Historical weather data, all-time temperature records, and monthly climate averages for River Grove, IL. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 4th in River Grove sits right in the heart of spring's uncertainty — expect a high near 52° and a low around 33°, with nearly a coin-flip chance of rain. The date has swung wildly over the decades, from a brutal 13° in 1975 to a t-shirt-worthy 76° in 2010.
River Grove has seen some serious weather extremes over its 68-year record. The thermometer has climbed to a sweltering 104° in June 1988 and cratered to -27° in January 1985 — a swing of 131 degrees. A single July day in 2011 dumped 6.86 inches of rain, and a January storm in 1999 buried the area under 18.6 inches of snow.
Summer is peak season here — the third week of July averages a high of 85° and is also the wettest stretch of the year at over an inch of precip. If you want cool and dry, mid-January is the extreme opposite with average highs of just 29°. Spring and fall offer mild transitions, with April highs in the upper 50s and October in the low 60s.