Historical weather data, all-time temperature records, and monthly climate averages for Cicero, IL. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 5 in Cicero runs the gamut — lows have dipped to 24° (2018) and highs have reached 78° (2021), so don't put the layers away just yet. On average, expect a cool 55° high and a 37° low, with about a 1-in-3 chance of rain.
Cicero earns its Chicago-area stripes with some serious extremes: 104° in July 1999 and -22° in January 2019 — a 126-degree spread over 29 years of records. A single October day in 2017 dropped 5.2 inches of rain, and a December storm in 2000 buried the area under 14.3 inches of snow.
Summer is the sweet spot, with highs averaging 85-86° in mid-July, while mid-January bottoms out around 30°. Rain peaks in early-to-mid May, so spring travelers should pack accordingly. For the best weather, aim for late June through August.