Weather forecast for: Grant Park IL
Last Update: 2:41 am CDT Oct 17, 2026
Overnight: A 20 percent chance of showers before 4am. Partly cloudy, with a low around 39. North wind around 10 mph, with gusts as high as 15 mph.
Saturday: Partly sunny, then gradually becoming sunny, with a high near 57. Calm wind becoming west southwest around 5 mph.
Saturday Night: Patchy frost after 2am. Otherwise, clear, with a low around 33. Calm wind becoming south southwest around 5 mph after midnight.
Sunday: Areas of frost before 8am. Otherwise, sunny, with a high near 63. South southwest wind 5 to 10 mph, with gusts as high as 15 mph.
Sunday Night: Clear, with a low around 37. South wind around 5 mph becoming calm after midnight.
Monday: Sunny, with a high near 69.
Monday Night: Mostly clear, with a low around 40.
Tuesday: Sunny, with a high near 72.
Tuesday Night: Mostly clear, with a low around 43.
Wednesday: Sunny, with a high near 74.
Wednesday Night: Mostly clear, with a low around 46.
Thursday: Sunny, with a high near 77.
Thursday Night: Mostly clear, with a low around 48.
Friday: Sunny, with a high near 77.