Tonight — Partly cloudy in the evening then becoming mostly cloudy. A chance of showers and thunderstorms. Lows around 70. West winds 10 to 15 mph becoming northwest around 5 mph. Chance of rain 50 percent.

Wednesday — Mostly cloudy in the morning then becoming partly sunny. A chance of showers and thunderstorms. Highs in the mid 80s. West winds 5 to 10 mph. Chance of rain 50 percent. Wednesday night — Partly cloudy. Lows in the upper 50s. North winds around 5 mph.

Thursday — Mostly sunny. Highs in the lower 80s. Northwest winds 10 to 15 mph. Thursday night — Mostly clear. Lows in the mid 50s.

Friday — Mostly sunny. Highs around 80. Friday night — Mostly clear. Lows in the mid 50s.

Saturday — Mostly sunny. Highs in the lower 80s. Saturday night — Mostly clear. Lows in the upper 50s.

Sunday — Partly sunny. Highs in the mid 80s. Sunday night — Partly cloudy. Lows in the lower 60s.

NATION: Temperatures in the Lower 48 states Monday have ranged from 35 degrees at Truckee, Calif., to 104 degrees at Chamberlain, S.D.