Springfield, Illinois — A mix of spring rain and an incoming cold snap is set to impact central Illinois today, bringing scattered showers this afternoon followed by a noticeable temperature drop overnight that could lead to patchy frost in several areas by early Friday morning.
According to the National Weather Service office in Lincoln, rain chances will increase through the afternoon and evening, with a 40 to 60 percent likelihood of showers across the region. While rainfall amounts are expected to remain relatively light, brief downpours and gusty winds could create minor travel disruptions, especially along major routes like Interstate 55, Interstate 72, and Interstate 74.
By late evening, conditions will begin to shift as colder air moves in. Overnight temperatures are expected to fall into the mid- to upper-30s, particularly in areas north and west of the Illinois River. Cities such as Peoria, Galesburg, and Bloomington are likely to see the greatest drop, increasing the chances of patchy frost forming before sunrise on Friday.
The chill will not be short-lived. Forecast models indicate a more widespread frost risk developing Friday night as temperatures once again dip into the mid-30s across much of central Illinois. This could extend into early Saturday morning, especially impacting eastern parts of the state.
During the day today, cities including Springfield, Decatur, Champaign, and Jacksonville can expect relatively mild conditions, with highs ranging from the upper 50s to mid-60s. However, the contrast between daytime warmth and nighttime cold will remain a key feature heading into the weekend.
Residents are being urged to take simple precautions, particularly those with gardens or sensitive plants. Covering vegetation or bringing plants indoors before midnight can help prevent damage from frost. Drivers should also remain cautious during periods of heavier showers this afternoon, as sudden wind gusts may briefly reduce visibility.
Officials say the weather pattern will continue to evolve, with further updates expected as the extent of frost coverage becomes clearer over the next 24 hours.
