Historical weather data, all-time temperature records, and monthly climate averages for South Shore, IL. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 4th in South Shore runs cool, with a typical high of 54° and a low dipping to 37° overnight. There's nearly a coin-flip chance of rain (43%), though snow is essentially off the table at this point in spring. The date has swung wildly in the past — from a bitter 27° low in 2018 to a shirt-sleeve 76° high just three years ago in 2021.
South Shore's weather has real teeth on both ends of the thermometer — the mercury has soared to 104° in July 1999 and cratered to -22° in the brutal January of 2019, a swing of 126 degrees. The area can dish out serious precipitation too, from 5.2 inches of rain in a single October day in 2017 to a 14.3-inch snowfall in December 2000.
Summer is the sweet spot here, with mid-July highs averaging 86° and the warmest stretch running July 16–22. If you're cold-averse, avoid mid-January, when average highs barely crack 30°. Pack an umbrella for early May — the week of May 7–13 is the wettest of the year, averaging over an inch of rainfall.