Massachusetts · NWS BOX office

Waltham, MA weather

It is 28°F and clear at Laurence G Hanscom Field Airport as of Oct 28, 2:10 AM EDT. Overnight: Areas Of Frost, low near 30°F. Forecast from the National Weather Service, issued Oct 27, 8:22 PM EDT.

Updated Oct 28, 2:21 AM EDT (snapshot)

Current conditions

Temperature

28°F

Clear

Wind

Calm

Humidity 93% · dew point 27°F

Pressure · visibility

30.45 inHg

Visibility 10 mi

Observed at Laurence G Hanscom Field Airport (KBED), Oct 28, 2:10 AM EDT. Station readings can lag or be missing.

Alerts for this area

No active NWS alerts cover the Waltham forecast zone right now.

Around the NWS BOX forecast area

No active alerts in zones served by the BOX office near Waltham.

From the alert snapshot of Oct 28, 2026, 2:15 AM EDT. No alerts are active anywhere in Massachusetts.

For official warnings, check weather.gov and your local authorities. OpenForecast repeats National Weather Service alerts and may be delayed or incomplete. Follow instructions from emergency officials.

Next 24 hours

Hourly forecast for Waltham (local time)
TimeTempForecastPrecip. chanceWind
Wed 2 AM33°FPatchy Frost0%W 2 mph
Wed 3 AM32°FAreas Of Frost0%NW 2 mph
Wed 4 AM31°FAreas Of Frost0%NW 1 mph
Wed 5 AM31°FAreas Of Frost0%NW 1 mph
Wed 6 AM30°FAreas Of Frost0%NW 1 mph
Wed 7 AM30°FAreas Of Frost0%NW 2 mph
Wed 8 AM31°FAreas Of Frost2%NW 2 mph
Wed 9 AM35°FSunny2%NW 2 mph
Wed 10 AM41°FPartly Sunny2%SW 3 mph
Wed 11 AM46°FMostly Cloudy2%SW 3 mph
Wed 12 PM49°FMostly Cloudy2%S 5 mph
Wed 1 PM52°FPartly Sunny2%S 6 mph
Wed 2 PM54°FMostly Cloudy2%S 7 mph
Wed 3 PM55°FPartly Sunny3%S 7 mph
Wed 4 PM55°FPartly Sunny3%S 6 mph
Wed 5 PM54°FPartly Sunny3%S 6 mph
Wed 6 PM50°FPartly Cloudy3%S 6 mph
Wed 7 PM46°FMostly Clear2%S 7 mph
Wed 8 PM45°FMostly Clear0%SW 7 mph
Wed 9 PM44°FMostly Clear0%SW 7 mph
Wed 10 PM42°FMostly Clear0%SW 6 mph
Wed 11 PM42°FMostly Clear0%SW 6 mph
Thu 12 AM41°FMostly Clear0%SW 6 mph
Thu 1 AM41°FMostly Clear0%SW 6 mph

Hourly values come from the NWS gridded forecast for the 2.5 km grid square that covers the city's center point. Conditions elsewhere in Waltham can differ.

7-day forecast

Overnight

Low 30°F

Areas of frost. Mostly clear, with a low around 30. Northwest wind around 2 mph.

Wednesday

High 56°F·Low 39°F

Areas of frost before 9am. Mostly sunny, with a high near 56. Southwest wind 1 to 7 mph.

Wednesday Night: Mostly clear, with a low around 39. Southwest wind around 7 mph.

Thursday

High 68°F·Low 55°F

Sunny, with a high near 68. Southwest wind 5 to 9 mph.

Thursday Night: Mostly clear, with a low around 55. Southwest wind around 8 mph.

Friday

High 70°F·Low 41°F

Sunny, with a high near 70. West wind 6 to 10 mph, with gusts as high as 21 mph.

Friday Night: Mostly clear, with a low around 41. Northwest wind 3 to 7 mph.

Saturday

High 59°F·Low 36°F

Sunny, with a high near 59. Northwest wind 3 to 7 mph.

Saturday Night: Mostly clear, with a low around 36. Northwest wind around 3 mph.

Sunday

High 62°F·Low 46°F

Mostly sunny, with a high near 62. Southwest wind 2 to 6 mph.

Sunday Night: Partly cloudy, with a low around 46. Southwest wind around 5 mph.

Monday

High 65°F·Low 47°F

A chance of rain showers. Partly sunny, with a high near 65. Southwest wind around 7 mph. Chance of precipitation is 30%.

Monday Night: A chance of rain showers. Mostly cloudy, with a low around 47. Northwest wind around 7 mph. Chance of precipitation is 40%.

Tuesday

High 59°F

A chance of rain showers before 5pm, then a chance of rain. Partly sunny, with a high near 59. Northeast wind around 9 mph.

Nearby cities

Larger cities in the area

Other cities in Middlesex County

See every city we cover in Massachusetts, or check all active alerts.

About this forecast

Forecast office
Waltham is served by the National Weather Service BOX forecast office, forecast zone MAZ014, county zone MAC017.
Location used
The Census Bureau's internal point for Waltham (42.3889, -71.2423), in Middlesex County. Population: 65,849 (2024 estimate), number 17 of the 50 Massachusetts cities on this site.
Radar
Nearest NWS radar: KBOX. View it on radar.weather.gov.

On Amazon

Weather-ready picks

As an Amazon Associate I earn from qualifying purchases.

Home & kitchen LEVOIT Air Purifier An air purifier for smoky or high-pollen days indoors. View on Amazon → Men’s fashion Hanes Fleece Hooded Sweatshirt A warm hoodie for chilly mornings. View on Amazon → Fitness & outdoors Stanley Quencher H2.0 Tumbler A big tumbler for long commutes and outdoor days. View on Amazon → Fitness & outdoors LifeStraw Personal Water Filter A personal water filter worth adding to an emergency kit. View on Amazon →

Sources

  • Forecast, hourly forecast, observations and alerts: National Weather Service API, api.weather.gov/points/42.3889,-71.2423 (forecast issued Oct 27, 8:22 PM EDT).
  • Official forecast page: forecast.weather.gov.
  • City location and population: U.S. Census Bureau, Vintage 2024 population estimates and 2024 Gazetteer files.
  • Snapshot taken Oct 28, 2026. The NWS and Census Bureau do not endorse OpenForecast.

More Massachusetts cities