Chicago, IL – Residents across northern Illinois woke up to an unseasonably cold start Friday morning, with temperatures plunging into the upper 20s and low 30s, bringing widespread frost and even a record-breaking low in parts of the region.
According to the US National Weather Service Chicago, Rockford Airport recorded a low of 27 degrees early Friday, marking a record for May 7. Several surrounding communities, including Machesney Park and Sugar Grove, also saw temperatures dip into the upper 20s, while suburbs like Batavia, Lombard, and Hoffman Estates hovered around 31 degrees.
The coldest conditions were reported outside the immediate Chicago metro area, where calmer winds and clearer skies allowed temperatures to fall more sharply overnight. Within the city, readings were slightly warmer, with O’Hare Airport at 37 degrees and Midway Airport at 36 degrees. Northerly Island recorded 42 degrees, highlighting the moderating effect of Lake Michigan.
The unusually chilly conditions led to frost formation across grassy and elevated surfaces, particularly in outlying and rural areas. Early morning photos shared by the National Weather Service showed visible frost accumulation, a rare sight for early May.
Meteorologists say this cold snap is short-lived, with temperatures expected to rebound later today and into the weekend. However, the brief drop serves as a reminder that late-season cold spells can still impact the region, especially for gardeners and farmers.
Residents are advised to monitor local forecasts and take precautions during sudden temperature swings this spring.
