Today promises to be mostly sunny in southwestern Connecticut, with the high temperature rising above the freezing level for the first time in several days.

The National Weather Service says the daytime high should be in the mid-30s, with a west wind between 9 and 15 mph. Tonight will be mostly clear, with the low temperature plunging to about 8 degrees.

The observance of the Martin Luther King Jr. holiday tomorrow will take place under sunny skies, with a high near 21 degrees.

Tomorrow night, however, there likely will be light snowfall, with accumulation of less than an inch. The low temperature is expected to be about 19 degrees with a calm wind of only 4 to 7 mph.

On Tuesday, there is a chance of more snow before 9 a.m., the NWS predicts, the changing to a mix of snow, freezing rain and sleet until midday. Then precipitation will become primarily rain as the temperature rises to nearly 40 degrees.

Rain is expected to continue Tuesday night, mainly before midnight.

Rain should continue Wednesday morning, primarily before 10 a.m. The day then remains cloudy as the temperature rises into the low-40s.