National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Laurence G Hanscom Field Airport (KBED)

Lat: 42.47°NLon: 71.29°WElev: 132ft.

Mostly Cloudy

76°F

24°C

Humidity 85%
Wind Speed SW 7 mph
Barometer 30.04 in (1018.3 mb)
Dewpoint 71°F (22°C)
Visibility 10.00 mi
Heat Index77°F (25°C)
Last update 14 Jul 9:51 pm EDT
Extended Forecast for

Waltham MA

Heat Advisory July 15, 11:00am until July 17, 07:00pm
Click here for hazard details and duration
Heat Advisory

  • Tonight

    Tonight: A slight chance of showers and thunderstorms, then a chance of showers after 11pm. Patchy fog after 3am. Otherwise, cloudy, with a low around 72. Southwest wind 3 to 5 mph. Chance of precipitation is 30%.

    Low: 72 °F

    Slight Chance
    T-storms then
    Chance
    Showers and
    Patchy Fog

  • Tuesday

    Tuesday: A slight chance of showers before 2pm, then a slight chance of showers and thunderstorms between 2pm and 3pm. Patchy fog before 8am. Otherwise, cloudy through mid morning, then gradual clearing, with a high near 89. Heat index values as high as 95. Southwest wind 3 to 6 mph. Chance of precipitation is 20%.

    High: 89 °F

    Slight Chance
    T-storms and
    Patchy Fog

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 71. Southwest wind 3 to 5 mph.

    Low: 71 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny and hot, with a high near 92. Heat index values as high as 99. Calm wind becoming southwest around 6 mph in the afternoon.

    High: 92 °F

    Hot

  • Wednesday Night

    Wednesday Night: A slight chance of showers between 11pm and 2am, then a slight chance of showers and thunderstorms after 2am. Mostly cloudy, with a low around 74. Southwest wind around 6 mph. Chance of precipitation is 20%.

    Low: 74 °F

    Slight Chance
    Showers then
    Slight Chance
    T-storms

  • Thursday

    Thursday: A chance of showers and thunderstorms, mainly after 9am. Partly sunny and hot, with a high near 90. Southwest wind 6 to 9 mph. Chance of precipitation is 40%.

    High: 90 °F

    Chance
    Showers then
    Chance
    T-storms

  • Thursday Night

    Thursday Night: A chance of thunderstorms before 8pm. Partly cloudy, with a low around 75. West wind 5 to 7 mph. Chance of precipitation is 30%.

    Low: 75 °F

    Chance
    T-storms then
    Partly Cloudy

  • Friday

    Friday: A chance of showers and thunderstorms after 3pm. Mostly sunny and hot, with a high near 90. West wind around 7 mph. Chance of precipitation is 30%.

    High: 90 °F

    Mostly Sunny
    then Chance
    T-storms

  • Friday Night

    Friday Night: A chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 67. North wind 3 to 5 mph. Chance of precipitation is 30%.

    Low: 67 °F

    Chance
    T-storms then
    Partly Cloudy

Detailed Forecast

Tonight
A slight chance of showers and thunderstorms, then a chance of showers after 11pm. Patchy fog after 3am. Otherwise, cloudy, with a low around 72. Southwest wind 3 to 5 mph. Chance of precipitation is 30%.
Tuesday
A slight chance of showers before 2pm, then a slight chance of showers and thunderstorms between 2pm and 3pm. Patchy fog before 8am. Otherwise, cloudy through mid morning, then gradual clearing, with a high near 89. Heat index values as high as 95. Southwest wind 3 to 6 mph. Chance of precipitation is 20%.
Tuesday Night
Mostly clear, with a low around 71. Southwest wind 3 to 5 mph.
Wednesday
Mostly sunny and hot, with a high near 92. Heat index values as high as 99. Calm wind becoming southwest around 6 mph in the afternoon.
Wednesday Night
A slight chance of showers between 11pm and 2am, then a slight chance of showers and thunderstorms after 2am. Mostly cloudy, with a low around 74. Southwest wind around 6 mph. Chance of precipitation is 20%.
Thursday
A chance of showers and thunderstorms, mainly after 9am. Partly sunny and hot, with a high near 90. Southwest wind 6 to 9 mph. Chance of precipitation is 40%.
Thursday Night
A chance of thunderstorms before 8pm. Partly cloudy, with a low around 75. West wind 5 to 7 mph. Chance of precipitation is 30%.
Friday
A chance of showers and thunderstorms after 3pm. Mostly sunny and hot, with a high near 90. West wind around 7 mph. Chance of precipitation is 30%.
Friday Night
A chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 67. North wind 3 to 5 mph. Chance of precipitation is 30%.
Saturday
Mostly sunny, with a high near 82. Light and variable wind becoming northeast around 6 mph in the morning.
Saturday Night
Partly cloudy, with a low around 66. Southeast wind around 5 mph becoming calm in the evening.
Sunday
A chance of showers and thunderstorms. Partly sunny, with a high near 82. South wind 3 to 7 mph. Chance of precipitation is 30%.
Sunday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 66. South wind 3 to 6 mph. Chance of precipitation is 30%.
Monday
Mostly sunny, with a high near 82. North wind 5 to 7 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Waltham MA
 42.38°N 71.24°W (Elev. 98 ft)
Last Update:
2:03 pm EDT Jul 14, 2025
Forecast Valid:
10pm EDT Jul 14, 2025-6pm EDT Jul 21, 2025
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation