Rain is expected to fall across southwestern Connecticut later this afternoon and tonight, but the National Weather Service warns that precipitation this weekend could take a wintry turn.

Today's rain is likely to start falling after 4 p.m., the NWS says, as the daytime high temperature rises to about 45 degrees. The south wind will be only about 6 mph.

Rain is likely overnight into early tomorrow as the temperature falls to a low in the mid-30s.

Tomorrow begins with a chance of showers in the morning before 7 a.m., then cloudy skies will gradually clear as the temperature warms to a high in the low-50s. There will be a northwest wind between 7 and 11 mph. Tomorrow night will be mostly clear, with a low around 30 degrees.

Saturday, the NWS predicts, will be mostly sunny, with a high near 48 degrees.

Overnight, however, there is a chance of snow as the low temperature registers about 30 degrees.

On Sunday, there remains a chance of snow before 8 a.m., followed by a mix of rain and snow, and then changing to all rain after 9 a.m. The high temperature is expected to reach the upper-30s, the weather service predicts.