Weekly weather forecast from Friday, May 23 to Friday, May 30

Waltham will experience a stretch of unusually chilly, gray, and windswept weather to close out May, as a late-season Nor’easter rolls through southern New England. While rain tapers by Friday morning, scattered showers linger through Saturday under a stubborn upper-level trough.

By Sunday, skies begin to brighten, temperatures slowly rebound, and a drier, more seasonable pattern takes hold just in time for Memorial Day.

Next week starts with sunshine, crisp mornings, and gradually warming afternoons, though a few damp periods from passing showers remain possible. A week that starts with coastal flooding ends with backyard barbecue potential, offering a little something for everyone this holiday weekend.