Zone Forecast Product for Southern New England National Weather Service Boston/Norton MA 1004 PM EDT Fri Jul 17 2026 Southeast Middlesex MA- Including the city of Cambridge 1004 PM EDT Fri Jul 17 2026 .OVERNIGHT...Partly cloudy. Patchy smoke. Lows in the lower 60s. Southwest winds around 5 mph. .SATURDAY...Partly sunny. Patchy smoke. Showers likely with a slight chance of thunderstorms in the afternoon. Some thunderstorms may produce heavy rainfall in the afternoon. Highs in the upper 80s. Temperature falling into the upper 70s in the afternoon. Southwest winds 15 to 20 mph. Gusts up to 25 mph, increasing to 35 mph in the afternoon. Chance of rain 70 percent. .SATURDAY NIGHT...Showers with a chance of thunderstorms in the evening, then showers likely after midnight. Some thunderstorms may produce heavy rainfall in the evening. Locally heavy rainfall possible in the evening. Humid with lows in the upper 60s. Southwest winds 15 to 20 mph with gusts up to 30 mph. Chance of rain 90 percent. .SUNDAY...Sunny. Highs in the lower 80s. Northwest winds 10 to 15 mph. .SUNDAY NIGHT...Clear, cooler with lows in the upper 50s. Northwest winds 5 to 10 mph. .MONDAY...Sunny. Highs in the mid 80s. .MONDAY NIGHT...Partly cloudy. Lows in the mid 60s. .TUESDAY...Partly sunny with a chance of showers and thunderstorms. Highs in the mid 80s. Chance of rain 50 percent. .TUESDAY NIGHT AND WEDNESDAY...Showers with a chance of thunderstorms. Lows in the upper 60s. Highs in the upper 80s. Chance of rain 80 percent. .WEDNESDAY NIGHT...Mostly cloudy with a chance of showers and thunderstorms. Lows in the upper 60s. Chance of rain 50 percent. .THURSDAY THROUGH FRIDAY...Partly cloudy. Highs in the mid 80s. Lows in the mid 60s.