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

Hazardous Weather Conditions

Current conditions at

Boston, Logan International Airport (KBOS)

Lat: 42.36°NLon: 71.01°WElev: 20ft.

Partly Cloudy

78°F

26°C

Humidity 60%
Wind Speed SW 10 mph
Barometer 30.10 in (1019.3 mb)
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Heat Index80°F (27°C)
Last update 5 Aug 8:54 pm EDT
Extended Forecast for

Charlestown MA

Heat Advisory August 6, 11:00am until August 7, 08:00pm
Click here for hazard details and duration
Heat Advisory

  • Tonight

    Tonight: Partly cloudy, with a low around 71. Southwest wind around 6 mph.

    Low: 71 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny and hot, with a high near 90. Heat index values as high as 97. Southwest wind 3 to 7 mph.

    High: 90 °F

    Hot

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 74. Southwest wind 3 to 5 mph.

    Low: 74 °F

    Mostly Clear

  • Friday

    Friday: Scattered showers and thunderstorms, mainly after 2pm. Mostly sunny and hot, with a high near 92. Heat index values as high as 96. West wind 3 to 6 mph. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 92 °F

    Sunny then
    Scattered
    T-storms

  • Friday Night

    Friday Night: Scattered showers and thunderstorms, mainly before 10pm. Mostly cloudy, with a low around 74. Southwest wind 3 to 5 mph. Chance of precipitation is 30%.

    Low: 74 °F

    Scattered
    T-storms

  • Saturday

    Saturday: A chance of showers and thunderstorms, mainly after 4pm. Mostly sunny and hot, with a high near 90. Southwest wind 6 to 10 mph. Chance of precipitation is 30%.

    High: 90 °F

    Mostly Sunny
    then Chance
    Showers

  • Saturday Night

    Saturday Night: A chance of showers before 9pm. Partly cloudy, with a low around 72. Southwest wind around 7 mph. Chance of precipitation is 30%.

    Low: 72 °F

    Chance
    Showers then
    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 89. West wind 7 to 11 mph.

    High: 89 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 69. West wind 5 to 7 mph.

    Low: 69 °F

    Mostly Clear

Detailed Forecast

Tonight
Partly cloudy, with a low around 71. Southwest wind around 6 mph.
Thursday
Mostly sunny and hot, with a high near 90. Heat index values as high as 97. Southwest wind 3 to 7 mph.
Thursday Night
Mostly clear, with a low around 74. Southwest wind 3 to 5 mph.
Friday
Scattered showers and thunderstorms, mainly after 2pm. Mostly sunny and hot, with a high near 92. Heat index values as high as 96. West wind 3 to 6 mph. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Friday Night
Scattered showers and thunderstorms, mainly before 10pm. Mostly cloudy, with a low around 74. Southwest wind 3 to 5 mph. Chance of precipitation is 30%.
Saturday
A chance of showers and thunderstorms, mainly after 4pm. Mostly sunny and hot, with a high near 90. Southwest wind 6 to 10 mph. Chance of precipitation is 30%.
Saturday Night
A chance of showers before 9pm. Partly cloudy, with a low around 72. Southwest wind around 7 mph. Chance of precipitation is 30%.
Sunday
Sunny, with a high near 89. West wind 7 to 11 mph.
Sunday Night
Mostly clear, with a low around 69. West wind 5 to 7 mph.
Monday
Sunny, with a high near 89. West wind 5 to 11 mph.
Monday Night
Partly cloudy, with a low around 71. West wind around 7 mph.
Tuesday
A chance of showers. Mostly sunny, with a high near 86. West wind 6 to 10 mph. Chance of precipitation is 40%.
Tuesday Night
A chance of showers. Mostly cloudy, with a low around 67. West wind 3 to 7 mph. Chance of precipitation is 30%.
Wednesday
Mostly sunny, with a high near 82. West wind 6 to 8 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Charlestown MA
 42.38°N 71.07°W (Elev. 3 ft)
Last Update:
6:25 pm EDT Aug 5, 2026
Forecast Valid:
9pm EDT Aug 5, 2026-6pm EDT Aug 12, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation