Historical weather data, all-time temperature records, and monthly climate averages for Machesney Park, IL. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 5th in Machesney Park sits right in that unsettled shoulder season — expect a high near 53° and a low around 33°, with about a 1-in-3 chance of rain and a slim 4% shot at snow. The date has seen wild swings over 133 years of records, from a balmy 80° in 1929 to a brutal 16° low back in 1926.
Machesney Park plays in the extremes — 133 years of data stretches from a scorching 110° in July 1936 all the way down to a bone-crushing -29° in January 2019, a swing of 139 degrees. Single-day rainfall hit 6.55 inches back in June 1898, and a February 2011 snowstorm dropped a full 15 inches in one shot.
Summers here are warm and humid, peaking in the July 16–22 window when highs average 85°, while late January is the depths of winter with average highs barely reaching 28°. If you're trying to avoid rain, steer clear of mid-June — that's the wettest stretch of the year, averaging over an inch of precipitation in a single week.