Cold overnight with lows in the 40s, except mid to upper 30s across portions of north Lake and northwest Volusia counties and a few other normally cooler rural locations across the interior. Immediate St. Lucie and Martin coasts may realize low 50s for mins. Patchy frost will be possible, too, across portions of north Lake and northwest Volusia counties, and perhaps any normally cooler locations across the interior. Skies will be mostly clear with northerly winds decreasing to light. Beach and boating conditions remain poor to hazardous.
A strong cold front arrives by Tuesday, bringing much colder air mid to late week. Temperatures are forecast to fall to 10 to 15 degrees below normal. The chance for widespread morning lows in the 30s is increasing for Wednesday and Thursday mornings. Patchy frost is also possible.