Heat Index Over 100 Degrees, Hot And Humid Weather For IL

ILLINOIS — A hot week is ahead for Illinois as heat index values rise over 100 degrees. According to the National Weather Service, temperatures will be in the 90s all week, with heat index values between 100 and 105 on Thursday and Friday.

The weather service said there also could be widely scattered thunderstorms possible. There is a chance of thunderstorms starting Tuesday until the end of the week.

Here is a more detailed look at the weather for this week:

MONDAY: Sunny, with a high near 93. Calm wind becoming east southeast around 5 mph in the afternoon.

MONDAY NIGHT: Mostly clear, with a low around 71. East southeast wind around 5 mph becoming calm in the evening.

TUESDAY: A 40 percent chance of showers and thunderstorms after 1 p.m. Mostly sunny, with a high near 93. Heat index values as high as 98. Calm wind becoming southwest around 5 mph in the afternoon.

TUESDAY NIGHT: Partly cloudy, with a low around 73. Southwest wind around 5 mph becoming calm in the evening.

WEDNESDAY: A 20 percent chance of showers and thunderstorms after 1 p.m. Mostly sunny, with a high near 94.

WEDNESDAY NIGHT: Partly cloudy, with a low around 74.

THURSDAY: A chance of showers and thunderstorms, mainly after 1 p.m. Mostly sunny, with a high near 94.

THURSDAY NIGHT: A chance of showers and thunderstorms. Mostly cloudy, with a low around 73.

FRIDAY: A chance of showers and thunderstorms. Mostly sunny, with a high near 91.

FRIDAY NIGHT: A slight chance of showers and thunderstorms. Mostly clear, with a low around 70.