The first workday of the new year will be sunny in southwestern Connecticut, according to the National Weather Service, but warns that melting snow has frozen overnight, leaving patches of black ice that pose hazards to the morning commute.

The daytime high temperature will rise into the mid-30s, with a northwest wind between 10 and 13 mph. Tonight should be partly cloudy, with a low around 25 degrees.

Tomorrow is expected to be partly sunny, with a high near 39. There will be a wind between 10 and 13 mph. The nighttime low in the mid-20s.

On Wednesday, the NWS predicts, will be sunny, with a high near 39 degrees.

There is a chance of rain and snow showers after noon Thursday, with temperatures in the mid-30s.