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.

A Few Clouds

80°F

27°C

Humidity 74%
Wind Speed S 13 mph
Barometer 30.03 in (1016.8 mb)
Dewpoint 71°F (22°C)
Visibility 10.00 mi
Heat Index83°F (28°C)
Last update 15 Jul 8:54 pm EDT
Extended Forecast for

Charlestown MA

Heat Advisory July 15, 09:23pm until July 17, 07:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory July 15, 09:23pm until July 17, 07:00pm

    NOW until 7:00pm Thu

    Heat Advisory

  • Tonight

    Low: 71 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny and hot, with a high near 92. Heat index values as high as 97. Calm wind becoming south around 6 mph in the afternoon.

    High: 92 °F

    Hot

  • Wednesday Night

    Wednesday Night: A slight chance of showers after 3am. Increasing clouds, with a low around 76. Southwest wind around 6 mph. Chance of precipitation is 20%.

    Low: 76 °F

    Partly Cloudy
    then Slight
    Chance
    Showers

  • Thursday

    Thursday: A chance of showers and thunderstorms, mainly after 7am. Mostly cloudy and hot, with a high near 91. Heat index values as high as 97. Southwest wind 6 to 10 mph. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 91 °F

    Chance
    Showers then
    Chance
    T-storms

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 11pm. Partly cloudy, with a low around 76. Southwest wind around 7 mph. Chance of precipitation is 30%.

    Low: 76 °F

    Chance
    T-storms then
    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 86. West wind 7 to 9 mph.

    High: 86 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 64. North wind 3 to 5 mph.

    Low: 64 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 82. Light and variable wind becoming east 5 to 7 mph in the morning.

    High: 82 °F

    Sunny

Detailed Forecast

Tonight
Mostly clear, with a low around 71. South wind around 5 mph becoming calm in the evening.
Wednesday
Sunny and hot, with a high near 92. Heat index values as high as 97. Calm wind becoming south around 6 mph in the afternoon.
Wednesday Night
A slight chance of showers after 3am. Increasing clouds, with a low around 76. Southwest wind around 6 mph. Chance of precipitation is 20%.
Thursday
A chance of showers and thunderstorms, mainly after 7am. Mostly cloudy and hot, with a high near 91. Heat index values as high as 97. Southwest wind 6 to 10 mph. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday Night
A chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 11pm. Partly cloudy, with a low around 76. Southwest wind around 7 mph. Chance of precipitation is 30%.
Friday
Mostly sunny, with a high near 86. West wind 7 to 9 mph.
Friday Night
Mostly clear, with a low around 64. North wind 3 to 5 mph.
Saturday
Sunny, with a high near 82. Light and variable wind becoming east 5 to 7 mph in the morning.
Saturday Night
Mostly cloudy, with a low around 67. Southwest wind around 6 mph.
Sunday
A chance of showers after 9am. Partly sunny, with a high near 83. South wind 5 to 9 mph. Chance of precipitation is 40%.
Sunday Night
A chance of showers. Mostly cloudy, with a low around 67. South wind around 6 mph becoming west after midnight. Chance of precipitation is 40%.
Monday
Mostly sunny, with a high near 81. Northwest wind 6 to 8 mph becoming northeast in the afternoon.
Monday Night
Partly cloudy, with a low around 64. East wind around 5 mph becoming light and variable in the evening.
Tuesday
Mostly sunny, with a high near 78. Light and variable wind becoming east 5 to 8 mph in the morning.
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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:
3:27 pm EDT Jul 15, 2025
Forecast Valid:
9pm EDT Jul 15, 2025-6pm EDT Jul 22, 2025
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation