Historical weather data, all-time temperature records, and monthly climate averages for Lombard, IL. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 5th in Lombard sits right in that unpredictable shoulder season — average highs of 53° with lows still dipping to 34°. The date has seen everything from a balmy 85° back in 1988 to a bitter 18° in 1975, a 67-degree swing that tells you all you need to know about Illinois springs. There's a 37% chance of rain today, though snow is nearly off the table at just 3%.
Lombard's weather has real teeth on both ends — the mercury has hit 104° in June 1988 and cratered to -27° in January 1985, a staggering 131-degree range over the station's history. A single July day in 2011 dropped 6.86 inches of rain, and a January 1999 storm buried the area under 18.6 inches of snow.
Summer is the sweet spot, with mid-July highs averaging 85° — though that's also when the heaviest rain falls, averaging over an inch per week. Winter is genuinely cold, with mid-January highs barely cracking 29°. If you're planning a visit, May through September offers the most comfortable stretch before the cold sets in fast come November.