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National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
7-Day Forecast 42.38°N 71.24°W (Text-Only)
NWS Forecast for: Waltham MA
Issued by: National Weather Service Norton, MA
Last Update: 12:46 am EDT Jun 30, 2026		Print

  • Overnight

    Overnight: Mostly clear, with a low around 62. Light southwest wind.

    Low: 62 °F

    Mostly Clear



  • Tuesday

    Tuesday: Mostly sunny and hot, with a high near 90. Light southwest wind increasing to 5 to 10 mph in the morning.

    High: 90 °F

    Hot



  • Tuesday
    Night

    Tuesday Night: A chance of showers and thunderstorms after 9pm. Mostly cloudy, with a low around 70. Southwest wind 11 to 13 mph. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 70 °F

    Chance
    Showers


  • Wednesday

    Wednesday: A slight chance of showers and thunderstorms before 8am, then a slight chance of showers and thunderstorms after 3pm. Mostly sunny and hot, with a high near 98. Heat index values as high as 107. West wind around 14 mph. Chance of precipitation is 20%.

    High: 98 °F

    Partly Sunny
    then Slight
    Chance
    T-storms

  • Wednesday
    Night

    Wednesday Night: A chance of showers and thunderstorms, mainly before 1am. Partly cloudy, with a low around 76. Southwest wind 5 to 8 mph. Chance of precipitation is 30%.

    Low: 76 °F

    Chance
    Showers


  • Thursday

    Thursday: Sunny and hot, with a high near 101. West wind 7 to 9 mph.

    High: 101 °F

    Hot



  • Thursday
    Night

    Thursday Night: Clear, with a low around 76. West wind 5 to 9 mph.

    Low: 76 °F

    Clear



  • Friday

    Friday: Sunny and hot, with a high near 100. West wind 6 to 11 mph, with gusts as high as 21 mph.

    High: 100 °F

    Hot



  • Friday
    Night

    Friday Night: Mostly clear, with a low around 73. West wind 5 to 7 mph.

    Low: 73 °F

    Mostly Clear





    • Overnight: Mostly clear, with a low around 62. Light southwest wind.

    Tuesday: Mostly sunny and hot, with a high near 90. Light southwest wind increasing to 5 to 10 mph in the morning.

    Tuesday Night: A chance of showers and thunderstorms after 9pm. Mostly cloudy, with a low around 70. Southwest wind 11 to 13 mph. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Wednesday: A slight chance of showers and thunderstorms before 8am, then a slight chance of showers and thunderstorms after 3pm. Mostly sunny and hot, with a high near 98. Heat index values as high as 107. West wind around 14 mph. Chance of precipitation is 20%.

    Wednesday Night: A chance of showers and thunderstorms, mainly before 1am. Partly cloudy, with a low around 76. Southwest wind 5 to 8 mph. Chance of precipitation is 30%.

    Thursday: Sunny and hot, with a high near 101. West wind 7 to 9 mph.

    Thursday Night: Clear, with a low around 76. West wind 5 to 9 mph.

    Friday: Sunny and hot, with a high near 100. West wind 6 to 11 mph, with gusts as high as 21 mph.

    Friday Night: Mostly clear, with a low around 73. West wind 5 to 7 mph.

    Independence Day: A chance of showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 96. West wind 5 to 9 mph. Chance of precipitation is 40%.

    Saturday Night: A chance of showers and thunderstorms. Partly cloudy, with a low around 71. West wind 3 to 5 mph. Chance of precipitation is 30%.

    Sunday: Mostly sunny, with a high near 88. North wind 3 to 8 mph.

    Sunday Night: Partly cloudy, with a low around 66. Southeast wind around 5 mph becoming calm in the evening.

    Monday: Partly sunny, with a high near 87. East wind 3 to 8 mph.


    Waltham MA
     42.38°N 71.24°W (Elev. 98 ft)

    Visit your local NWS office at: https://www.weather.gov/boston