The big chill continues today in southwestern Connecticut, with temperature readings below the freezing threshold all day -- and wind-chill values that make the frigid air feel below zero -- and possible snow tonight.

The skies are expected to cloud over by afternoon, as the daytime high temperature reaches only the mid-20s. Wind-chill readings could range from minus-3 to minus-5 degrees with a west wind around 7 mph, according to the National Weather Service.

Tonight, light snow is likely, mainly between 7 p.m. and 1 a.m., the NWS says. Skies will be cloudy, and the temperature is expected to drop to the mid-teens. Chance of precipitation is 60 percent -- new snow accumulation of less than one-half inch possible.

Tomorrow should be partly sunny, with a high temperature in the upper-20s. Nighttime will be mostly clear, with a low temperature in the mid-teens.

Sunday is expected to be sunny and warmer, with temperatures rising to the low-30s. Sunday Night Partly cloudy, with a low around 19.

Monday will likely be mostly cloudy, with high temperatures in the upper-30s. Monday night there is a chance of rain and snow, the NWS says, will the low temperature about 30 degrees.

The outlook for Tuesday, according to the weather service, is cloudy and temperatures in the 40s.