 50/58 44/61 48/64 52/72 55/77 /70 40/50 10/00 00/00 10/60 60/30 30/30 Joliet Tstrms Tstrms Ptcldy Sunny Shwrs Mocldy Ptcldy /84 66/81 50/62 44/66 48/68 53/75 55/79 /90 50/70 10/00 00/00 20/60 60/30 30/20 Kankakee Tstrms Tstrms Ptcldy Sunny Shwrs Mocldy Ptcldy /84 65/83 50/62 42/67 47/69 53/75 55/79 /100 30/80 20/10 00/00 10/60 60/20 20/20 Waukegan Tstrms Shwrs Ptcldy Ptcldy Mocldy Mocldy Ptcldy /84 64/81 46/55 42/57 46/61 49/68 52/73 /50 50/50 00/00 00/00 10/40 50/40 20/20 ...West central IL... Jerseyville Tstrms Tstrms Ptcldy Ptcldy Tstrms Mocldy Ptcldy /75 66/81 53/67 47/71 54/72 57/78 58/81 /100 60/90 50/30 10/10 50/70 50/30 30/30 Macomb Tstrms Shwrs Ptcldy Ptcldy Shwrs Mocldy Ptcldy /77 66/77 49/66 44/70 50/68 54/77 56/82 /80 70/50 10/00 00/00 40/70 50/10 20/20 Quincy Tstrms Tstrms Ptcldy Ptcldy Tstrms Mocldy Ptcldy /78 65/77 51/67 48/70 54/69 56/78 59/83 /100 70/50 10/00 00/10 50/70 60/20 20/20 ...Central IL... Decatur Tstrms Tstrms Ptcldy Ptcldy Tstrms Mocldy Ptcldy /78 68/82 54/67 45/69 52/70 57/76 59/80 /90 40/90 50/20 10/10 30/70 50/20 30/30 LaSalle/Peru Tstrms Tstrms Ptcldy Sunny Shwrs Ptcldy Ptcldy /83 67/79 50/66 43/68 49/68 53/76 56/80 /100 60/60 20/00 00/00 20/60 60/30 20/20 Peoria Tstrms Tstrms Ptcldy Ptcldy Shwrs Ptcldy Ptcldy /76 68/80 51/68 45/71 51/70 55/77 58/82 /90 50/60 30/00 00/00 30/70 50/20 20/20 Pontiac Tstrms Tstrms Ptcldy Sunny Shwrs Mocldy Ptcldy /84 67/83 51/66 42/69 48/69 54/77 56/81 /100 40/90 20/00 00/00 20/60 60/20 30/20 Springfield Tstrms Tstrms Ptcldy Ptcldy Tstrms Mocldy Ptcldy /77 68/82 53/68 45/71 53/71 57/78 59/82 /90 40/80 30/10 10/10 40/70 50/20 30/30 ...East central IL... Champaign/Urbana Tstrms Tstrms Ptcldy Ptcldy Tstrms Mocldy Ptcldy /80 67/83 55/67 44/68 50/70 57/77 59/80 /90 40/80 60/20 10/10 20/70 50/30 30/30 Charleston/Mattoon Tstrms Tstrms Mocldy Ptcldy Tstrms Mocldy Ptcldy /81 69/82 57/67 46/68 53/70 59/77 61/80 /90 70/90 60/50 10/10 40/70 60/30 30/30 ...Southwest IL... Belleville Tstrms Tstrms Shwrs Ptcldy Tstrms Ptcldy Ptcldy /78 67/86 58/70 52/73 58/75 61/81 62/83 /90 50/90 80/80 20/10 60/70 60/30 30/40 Chester Tstrms Tstrms Shwrs Mocldy Tstrms Ptcldy Ptcldy /86 68/86 58/69 53/73 57/76 60/80 61/82 /60 30/90 80/60 20/20 70/80 80/40 40/40 ...South central IL... Carbondale Tstrms Tstrms Shwrs Ptcldy Tstrms Tstrms Shwrs /85 72/87 62/72 56/75 60/77 63/81 63/82 /60 50/80 70/70 20/10 70/80 80/60 50/50 Centralia Tstrms Tstrms Shwrs Ptcldy Tstrms Mocldy Ptcldy /82 68/86 60/70 52/72 57/75 62/80 63/82 /80 50/80 80/70 10/10 60/80 70/30 30/30 Mount Vernon Tstrms Tstrms Shwrs Ptcldy Tstrms Ptcldy Ptcldy /84 71/87 61/71 53/73 58/76 62/81 63/82 /70 50/90 70/70 20/10 60/80 70/40 40/30 ...Southeast IL... Lawrenceville Tstrms Tstrms Shwrs Ptcldy Tstrms Tstrms Ptcldy /85 70/87 63/71 54/72 57/76 64/80 64/82 /80 70/70 90/70 10/10 50/80 70/60 50/30 $$