Historical weather data, all-time temperature records, and monthly climate averages for Palatine, IL. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 5 in Palatine tends to feel more late-winter than spring, with an average high of just 54° and a low near 35°. That said, the date has a wide range — it hit 76° back in 2005, and dropped to 21° in 2002. Rain is a coin-flip at 38%, but snow is off the table.
Palatine plays the full extremes of the Midwest — a scorching 104° in July 2012 and a brutal -21° in January 2019 represent a 125-degree spread over 30 years. A single day in June 2013 dropped 4.53 inches of rain, a reminder that summer storms here mean business.
Summer is the sweet spot, with highs peaking around 84–85° in mid-July and comfortable warmth running from May through September. If you're trying to avoid the cold, steer clear of January, when average highs barely crack 30°. Late June into early July is the wettest stretch of the year, averaging over an inch of precipitation per week.