Historical weather data, all-time temperature records, and monthly climate averages for Downers Grove, IL. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 4th in Downers Grove is a coin-flip day in every sense — there's a 49% chance of rain and temperatures that can swing wildly, from a brutal 13° in 1975 to a gorgeous 76° in 2010. The average lands around 52° for a high and 33° for a low, so expect cool and unsettled, but know that spring can occasionally show up early.
Downers Grove earns its Midwest stripes with some serious extremes: a scorching 104° in June 1988 and a bone-crushing -27° in January 1985 — a range of 131 degrees between the worst of summer and winter. The wettest single day on record dumped 6.86 inches in July 2011, and a January 1999 storm buried the town under 18.6 inches of snow.
Summers here peak in mid-July with average highs of 85°, while January is the depth of winter at just 29°. July is also the wettest stretch of the year, averaging over an inch of rain per week, so pack accordingly. If you want the most comfortable weather, aim for September when highs ease back to a pleasant 75°.