Weekly weather forecast

For the week of Friday, May 2, to Friday, May 9.

Waltham kicks off May with a stretch of classic New England variability – sun, storms, fog, and a sharp cool-down. Friday brings lingering morning clouds and fog before a burst of warmth and humidity in the afternoon. The weekend features muggy air and scattered thunderstorms – especially Saturday evening – with some strong downpours possible. Sunday remains unsettled with showers and perhaps a rumble of thunder. A major pattern shift arrives early next week as cooler, marine-influenced air slides in, keeping highs in the 50s and low 60s with occasional showers. Gradual improvement looks possible by mid to late week, though exact timing of dry breaks remains uncertain. All in all, it’s a textbook spring week: layers, umbrellas, and patience required.