National Weather Service Forecast for: Somerville MA
Issued by: National Weather Service Norton, MA
Updated: 3:11 pm EDT Jul 5, 2025
 
Tonight

Tonight: Partly cloudy, with a low around 69. Southwest wind around 8 mph.
Partly Cloudy

Sunday

Sunday: Mostly sunny and hot, with a high near 95. Southwest wind 10 to 14 mph.
Hot

Sunday
Night
Sunday Night: Mostly clear, with a low around 73. Southwest wind 8 to 10 mph.
Mostly Clear

Monday

Monday: Mostly sunny and hot, with a high near 94. Heat index values as high as 97. Southwest wind 8 to 11 mph.
Hot

Monday
Night
Monday Night: A chance of showers and thunderstorms.  Mostly cloudy, with a low around 74. Southwest wind 6 to 9 mph.  Chance of precipitation is 40%.
Chance
Showers

Tuesday

Tuesday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 11am.  Mostly cloudy, with a high near 87. Southwest wind 6 to 8 mph.  Chance of precipitation is 70%.
Showers
Likely

Tuesday
Night
Tuesday Night: Showers likely and possibly a thunderstorm before 9pm, then a chance of showers and thunderstorms between 9pm and 2am, then a chance of showers after 2am.  Mostly cloudy, with a low around 70. Southwest wind around 5 mph becoming light and variable  in the evening.  Chance of precipitation is 60%.
Showers
Likely then
Chance
T-storms
Wednesday

Wednesday: A chance of showers before 10am, then a chance of showers after 3pm.  Partly sunny, with a high near 81. North wind 5 to 7 mph becoming east in the afternoon.  Chance of precipitation is 30%.
Chance
Showers

Wednesday
Night
Wednesday Night: A chance of showers before 7pm.  Mostly cloudy, with a low around 67. Light northeast wind.  Chance of precipitation is 30%.
Chance
Showers then
Mostly Cloudy
Lo 69 °F Hi 95 °F Lo 73 °F Hi 94 °F Lo 74 °F Hi 87 °F Lo 70 °F Hi 81 °F Lo 67 °F

Heat Advisory
 

Tonight
 
Partly cloudy, with a low around 69. Southwest wind around 8 mph.
Sunday
 
Mostly sunny and hot, with a high near 95. Southwest wind 10 to 14 mph.
Sunday Night
 
Mostly clear, with a low around 73. Southwest wind 8 to 10 mph.
Monday
 
Mostly sunny and hot, with a high near 94. Heat index values as high as 97. Southwest wind 8 to 11 mph.
Monday Night
 
A chance of showers and thunderstorms. Mostly cloudy, with a low around 74. Southwest wind 6 to 9 mph. Chance of precipitation is 40%.
Tuesday
 
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 11am. Mostly cloudy, with a high near 87. Southwest wind 6 to 8 mph. Chance of precipitation is 70%.
Tuesday Night
 
Showers likely and possibly a thunderstorm before 9pm, then a chance of showers and thunderstorms between 9pm and 2am, then a chance of showers after 2am. Mostly cloudy, with a low around 70. Southwest wind around 5 mph becoming light and variable in the evening. Chance of precipitation is 60%.
Wednesday
 
A chance of showers before 10am, then a chance of showers after 3pm. Partly sunny, with a high near 81. North wind 5 to 7 mph becoming east in the afternoon. Chance of precipitation is 30%.
Wednesday Night
 
A chance of showers before 7pm. Mostly cloudy, with a low around 67. Light northeast wind. Chance of precipitation is 30%.
Thursday
 
A chance of showers after 1pm. Mostly cloudy, with a high near 78. East wind 3 to 8 mph. Chance of precipitation is 30%.
Thursday Night
 
A chance of showers. Cloudy, with a low around 66. East wind around 5 mph becoming calm in the evening. Chance of precipitation is 40%.
Friday
 
A chance of showers. Mostly cloudy, with a high near 77. East wind 6 to 8 mph. Chance of precipitation is 30%.
Friday Night
 
Mostly cloudy, with a low around 65. East wind around 6 mph becoming calm in the evening.
Saturday
 
Mostly sunny, with a high near 78. East wind 5 to 8 mph.

 

Forecast from NOAA-NWS for Somerville MA.