Weather
Champaign, IL Weather Oct. 13-18: Storms, Then Frost Risk
Champaign, IL – A major weather shift is heading toward Champaign and surrounding Champaign County communities as unusually warm October temperatures give way to multiple rounds of thunderstorms, foll
By Sophie Caldwell · 2026-10-13T18:29:46.033Z
Champaign, IL – A major weather shift is heading toward Champaign and surrounding Champaign County communities as unusually warm October temperatures give way to multiple rounds of thunderstorms, followed by a sharp cooldown and the possibility of frost this weekend.
According to the National Weather Service in Central Illinois, record warmth continues Tuesday, Oct. 13, with afternoon highs reaching the 80s to near 90 degrees across parts of the region. A cold front will bring showers and thunderstorms Tuesday night through Thursday night, Oct. 15.
Storms Expected Tuesday Night Through Thursday
Thunderstorm chances increase Tuesday night, with an 80% rain probability in the regional forecast. Some storms could become severe, particularly west of Interstate 57.
Wednesday, Oct. 14, brings additional showers and thunderstorms, with regional highs between 69 and 82 degrees. Rain chances remain near 80%, with the highest probabilities along and south of Interstate 72.
Thursday, Oct. 15, brings another round of thunderstorms, with highs ranging from 68 to 83 degrees. The National Weather Service warns that a few strong to severe storms are possible.
Heavy downpours, lightning and reduced visibility could create hazardous driving conditions along I 57, I 72 and local roads around Champaign Urbana.
Temperatures Plunge as Frost Threat Develops
By Friday, Oct. 16, much cooler air arrives, dropping regional afternoon highs into the 50s and lower 60s.
Friday night temperatures could fall between 34 and 40 degrees, creating the potential for patchy frost.
Saturday, Oct. 17, brings mostly sunny skies and highs near 59 to 63 degrees, followed by another chilly night with lows between 35 and 42 degrees.
Patchy frost remains possible Saturday night into Sunday morning, Oct. 18.
Residents should monitor updated forecasts, secure sensitive outdoor plants and prepare for rapidly changing conditions through the weekend.