Historical weather data, all-time temperature records, and monthly climate averages for Libertyville, IL. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 4th in Libertyville is classic early spring: expect a high around 53° and a low dipping to 35°, with nearly even odds (45%) of seeing some rain. The range on this date has been wild — a balmy 76° back in 2010, and a teeth-chattering 25° low in 2002.
Libertyville earns its Midwest stripes with a 125-degree swing between its all-time extremes — a scorching 104° in July 2012 and a brutal -21° in January 2019. A single June day in 2013 dumped 4.53 inches of rain, a reminder that summer storms here don't mess around.
Summer is the sweet spot, peaking the week of July 16–22 with average highs of 85°, while mid-January bottoms out around 30°. Late June through early July is the wettest stretch of the year, averaging over an inch of precipitation per week. Spring and fall offer pleasant shoulder seasons, with April and October averaging highs in the upper 50s to low 60s.