Historical weather data, all-time temperature records, and monthly climate averages for Normal, IL. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 5 in Normal runs cool, with an average high of 57° and low of 34° across 47 years of records. The date has seen wild swings though — a balmy 83° back in 1988, and a teeth-chattering 21° low as recently as 2016. There's a 32% chance of rain today, but snow is nearly off the table at just 2%.
Normal lives up to its name for most of the year, but its extremes are anything but — the mercury has soared to 107° (July 2003) and crashed to -23° (January 1985), a jaw-dropping 130° range. A single summer storm dropped 5.63 inches of rain on July 10, 2003, and a January 1999 snowstorm buried the area under 12 inches in one day.
Normal's warmest stretch runs mid-July, when highs average 87°, while mid-January is the depths of winter at a frigid 31°. Summer is also the wettest season — the second week of July averages 1.19 inches of precipitation, so pack accordingly. If you want mild and dry, May (74°) and September (79°) are your sweet spots.