Historical weather data, all-time temperature records, and monthly climate averages for Bloomington, IL. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 4th in Bloomington splits the difference between winter and spring — expect a high near 59° and a low around 35°, with better-than-even odds (53%) of some rain. The date has a dramatic range in the record books: a balmy 88° in 2012 versus a teeth-chattering 20° back in 1987.
Bloomington earns its Midwest stripes with a staggering 130-degree swing between its all-time extremes — 107° in July 2012 and -23° in January 1985. A single July day in 2003 dropped 5.63 inches of rain, and a January 1999 storm buried the city under a foot of snow.
Summer is the main event here, with highs peaking in the mid-to-upper 80s from late June through August and the warmest week of the year landing in mid-July. Winter runs cold and gray, with January highs barely cracking 31°. If you want to avoid both extremes, April and October offer mild temperatures in the 60s, though spring comes with a real chance of rain.