Weather forecast for: Arlington Heights IL
Last Update: 4:55 am CDT Sep 3, 2026
Today: A 40 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 94. Heat index values as high as 105. Southwest wind 5 to 10 mph becoming northwest in the afternoon. Winds could gust as high as 15 mph.
Tonight: A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 71. East southeast wind 5 to 10 mph becoming south after midnight.
Friday: A 50 percent chance of showers and thunderstorms, mainly before 10am. Mostly cloudy, then gradually becoming sunny, with a high near 88. Heat index values as high as 97. East wind 5 to 10 mph becoming west southwest in the afternoon.
Friday Night: A 50 percent chance of showers and thunderstorms. Partly cloudy, with a low around 73. East wind around 5 mph.
Saturday: A 20 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 80. Northeast wind 5 to 10 mph.
Saturday Night: Partly cloudy, with a low around 68.
Sunday: Mostly sunny, with a high near 77.
Sunday Night: Partly cloudy, with a low around 65.
Labor Day: Mostly sunny, with a high near 82.
Monday Night: Partly cloudy, with a low around 66.
Tuesday: Mostly sunny, with a high near 85.
Tuesday Night: A chance of showers. Partly cloudy, with a low around 71.
Wednesday: A chance of showers. Partly sunny, with a high near 85.
WeatherWorld.com
