Historical weather data, all-time temperature records, and monthly climate averages for Antioch, IL. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 4 in Antioch runs cold, with an average high of just 52° and lows that can still dip to freezing. The date has seen a 53-degree swing in its history — from a bitter 23° in 2002 to a shirt-sleeve 76° in 2010. There's a 43% chance of rain today, but snow is off the table.
Antioch's weather has real range — this is a place that has baked at 106° in July 2012 and plunged to -28° in January 2019, a jaw-dropping 134-degree spread. The wettest single day on record dropped 3.84 inches on June 12, 2000.
Summers are warm but not brutal, peaking in the third week of July with average highs around 84°. Winters are genuinely cold — mid-January averages just 28° for a high. If you're watching for rain, late spring is the wet season, with the first two weeks of May averaging over an inch of precipitation.