The Fourth of July weekend starts with a star-spangled forecast Saturday, according to the National Weather Service, but Sunday's outlook is not as bright.

Skies today will unfurl bright sunshine and a high temperature in the low-80s across southwestern Connecticut, with a north wind 5 to 8 mph becoming south.

Tonight will be partly cloudy, with a low around 67 degrees.

Tomorrow, however, brings what the NWS predicts is a 50 percent chance of showers and thunderstorms, mainly after 11 a.m. The day is expected to be mostly cloudy, with a high near 81 degrees and a southwest wind between 5 and 9 mph.

There remains a chance of showers and thunderstorms tomorrow night, mainly before midnight. The temperature will fall to a low of 67.

The forecast brightens for Monday, Independence Day, but there is a slight chance of showers and thunderstorms after noon, the NWS says. Otherwise, the day should be mostly sunny, with a high near 83 degrees and a west wind between 7 and 10 mph.

After the holiday, the weather service predicts Tuesday will have sunny skies with a high near 83 degrees.