Historical weather data, all-time temperature records, and monthly climate averages for Chesterton, IN. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 5th in Chesterton runs cool, with an average high of just 50° and a low around 35°. The date has seen a wild range over 36 years of records — from a balmy 77° in 1997 down to a bitter 20° in 2018. There's about a 1-in-3 chance of rain today, but snow is essentially off the table.
Chesterton earns its Midwest stripes with a staggering 124-degree spread between its all-time records — 102° on July 31, 1999 and -22° on January 31, 2019. The wettest single day on record dumped 7.76 inches in August 1990, and a February 2011 snowstorm piled up 15.4 inches in one shot.
Summer is the sweet spot here, peaking the week of July 16–22 with average highs of 83°. Winters are genuinely cold — January highs average just 30°–32°, so pack accordingly if you're visiting between December and February. If you're hoping to stay dry, avoid early-to-mid September, which is Chesterton's wettest stretch of the year.