WDEF-TV News 12 Tennessee River Valley weather forecast Overnight / Christmas Night/ Hanukkah : Becoming mostly cloudy, chilly. Lows: low 40’s. Winds: L&V. Thursday / First Day of Kwanzaa: Mostly sunny early. Cloud/Sun Mix. Very mild. Highs: near 60. Winds: L&V then SE @ 5 MPH. Overnight: Mostly cloudy, chilly. L0ws: low/mid 40’s. Winds: SE…… MORE