Weather
Central Illinois Weather Alert: Damaging Winds Before Weekend Chill Oct 16=17
SPRINGFIELD, IL – Central Illinois is preparing for a dramatic weather shift this week as record breaking October heat gives way to multiple rounds of thunderstorms, a potential severe weather threat
By Evan Cross · 2026-10-12T17:52:44.785Z
SPRINGFIELD, IL – Central Illinois is preparing for a dramatic weather shift this week as record breaking October heat gives way to multiple rounds of thunderstorms, a potential severe weather threat and temperatures cold enough to produce frost by the weekend.
According to the National Weather Service in Lincoln, temperatures near 90 degrees will continue through Tuesday, Oct. 13, before a stalling cold front brings showers and thunderstorms Tuesday night through Thursday night.
Tuesday's highs are forecast to reach 85 to 94 degrees across central Illinois, unusually hot conditions for mid October.
Severe Storms Possible Tuesday Night
Forecasters have identified Tuesday night as the primary period of concern, with a Marginal Risk for severe thunderstorms, particularly west of Interstate 55.
Some thunderstorms could produce strong to damaging wind gusts and locally heavy rainfall.
Rain chances increase to approximately 70% Tuesday night, followed by widespread showers Wednesday and additional thunderstorms Thursday.
Wednesday temperatures are expected to range from 73 to 85 degrees, while Thursday highs could reach 69 to 82 degrees.
The National Weather Service forecasts rain chances reaching 80% Wednesday and 90% Thursday.
Sharp Temperature Drop and Frost Potential
Following the cold front, significantly cooler Canadian air will move into central Illinois.
By Friday, Oct. 16, afternoon temperatures are expected to fall into the upper 50s and 60s, with similar conditions Saturday.
Friday night temperatures could plunge into the 30s, with forecast lows between 36 and 41 degrees.
The National Weather Service warns that widespread frost potential could develop Friday and Saturday nights as colder air settles across the region.
Residents with sensitive outdoor plants should monitor overnight temperatures, while drivers should prepare for potentially hazardous conditions during periods of heavy rain and thunderstorms.
The forecast remains subject to change, particularly regarding the timing and severity of storms.
Residents are encouraged to monitor National Weather Service updates throughout the week.