Wednesday brings sunshine and clouds in the morning, forecasters say, with a 20 percent chance for showers in the afternoon, and an increasing risk of rain overnight.

Temperatures are expected to head up to around 78 degrees, with 75 the normal daily high for this time of year, said Jay Engle, National Weather Service meteorologist in Upton.

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But Thursday is the day that the remnants of Tropical Storm Irma may arrive, forecasters say. There will be a high of around 80 degrees, along with a 20 percent chance for showers and thunderstorms, the weather service said.

That’s as “a cold front along with tropical moisture” approaches, leading to “the ongoing chance of scattered showers and thunderstorms Thursday and Thursday night,” the weather service said.

Friday looks to be more of the same, with highs of around 77 degrees and the continuing chance for showers and thunderstorms.