 The overnight forecast from news radio WJPF calls for clear skies, a low of 65. The forecast is brought to you by AES Solar on Route 13 in Carterville. Southern Illinois' solar expert since 1999. Lower your electric bills, visit aessolar.com. For the new day, sunny skies, not as humid, with a high of 87. Partly cloudy Thursday night, a low of 66. Sunny, hot, and humid on Friday, with a high of 90.