Historical weather data, all-time temperature records, and monthly climate averages for New Lenox, IL. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 4th in New Lenox sits right in the thick of spring's uncertainty — expect a high around 53° and a low near 33°, with about a 1-in-3 chance of rain. The date has swung wildly over the decades, from a bitter 23° low in 1954 to a shirt-sleeve 72° high just two years later in 1956.
New Lenox has seen it all over its 133-year record, from a scorching 103° in July 1897 to a bone-cracking -20° that same January. A single June day in 1926 dropped 6.86 inches of rain, and November once buried the area under 10.5 inches of snow before winter had even officially arrived.
Summer is the sweet spot here — late June through early July peaks around 86-87°, while late January through early February bottoms out near 30°. If you're trying to avoid rain, steer clear of mid-June, which averages over an inch of precipitation in a single week. Spring and fall offer pleasant transitions, with April and October averaging highs in the 60s.