Historical weather data, all-time temperature records, and monthly climate averages for Warrenville, IL. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 4 in Warrenville sits squarely in the unpredictable heart of spring — historically, highs range from a frigid 23° to a pleasant 76°, so the 54° average tells only part of the story. Expect a roughly 4-in-10 shot at rain, though snow is essentially off the table at this point in the season.
Warrenville plays in the extremes: the thermometer has swung from a brutal -29° on January 31, 2019 to a scorching 100° on July 24, 2005 — a 129-degree spread that captures the full drama of Midwest weather. The wettest single day on record dropped 6.02 inches on September 13, 2008, a reminder that late-summer rain events here can be serious.
Summer is the sweet spot, with highs peaking around 85° during the week of July 16–22, while January bottoms out at a raw 28° average high. If you're planning around rain, dodge mid-May — the week of May 7–13 is the wettest of the year, averaging 1.35 inches of precipitation.