Historical weather data, all-time temperature records, and monthly climate averages for Gurnee, IL. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 5 in Gurnee sits right on the edge of winter's last stand — the average low is still a freezing 32°, though highs can reach the low 50s. This date has seen wild swings over 82 years of records, from a balmy 76° in 1991 to a brutal 16° in 1982. There's a 38% chance of rain today, with a small but real 4% shot at snow.
Gurnee's weather has real teeth at both extremes — the thermometer has swung from a scorching 105° on July 4, 2012, to a deadly -31° on January 16, 1982, a range of 136 degrees. The area can also get hammered by precipitation, with a single day dropping 5.66 inches of rain in October 1965 and 16.8 inches of snow in a single February 2011 storm.
Mid-July is peak summer here, with average highs of 81° during the warmest week of the year, while mid-January bottoms out at a frigid 29°. If you're visiting, May through September offers the most comfortable stretch, with June and July also being the wettest months. Winter runs long — highs don't reliably climb back above 50° until late April.