It has been an abnormally warm stretch across much of the country to start the fall season, with many days seeing highs well into the 80s. But some big changes are on the way, as cooler air from the North will surge over the Great Lakes region over the next few days.
The initial push of cooler air comes with strong winds from the Northwest especially Sunday afternoon. Winds could gust to 35 mph at times, making for a downright chilly and windy day.
High temperatures the next few days in Rockford will be well below average, only reaching the 50s and low 60s through mid-week. It will be a cool and windy day Sunday with isolated showers and highs in the low 60s. Monday and Tuesday are cooler with highs only in the 50s, but gradually drier conditions develop with high pressure moving in.
That high pressure will also limit the winds for a few of the overnights. This will allow for at least patchy frost if not a legitimate freeze some nights. On average, Rockford sees its first fall freeze October 13th, so we won't be too far off that. Tuesday night will be the coolest overnight low with the core of the high pressure directly overhead. Many locations in Northern Illinois will see similar temperatures, outside of Chicago in their urban heat island. Be sure to have a plan to protect any sensitive plants or vegetation this week!
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