 WDEL News Time 809. Your WDEL Weather Center forecast. Slight chance of showers and thunderstorms today. Partly sunny, high near 91 degrees. Tonight, partly cloudy, low around 75. Tomorrow, mostly sunny, high near 94. Heat index is as high as 101. Tomorrow night, partly cloudy, low around 75. Tuesday, chance of showers and thunderstorms in the afternoon. Partly sunny, high near 93.