Historical weather data, all-time temperature records, and monthly climate averages for Morris, IL. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 5th in Morris lands right in that classic Midwest in-between zone — expect a high near 56° and a low around 36°, with roughly a 1-in-3 chance of rain. The date has a wide range in the history books, from a bitter 15° back in 1920 to a shirt-sleeve 83° in 1929.
Morris has seen the full fury of the Illinois climate over its 115 years of records — from a scorching 109° in July 1936 to a brutal -26° in December 1924, a swing of 135 degrees. A single September day in 2019 dropped 6.51 inches of rain, and a January 1930 storm buried the area under a foot of snow.
Summer is the sweet spot for visitors, with highs peaking around 86-87° in mid-July, while mid-January is the one to avoid at a frigid average high of just 31°. If you're watching for rain, late spring is the wet season — the week of May 7-13 averages over an inch of precipitation, the highest of the year.