| National Weather Service Forecast for:
Waltham MA Issued by: National Weather Service Norton, MA |
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| Updated: 12:46 am EDT Jun 30, 2026 | ||||||||||||||||||
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| Overnight |
Mostly clear, with a low around 62. Light southwest wind. |
| Tuesday |
Mostly sunny and hot, with a high near 90. Light southwest wind increasing to 5 to 10 mph in the morning. |
| Tuesday Night |
A chance of showers and thunderstorms after 9pm. Mostly cloudy, with a low around 70. Southwest wind 11 to 13 mph. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms. |
| Wednesday |
A slight chance of showers and thunderstorms before 8am, then a slight chance of showers and thunderstorms after 3pm. Mostly sunny and hot, with a high near 98. Heat index values as high as 107. West wind around 14 mph. Chance of precipitation is 20%. |
| Wednesday Night |
A chance of showers and thunderstorms, mainly before 1am. Partly cloudy, with a low around 76. Southwest wind 5 to 8 mph. Chance of precipitation is 30%. |
| Thursday |
Sunny and hot, with a high near 101. West wind 7 to 9 mph. |
| Thursday Night |
Clear, with a low around 76. West wind 5 to 9 mph. |
| Friday |
Sunny and hot, with a high near 100. West wind 6 to 11 mph, with gusts as high as 21 mph. |
| Friday Night |
Mostly clear, with a low around 73. West wind 5 to 7 mph. |
| Independence Day |
A chance of showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 96. West wind 5 to 9 mph. Chance of precipitation is 40%. |
| Saturday Night |
A chance of showers and thunderstorms. Partly cloudy, with a low around 71. West wind 3 to 5 mph. Chance of precipitation is 30%. |
| Sunday |
Mostly sunny, with a high near 88. North wind 3 to 8 mph. |
| Sunday Night |
Partly cloudy, with a low around 66. Southeast wind around 5 mph becoming calm in the evening. |
| Monday |
Partly sunny, with a high near 87. East wind 3 to 8 mph. |
Forecast from NOAA-NWS for Waltham MA.
