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.

Overcast

75°F

24°C

Humidity 90%
Wind Speed SW 7 mph
Barometer 30.06 in (1017.8 mb)
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Last update 15 Jul 5:54 am EDT
Extended Forecast for

Somerville MA

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

  • Today

    Today: A slight chance of showers before 8am. Cloudy through mid morning, then gradual clearing and hot, with a high near 90. Heat index values as high as 96. Light and variable wind becoming south around 6 mph in the morning. Chance of precipitation is 20%.

    High: 90 °F

    Slight Chance
    Showers then
    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 72. Southwest wind 3 to 6 mph.

    Low: 72 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny and hot, with a high near 92. Heat index values as high as 98. South wind 3 to 7 mph.

    High: 92 °F

    Hot

  • Wednesday Night

    Wednesday Night: A slight chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 75. Southwest wind around 7 mph. Chance of precipitation is 20%.

    Low: 75 °F

    Mostly Cloudy
    then Slight
    Chance
    T-storms

  • Thursday

    Thursday: A chance of showers and thunderstorms. Partly sunny and hot, with a high near 91. Southwest wind 6 to 10 mph. Chance of precipitation is 50%.

    High: 91 °F

    Chance
    Showers then
    Chance
    T-storms

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms, mainly before 8pm. Partly cloudy, with a low around 77. Southwest wind around 7 mph. Chance of precipitation is 30%.

    Low: 77 °F

    Chance
    T-storms then
    Partly Cloudy

  • Friday

    Friday: A chance of showers and thunderstorms after 5pm. Mostly sunny, with a high near 88. West wind 6 to 8 mph. Chance of precipitation is 30%.

    High: 88 °F

    Mostly Sunny
    then Chance
    T-storms

  • Friday Night

    Friday Night: Partly cloudy, with a low around 66. North wind 3 to 5 mph.

    Low: 66 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 82. North wind 5 to 7 mph becoming east in the afternoon.

    High: 82 °F

    Sunny

Detailed Forecast

Today
A slight chance of showers before 8am. Cloudy through mid morning, then gradual clearing and hot, with a high near 90. Heat index values as high as 96. Light and variable wind becoming south around 6 mph in the morning. Chance of precipitation is 20%.
Tonight
Mostly clear, with a low around 72. Southwest wind 3 to 6 mph.
Wednesday
Sunny and hot, with a high near 92. Heat index values as high as 98. South wind 3 to 7 mph.
Wednesday Night
A slight chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 75. Southwest wind around 7 mph. Chance of precipitation is 20%.
Thursday
A chance of showers and thunderstorms. Partly sunny and hot, with a high near 91. Southwest wind 6 to 10 mph. Chance of precipitation is 50%.
Thursday Night
A chance of showers and thunderstorms, mainly before 8pm. Partly cloudy, with a low around 77. Southwest wind around 7 mph. Chance of precipitation is 30%.
Friday
A chance of showers and thunderstorms after 5pm. Mostly sunny, with a high near 88. West wind 6 to 8 mph. Chance of precipitation is 30%.
Friday Night
Partly cloudy, with a low around 66. North wind 3 to 5 mph.
Saturday
Sunny, with a high near 82. North wind 5 to 7 mph becoming east in the afternoon.
Saturday Night
Partly cloudy, with a low around 67. South wind around 6 mph becoming calm in the evening.
Sunday
A chance of showers. Partly sunny, with a high near 83. Light southwest wind becoming south 5 to 9 mph in the morning. Chance of precipitation is 30%.
Sunday Night
A chance of showers. Mostly cloudy, with a low around 68. West wind around 6 mph. Chance of precipitation is 40%.
Monday
Mostly sunny, with a high near 81. West wind 6 to 8 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Somerville MA
 42.39°N 71.09°W (Elev. 46 ft)
Last Update:
1:16 am EDT Jul 15, 2025
Forecast Valid:
6am EDT Jul 15, 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