Today's forecast calls for mostly sunny skies across southwestern Connecticut, with a high temperature in the upper-80s.

Because of the heat and high humidity, however, the state has issued an air-quality alert from 11 a.m. to 11 p.m. today since ozone levels are expected to reach unhealthy levels.

The National Weather Service says that, in addition to uncomfortable temperature and humidity levels, there will be a light and variable wind, becoming south around 6 mph in the afternoon.

Tonight should be mostly clear, with the temperature dipping to the upper-60s and a south wind 5 to 8 mph.

Tomorrow brings a slight chance of showers and thunderstorms after noon. Otherwise, skies will be mostly sunny, with a high temperature in the upper-80s. There remains an overnight chance of precipitation as clouds move in and the temperature registers a low about 70 degrees.

Saturday should be mostly sunny, but there is a slight chance of showers and thunderstorms, the NWS says. The daytime high temperature will be in the mid-80s. Saturday night will be mostly cloudy, with a low temperature in the low-70s.

On Sunday, there is a greater chance of showers and thunderstorms although skies will be partly sunny and the high temperature will be in the mid-80s. A chance of showers and thunderstorms remains Sunday night, and the low temperature will be about 70 degrees.

The outlook for Monday, according to the weather service, is for possible showers and thunderstorms, mostly cloudy skies and a high temperature in the low-80s.