Weather forecast for: Algonquin IL
Last Update: 10:01 pm CDT Oct 1, 2026
Tonight: A 40 percent chance of showers, mainly before 1am. Mostly cloudy, with a low around 51. North wind 5 to 10 mph, with gusts as high as 15 mph.
Friday: Partly sunny, then gradually becoming sunny, with a high near 63. North wind around 10 mph, with gusts as high as 20 mph.
Friday Night: Mostly clear, with a low around 44. North northeast wind around 5 mph.
Saturday: Partly sunny, then gradually becoming sunny, with a high near 66. Calm wind becoming east southeast around 5 mph in the morning. Winds could gust as high as 10 mph.
Saturday Night: Mostly clear, with a low around 46. Southeast wind around 5 mph becoming calm.
Sunday: Sunny, with a high near 70.
Sunday Night: Mostly clear, with a low around 42.
Monday: Sunny, with a high near 64.
Monday Night: Clear, with a low around 40.
Tuesday: Sunny, with a high near 65.
Tuesday Night: Mostly clear, with a low around 47.
Wednesday: Mostly sunny, with a high near 71.
Wednesday Night: Partly cloudy, with a low around 48.
Thursday: Mostly sunny, with a high near 71.