Historical weather data, all-time temperature records, and monthly climate averages for Pekin, IL. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 5 in Pekin lands right in the heart of unpredictable spring—across 82 years of data, temperatures on this date have swung from a bone-cold 20° in 1982 to a shirt-sleeve 83° in 1988. Expect something closer to 57° for a high and 35° overnight, with a 38% shot at rain and a lingering 7% chance of snow.
Pekin's weather has serious range: the thermometer has reached a sweltering 105° in June 1988 and plunged to a brutal -25° in January 1977—a 130-degree spread between its extremes. On the wet side, a single July day in 2020 dumped 5.19 inches of rain, and a January 1979 snowstorm buried the city under 12.2 inches in one shot.
Summers here are genuinely hot, with mid-July averaging highs of 86°, while mid-January bottoms out around 31°—a classic continental Midwest rhythm. Late April is the wettest stretch of the year, averaging over an inch of precipitation in a single week, so pack accordingly if you're visiting in spring.