Historical weather data, all-time temperature records, and monthly climate averages for Riverdale, IL. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 5 in Riverdale sits right in that classic spring transition zone — expect a high near 54° and a low around 34°, with about a 1-in-3 chance of rain. The date has swung wildly over 72 years of records, from a balmy 76° in 2005 down to a bitter 18° low in 1995. Snow? Not a concern today.
Riverdale has seen some serious weather extremes over the past 74 years. Summer 1988 brought a scorching 103° high, while January 1985 plunged to -27° — a 130-degree swing between the all-time records. A July 1996 storm dumped 6.55 inches of rain in a single day, and Groundhog Day 2011 buried the area under 19 inches of snow.
Riverdale's warmest stretch runs mid-July, when average highs peak at 85° — that's also when you'll face the most rain, averaging 1.29 inches in a single week. If you're cold-averse, avoid mid-January, where average highs barely clear 29°. Spring and fall offer the smoothest conditions, with April climbing from the 40s to near 60° and October holding steady in the mid-60s.