Historical weather data, all-time temperature records, and monthly climate averages for Freeport, IL. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 5 in Freeport sits right on the edge of spring — average highs of 52° with lows still flirting with freezing at 32°. The date's range tells the full story: it's hit 77° (2005) and dropped to 16° (1975), so don't put the coat away just yet. There's a 32% chance of rain, though snow is nearly off the table at just 3%.
Freeport plays for keeps on both ends of the thermometer — 103° in July 2012 and a brutal -31° in January 2019 give it a 134-degree spread across its recorded history. A single August day in 2002 dumped 9.12 inches of rain, and a February 2011 snowstorm dropped 11 inches in 24 hours.
Summer is the sweet spot, with highs peaking around 83-84° in mid-July and staying comfortable through August. Winters are legitimately cold — January highs average just 27-28°, so plan accordingly. June is the wettest month, averaging over an inch of rain in its middle weeks, while spring and fall offer mild but variable shoulder seasons.