Historical weather data, all-time temperature records, and monthly climate averages for East Saint Louis, IL. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 4th in East Saint Louis runs mild but unpredictable — the average high of 62° sounds pleasant, but this date has swung from a bitter 28° in 2002 all the way to 84° just last year in 2023. There's about a 1-in-3 chance of rain today, so keep an umbrella handy.
East Saint Louis doesn't mess around at the extremes — summers can scorch to 107° (June 2012) and winters can plunge to -14° (January 2014), a brutal 121-degree swing between all-time records. A single July day in 2022 dropped 7.23 inches of rain, and New Year's Day 2015 buried the city under 9 inches of snow.
Summers here are genuinely hot, with late July averaging a high of 91° and the whole stretch from June through August pushing into the upper 80s. If you're avoiding the heat, aim for spring or fall — April through May and September through October offer highs in the 60s to 70s. Late June into early July is the wettest window, averaging over an inch and a half of rain in a single week.