Historical weather data, all-time temperature records, and monthly climate averages for Highland Park, IL. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 5 in Highland Park sits squarely in the heart of spring's unpredictability — the average high of 54° sounds pleasant, but this date has swung anywhere from a brutal 21° low in 2002 to a 76° high in 2005. A 38% chance of precipitation is worth watching, though snow is off the table.
Highland Park earns its Midwest stripes with a 125-degree spread between its all-time records: a scorching 104° in July 2012 and a bone-chilling -21° in January 2019. A single day in June 2013 dropped 4.53 inches of rain, a reminder of how intense Lake Michigan-area storms can get.
Summer is the clear sweet spot, with highs peaking around 84-85° in mid-July, while mid-January bottoms out at a frigid average high of just 30°. June through early July is the wettest stretch of the year, averaging over an inch of precipitation per week — pack accordingly if you're visiting then.