Historical weather data, all-time temperature records, and monthly climate averages for North Chicago, IL. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 5th in North Chicago is a day of transition — expect a high around 54° and a low near 35°, with almost a coin-flip chance of rain at 38%. The date has seen wild swings over the years, from a balmy 76° in 2005 to a bitter 21° low back in 2002.
North Chicago doesn't mess around at the extremes — the thermometer has touched 104° in July 2012 and plunged to -21° in the brutal January of 2019, a swing of 125 degrees. A single day in June 2013 dumped 4.53 inches of rain, a reminder of how hard Lake Michigan's neighborhood can get hit.
Summer is the clear sweet spot, with highs peaking around 84-85° in mid-July before a gradual slide into fall. January and February are genuinely cold, with average highs barely cracking the low 30s. If you're watching the rain, late June through early July is the wettest stretch of the year.