National Weather Service Forecast for: Waltham MA
Issued by: National Weather Service Norton, MA
Updated: 3:01 pm EDT Jul 16, 2026
 
This
Afternoon
This Afternoon: A slight chance of showers after 5pm. Widespread smoke, mainly after 5pm. Partly sunny, with a high near 89. West wind around 16 mph, with gusts as high as 29 mph. Chance of precipitation is 20%.
Slight Chance
Showers
 Tonight

Tonight: Widespread smoke, mainly before 8pm. Mostly cloudy, then gradually becoming clear, with a low around 57. Northwest wind 5 to 9 mph becoming light in the evening.
Smoke then
Mostly Clear
 Friday

Friday: Sunny, with a high near 85. Northwest wind 8 to 10 mph.
Sunny

 Friday
Night
Friday Night: Partly cloudy, with a low around 59. Southwest wind around 5 mph becoming calm in the evening.
Partly Cloudy

 Saturday

Saturday: A chance of showers and thunderstorms, mainly after 3pm. Partly sunny, with a high near 87. Southwest wind 5 to 14 mph, with gusts as high as 26 mph. Chance of precipitation is 30%.
Mostly Sunny
then Chance
Showers
 Saturday
Night
Saturday Night: Showers and thunderstorms likely before 9pm, then showers and possibly a thunderstorm between 9pm and 2am, then a chance of showers after 2am. Low around 68. South wind 9 to 11 mph, with gusts as high as 23 mph. Chance of precipitation is 90%.
Showers

 Sunday

Sunday: Sunny, with a high near 85. Northwest wind around 10 mph, with gusts as high as 20 mph.
Sunny

 Sunday
Night
Sunday Night: Clear, with a low around 62. Northwest wind 3 to 5 mph.
Clear

 Monday

Monday: Sunny, with a high near 84. Calm wind becoming west around 6 mph in the afternoon.
Sunny
Hi 89 °F Lo 57 °F Hi 85 °F Lo 59 °F Hi 87 °F Lo 68 °F Hi 85 °F Lo 62 °F Hi 84 °F

Air Quality Alert
 

This Afternoon
 
 A slight chance of showers after 5pm. Widespread smoke, mainly after 5pm. Partly sunny, with a high near 89. West wind around 16 mph, with gusts as high as 29 mph. Chance of precipitation is 20%.
Tonight
 
 Widespread smoke, mainly before 8pm. Mostly cloudy, then gradually becoming clear, with a low around 57. Northwest wind 5 to 9 mph becoming light in the evening.
Friday
 
 Sunny, with a high near 85. Northwest wind 8 to 10 mph.
Friday Night
 
 Partly cloudy, with a low around 59. Southwest wind around 5 mph becoming calm in the evening.
Saturday
 
 A chance of showers and thunderstorms, mainly after 3pm. Partly sunny, with a high near 87. Southwest wind 5 to 14 mph, with gusts as high as 26 mph. Chance of precipitation is 30%.
Saturday Night
 
 Showers and thunderstorms likely before 9pm, then showers and possibly a thunderstorm between 9pm and 2am, then a chance of showers after 2am. Low around 68. South wind 9 to 11 mph, with gusts as high as 23 mph. Chance of precipitation is 90%.
Sunday
 
 Sunny, with a high near 85. Northwest wind around 10 mph, with gusts as high as 20 mph.
Sunday Night
 
 Clear, with a low around 62. Northwest wind 3 to 5 mph.
Monday
 
 Sunny, with a high near 84. Calm wind becoming west around 6 mph in the afternoon.
Monday Night
 
 Partly cloudy, with a low around 65. Southwest wind around 6 mph.
Tuesday
 
 A chance of showers and thunderstorms. Partly sunny, with a high near 85. South wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.
Tuesday Night
 
 Showers and thunderstorms likely. Mostly cloudy, with a low around 68. South wind 6 to 8 mph. Chance of precipitation is 60%.
Wednesday
 
 Showers likely. Mostly cloudy, with a high near 83. Southwest wind 7 to 9 mph. Chance of precipitation is 60%.
Wednesday Night
 
 Showers likely. Mostly cloudy, with a low around 66. Southwest wind 3 to 5 mph. Chance of precipitation is 60%.
Thursday
 
 A chance of showers. Mostly sunny, with a high near 82.

 

Forecast from NOAA-NWS for Waltham MA.