Historical weather data, all-time temperature records, and monthly climate averages for Kankakee, IL. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 5 in Kankakee typically lands in that awkward shoulder season sweet spot — average highs of 53° and lows of 34°, with a 29% chance of rain keeping things honest. The date has seen a wild 62-degree swing across the record books, from a brutal 15° in 1995 to a shirt-sleeve 77° just two years ago in 2023.
Kankakee knows extremes. The thermometer has swung from a scorching 107° in August 1988 to a bone-cracking -29° in January 1985 — a 136-degree range that captures the full brutality of the Illinois interior. A single June day in 2012 dumped nearly 6 inches of rain, and a January 1979 storm buried the city under 13 inches of snow.
Summer is the headliner here — highs climb to 85° in mid-July and stay above 80° from June through August, making those months the clear picks for warm-weather plans. Winter bites hard, with January highs averaging just 30° during the coldest stretch of the year. If rain is your concern, dodge mid-June, when Kankakee averages over an inch of precipitation in a single week.