FPUS63 KILX 182105 SFTIL ILZ001>013-015>021-023>108-191000- Tabular State Forecast for Illinois National Weather Service Lincoln IL 405 PM 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 Tue Wed Thu Fri Sat Sun Mon May 19 May 20 May 21 May 22 May 23 May 24 May 25 ...Northwest IL... Moline/Rock Island Ptcldy Sunny Ptcldy Shwrs Ptcldy Ptcldy Ptcldy 66/73 48/66 44/68 48/67 52/76 56/82 60/86 70/40 00/00 00/10 30/70 60/20 20/20 20/20 Sterling/Rock Falls Ptcldy Sunny Ptcldy Shwrs Ptcldy Ptcldy Ptcldy 64/74 46/66 42/67 46/66 50/75 54/80 57/84 40/30 00/00 00/00 30/60 60/20 20/20 20/20 ...North central IL... DeKalb Ptcldy Ptcldy Ptcldy Shwrs Mocldy Ptcldy Ptcldy 66/77 46/62 41/63 45/65 49/73 53/78 55/82 40/30 10/00 00/00 20/50 50/30 20/20 20/20 Rockford Ptcldy Sunny Ptcldy Shwrs Mocldy Ptcldy Ptcldy 66/76 45/63 40/64 45/65 49/73 52/79 56/83 40/30 00/00 00/00 10/50 50/30 20/20 20/20 ...Northeast IL... Aurora Ptcldy Ptcldy Ptcldy Shwrs Mocldy Ptcldy Ptcldy 67/80 49/62 43/64 47/66 51/74 54/79 57/82 30/40 10/00 00/00 10/60 60/30 20/20 20/20 Chicago Downtown Ptcldy Ptcldy Ptcldy Shwrs Mocldy Ptcldy Ptcldy 68/84 50/57 46/61 50/65 53/71 56/76 59/80 30/40 30/00 00/00 10/60 60/40 30/30 20/20 Chicago O'Hare Tstrms Ptcldy Ptcldy Shwrs Mocldy Ptcldy Ptcldy 69/81 50/58 44/61 48/64 52/72 55/77 58/81 40/50 10/00 00/00 10/50 50/30 30/30 20/20 Joliet Tstrms Ptcldy Sunny Shwrs Mocldy Ptcldy Ptcldy 68/81 50/62 44/66 48/68 53/75 55/79 58/82 30/50 30/00 00/00 20/60 60/30 30/20 20/20 Kankakee Tstrms Ptcldy Sunny Shwrs Mocldy Ptcldy Ptcldy 68/83 50/62 42/67 47/69 53/76 55/79 57/82 30/50 60/10 00/00 10/60 60/30 20/20 20/20 Waukegan Ptcldy Ptcldy Ptcldy Mocldy Mocldy Ptcldy Ptcldy 67/81 46/55 42/57 46/61 49/68 52/73 55/78 40/20 10/00 00/00 10/40 50/40 20/20 20/20 ...West central IL... Jerseyville Tstrms Ptcldy Ptcldy Tstrms Mocldy Ptcldy Ptcldy 66/79 53/67 47/71 54/72 56/78 58/81 62/84 60/90 50/30 10/10 50/70 50/30 30/30 30/30 Macomb Shwrs Ptcldy Ptcldy Shwrs Mocldy Ptcldy Ptcldy 66/75 49/66 44/70 50/68 54/77 56/82 60/85 70/50 10/00 00/00 40/70 50/10 20/20 20/20 Quincy Tstrms Ptcldy Ptcldy Tstrms Mocldy Ptcldy Ptcldy 65/73 51/67 48/70 54/69 56/78 59/83 63/86 80/60 10/00 00/10 50/70 60/20 20/20 20/20 ...Central IL... Decatur Tstrms Ptcldy Ptcldy Tstrms Mocldy Ptcldy Ptcldy 68/81 54/67 45/69 52/70 57/76 59/80 62/83 60/90 50/20 10/10 30/70 50/20 30/30 20/30 LaSalle/Peru Ptcldy Ptcldy Sunny Shwrs Mocldy Ptcldy Ptcldy 68/79 50/66 43/68 49/68 53/76 56/80 59/84 30/30 10/00 00/00 20/60 60/20 20/20 20/20 Peoria Tstrms Ptcldy Ptcldy Shwrs Mocldy Ptcldy Ptcldy 69/78 51/68 45/71 51/70 55/77 58/82 61/85 50/60 30/00 00/00 30/70 50/20 20/20 20/20 Pontiac Tstrms Ptcldy Sunny Shwrs Mocldy Ptcldy Ptcldy 68/83 51/66 42/69 48/69 54/77 56/81 59/85 30/50 50/00 00/00 20/60 60/20 30/20 20/30 Springfield Tstrms Ptcldy Ptcldy Tstrms Mocldy Ptcldy Ptcldy 69/81 53/68 45/71 53/71 57/78 59/82 62/85 40/80 30/10 10/10 40/70 50/20 30/30 20/20 ...East central IL... Champaign/Urbana Tstrms Ptcldy Ptcldy Tstrms Mocldy Ptcldy Ptcldy 68/82 55/67 44/68 50/70 57/77 58/80 61/83 50/80 60/20 10/10 20/70 60/30 30/30 30/30 Charleston/Mattoon Tstrms Mocldy Ptcldy Tstrms Mocldy Ptcldy Ptcldy 69/82 57/67 46/68 53/70 59/77 60/80 63/82 90/90 60/50 10/10 40/70 60/30 30/30 30/30 ...Southwest IL... Belleville Tstrms Shwrs Ptcldy Tstrms Ptcldy Ptcldy Ptcldy 68/82 58/70 52/73 58/75 61/81 62/83 65/86 70/90 80/80 20/10 60/70 60/30 30/30 30/40 Chester Tstrms Shwrs Mocldy Tstrms Ptcldy Ptcldy Shwrs 68/84 58/69 53/73 57/76 60/80 60/82 63/84 40/90 80/60 20/20 70/80 80/40 40/40 40/50 ...South central IL... Carbondale Tstrms Shwrs Ptcldy Tstrms Tstrms Shwrs Tstrms 71/86 62/72 56/75 60/77 63/81 63/83 65/84 50/80 70/70 20/10 70/80 80/50 40/50 50/50 Centralia Tstrms Shwrs Ptcldy Tstrms Mocldy Ptcldy Ptcldy 69/84 60/70 52/72 57/75 62/80 63/82 65/84 70/80 80/70 10/10 60/80 70/30 30/30 40/40 Mount Vernon Tstrms Shwrs Ptcldy Tstrms Ptcldy Ptcldy Ptcldy 67/85 61/71 53/73 58/76 62/80 63/82 65/84 50/90 70/70 20/10 60/80 70/40 40/30 40/40 ...Southeast IL... Lawrenceville Tstrms Shwrs Ptcldy Tstrms Tstrms Ptcldy Shwrs 71/86 63/71 54/72 57/76 64/80 65/83 66/84 90/70 90/70 10/10 50/80 70/50 40/30 40/50 $$