Winter Weather Forecast 2025 2025 Illinois. Illinois — warmer than normal temperatures and colder than normal temperatures have an equal chance of happening this winter in illinois, according to a new. Noaa just released its 2025/2025 long lead seasonal outlook for winter.

Noaa just released its 2025/2025 long lead seasonal outlook for winter. Illinois — warmer than normal temperatures and colder than normal temperatures have an equal chance of happening this winter in illinois, according to a new.