Historical weather data, all-time temperature records, and monthly climate averages for Alsip, IL. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 5th in Alsip runs the full gamut — 97 years of data show highs anywhere from 18° to 85°, a 67-degree spread that captures the chaos of Midwest spring. Today's average calls for a 54° high and 37° low, with a 43% chance of rain and a lingering 7% shot at snow. That warmest reading of 85° back in 1988 feels like a different season entirely.
Alsip has seen genuine extremes over its nearly century-long record — from a scorching 107° on June 1, 1934, to a brutal -25° on January 20, 1985, a swing of 132 degrees. A single day in July 1957 dumped 6.16 inches of rain, and a January 1999 storm buried the area under 17.6 inches of snow.
Summer is the sweet spot here, with highs peaking around 85° the week of July 9–15 and staying warm through August. Winter bites hard — January highs average just 31° to 32°, making late November through February the stretch to plan around. July is also the wettest stretch of the year, averaging over an inch of precipitation in a single week, so pack accordingly.