7-Day Forecast 42.39°N 71.27°W (Text-Only)
NWS Forecast for: Waltham MA
Issued by: National Weather Service Norton, MA
Last Update: 10:42 pm EDT Jul 16, 2025




Overnight: Mostly cloudy, with a low around 74. South wind around 6 mph.

Thursday: A chance of showers and thunderstorms, mainly before 3pm. Areas of fog before 7am. Otherwise, mostly cloudy and hot, with a high near 92. Heat index values as high as 99. Southwest wind 6 to 13 mph, with gusts as high as 23 mph. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Thursday Night: A slight chance of showers and thunderstorms between 8pm and 9pm. Partly cloudy, with a low around 72. West wind around 11 mph. Chance of precipitation is 20%.

Friday: Sunny, with a high near 82. Northwest wind 10 to 13 mph, with gusts as high as 24 mph.

Friday Night: Mostly clear, with a low around 62. Northwest wind around 6 mph becoming calm in the evening.

Saturday: Mostly sunny, with a high near 83. Calm wind becoming southwest around 6 mph in the afternoon.

Saturday Night: A chance of showers after midnight. Mostly cloudy, with a low around 67. Southwest wind around 6 mph. Chance of precipitation is 40%.

Sunday: A chance of showers, with thunderstorms also possible after 2pm. Mostly cloudy, with a high near 80. Southwest wind 6 to 8 mph becoming west in the afternoon. Chance of precipitation is 50%.

Sunday Night: A chance of showers and thunderstorms before 8pm, then a chance of showers between 8pm and 9pm. Partly cloudy, with a low around 63. West wind around 5 mph becoming northwest after midnight. Chance of precipitation is 30%.

Monday: Sunny, with a high near 81. North wind around 6 mph.

Monday Night: Mostly clear, with a low around 61. North wind around 5 mph becoming light and variable in the evening.

Tuesday: Mostly sunny, with a high near 82. Light and variable wind becoming southeast 5 to 7 mph in the morning.

Tuesday Night: Mostly clear, with a low around 64. Southwest wind around 6 mph.

Wednesday: Mostly sunny, with a high near 84. South wind 5 to 7 mph.



Waltham MA
 42.39°N 71.27°W (Elev. 197 ft)

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