Frost Advisory for Champaign County ended Sunday morning
CHAMPAIGN - The National Weather Service Frost Advisory for Champaign County ended at 9 a.m. Sunday, Oct. 18, as scheduled. The advisory, first issued by the weather service's Lincoln office at 1:36 a.m. Saturday and later reissued, covered 1 a.m. to 9 a.m. Sunday and warned that temperatures as low as 34 degrees would produce frost.
As of Sunday afternoon, the weather service listed no active alerts for Champaign County (zone ILZ045), according to the National Weather Service active-alerts feed and the paper's weather endpoint.
While it was in effect, the advisory covered 19 counties in central, east-central and southeast Illinois, including Piatt, Vermilion, Douglas, McLean and Macon. The weather service's instruction at the time was: "Take steps now to protect tender plants from the cold."
Source: National Weather Service Frost Advisory (ended 9 a.m. CDT Oct. 18); active alerts for zone ILZ045; Champaign forecast (https://forecast.weather.gov/MapClick.php?lat=40.1164&lon=-88.2434).
Updated, Oct. 17, 2026: Update: This story has been updated with the National Weather Service's latest Champaign forecast. An earlier version said Saturday night's low would be around 36, with areas of frost before 8 a.m. Sunday and a Sunday high near 65. The updated forecast calls for a low around 35, widespread frost before 9 a.m. Sunday and a high near 66. The story also notes the advisory was reissued unchanged Saturday morning.
Updated, Oct. 18, 2026: Update: The Frost Advisory for Champaign County ended at 9 a.m. Sunday, Oct. 18, as scheduled. An earlier version described the advisory as in effect. The National Weather Service listed no active alerts for the county Sunday afternoon.