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    • Today

      Sep 25

      65° /38°F
      Sunshine
      • Very Unlikely
      • for a snow day
      • Snow: 0%
      • Ice: 0%
      • Snow: 0 in
    • Mon

      Sep 26

      67° /52°
      Sunny to partly cloudy
      • Very Unlikely
      • for a snow day
      • Snow: 0%
      • Ice: 0%
      • Snow: 0 in
      More
    • Tue

      Sep 27

      70° /51°
      Rain at times
      • Very Unlikely
      • for a snow day
      • Snow: 0%
      • Ice: 0%
      • Snow: 0 in
      More
    • Wed

      Sep 28

      69° /56°
      Times of clouds and sun
      • Very Unlikely
      • for a snow day
      • Snow: 0%
      • Ice: 0%
      • Snow: 0 in
      More
    • Thu

      Sep 29

      63° /56°
      Chance of a shower
      • Very Unlikely
      • for a snow day
      • Snow: 0%
      • Ice: 0%
      • Snow: 0 in
      More

    Day

    65°Hi RealFeel® 64° Precipitation 4%
    Sunshine
    • NW 10 mph
    • Gusts: 22 mph
    • Max UV Index: 4 (Moderate)
    • Thunderstorms: 2%
    • Precipitation: 0 in
    • Rain: 0 in
    • Snow: 0 in
    • Ice: 0 in
    • Hours of Precipitation: 0 hrs
    • Hours of Rain: 0 hrs

    Night

    38°Lo RealFeel® 40° Precipitation 9%
    Mainly clear and chilly
    • NW 4 mph
    • Gusts: 8 mph
    • Max UV Index: N/A
    • Thunderstorms: 0%
    • Precipitation: 0 in
    • Rain: 0 in
    • Snow: 0 in
    • Ice: 0 in
    • Hours of Precipitation: 0 hrs
    • Hours of Rain: 0 hrs

    Temperature History

    more Historical Weather Data >
      Today Normal Record 9/25/2015
    High 65° 69° N/A 68°
    Low 38° 47° N/A 43°

    Sunrise/Sunset

    • Sunrise: 6:36 AM
    • Sunset: 6:36 PM
    • Duration: 12:00 hr

    Moonrise/Moonset

    • Moonrise: 1:08 AM
    • Moonset: 3:45 PM
    • Duration: 14:37 hr
    Astronomy

    Waltham Weather Report

    Crisp fall air to bring first frost of season to parts of northeastern US

    September 25, 2016; 2:29 PM ET

    Fall air has finally arrived in the northeastern United States and may yield the first frost of the season in parts of the region to end this weekend. More >

    48 Hour Precipitation Forecast

    Sun. Snow Day Potential