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.

Heavy Rain

77°F

25°C

Humidity 77%
Wind Speed S 10 G 21 mph
Barometer 29.99 in (1015.5 mb)
Dewpoint 69°F (21°C)
Visibility 3.00 mi
Heat Index79°F (26°C)
Last update 30 Jun 5:54 pm EDT
Extended Forecast for

Charlestown MA

Extreme Heat Warning July 1, 10:00am until July 4, 08:00pm
Click here for hazard details and duration
Extreme Heat Warning

  • Tonight

    Tonight: A chance of showers and thunderstorms. Mostly cloudy, with a low around 71. Southwest wind 7 to 9 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 71 °F

    Chance
    Showers

  • Wednesday

    Wednesday: Mostly sunny and hot, with a high near 98. Heat index values as high as 104. Southwest wind 8 to 10 mph.

    High: 98 °F

    Hot

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 76. Southwest wind 7 to 10 mph.

    Low: 76 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny and hot, with a high near 101. Heat index values as high as 110. West wind 7 to 10 mph.

    High: 101 °F

    Hot

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 81. West wind 5 to 8 mph.

    Low: 81 °F

    Mostly Clear

  • Friday

    Friday: Sunny and hot, with a high near 102. West wind 6 to 10 mph.

    High: 102 °F

    Hot

  • Friday Night

    Friday Night: Mostly clear, with a low around 77. West wind 5 to 7 mph.

    Low: 77 °F

    Mostly Clear

  • Independence Day

    Independence Day: A chance of showers and thunderstorms after 3pm. Mostly sunny and hot, with a high near 95. West wind 5 to 9 mph. Chance of precipitation is 30%.

    High: 95 °F

    Sunny then
    Chance
    T-storms

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms before 8pm, then a chance of showers between 8pm and 10pm. Partly cloudy, with a low around 72. West wind 3 to 5 mph. Chance of precipitation is 30%.

    Low: 72 °F

    Chance
    T-storms then
    Partly Cloudy

Detailed Forecast

Tonight
A chance of showers and thunderstorms. Mostly cloudy, with a low around 71. Southwest wind 7 to 9 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday
Mostly sunny and hot, with a high near 98. Heat index values as high as 104. Southwest wind 8 to 10 mph.
Wednesday Night
Mostly clear, with a low around 76. Southwest wind 7 to 10 mph.
Thursday
Sunny and hot, with a high near 101. Heat index values as high as 110. West wind 7 to 10 mph.
Thursday Night
Mostly clear, with a low around 81. West wind 5 to 8 mph.
Friday
Sunny and hot, with a high near 102. West wind 6 to 10 mph.
Friday Night
Mostly clear, with a low around 77. West wind 5 to 7 mph.
Independence Day
A chance of showers and thunderstorms after 3pm. Mostly sunny and hot, with a high near 95. West wind 5 to 9 mph. Chance of precipitation is 30%.
Saturday Night
A chance of showers and thunderstorms before 8pm, then a chance of showers between 8pm and 10pm. Partly cloudy, with a low around 72. West wind 3 to 5 mph. Chance of precipitation is 30%.
Sunday
Mostly sunny, with a high near 86. Light and variable wind becoming east 5 to 9 mph in the morning.
Sunday Night
A chance of showers. Mostly cloudy, with a low around 69. East wind around 5 mph becoming calm in the evening. Chance of precipitation is 30%.
Monday
A chance of showers. Partly sunny, with a high near 81. Calm wind becoming east 5 to 8 mph in the afternoon. Chance of precipitation is 30%.
Monday Night
Partly cloudy, with a low around 67. Southeast wind around 5 mph becoming light and variable in the evening.
Tuesday
Mostly sunny, with a high near 81. Light and variable wind becoming east 5 to 9 mph in the morning.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Charlestown MA
 42.38°N 71.07°W (Elev. 3 ft)
Last Update:
3:34 pm EDT Jun 30, 2026
Forecast Valid:
6pm EDT Jun 30, 2026-6pm EDT Jul 7, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation