Historical weather data, all-time temperature records, and monthly climate averages for Centralia, IL. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 4th in Centralia typically lands in that sweet spot of early spring, with average highs of 62° and lows of 40°. The date has swung wildly over the years — from a shirt-sleeve 80° in 2011 to a bitter 25° back in 1975. There's about a 1-in-3 chance of rain today, but you can put the snow shovel away.
Centralia has seen some serious weather extremes over its 111 years of records — from a scorching 105° on July 8, 2012 to a bone-cracking -23° on January 19, 1994, a swing of 128 degrees. A single day in September 2018 dropped 6.36 inches of rain, and a January 1982 storm buried the town under 13.5 inches of snow.
Centralia runs hot in summer, with highs averaging 88-89° in July and peaking around July 9-15. Winter is cold but not brutal, with average highs hovering near 36-38° in January. If you're dodging rain, avoid mid-May — that's the wettest stretch of the year, averaging over an inch of precipitation in a single week.