Historical weather data, all-time temperature records, and monthly climate averages for Montgomery, IL. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 5 in Montgomery sits squarely in spring's uncertain middle ground — average highs of 55° with lows still dipping to 34°. The date has seen everything from a balmy 83° in 1988 to a brutal 14° low back in 1975. There's about a 1-in-3 chance of rain today, though snow is nearly off the table at just 2%.
Montgomery's weather history is not for the faint of heart — the town has swung from a scorching 111° in July 1936 to a bone-chilling -26° in January 1985, a range of 137 degrees. The wettest single day on record dropped a staggering 16.91 inches on July 18, 1996, and a February 2011 snowstorm buried the area under 17 inches in one shot.
Montgomery's warmest stretch runs late July, when highs average 86°, while early January is the coldest with highs that barely crack 31°. If you're trying to dodge rain, avoid mid-June — that's the wettest week of the year, averaging over an inch of precipitation. Spring and fall offer the most comfortable temperatures, though both come with unpredictable swings.