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    • Today

      Sep 25

      64° /37°
      Sunshine
      • Beneficial
      • weather for sinus headaches
      • Hi RealFeel: 65°
      • UV: 4 - Moderate
      • Cloud Cover: 7%
      More
    • Mon

      Sep 26

      67° /51°F
      Sunny to partly cloudy
      • Beneficial
      • weather for sinus headaches
      • Hi RealFeel: 74°
      • UV: 4 - Moderate
      • Cloud Cover: 17%
    • Tue

      Sep 27

      69° /52°
      Rain at times
      • Neutral
      • weather for sinus headaches
      • Hi RealFeel: 67°
      • UV: 2 - Low
      • Cloud Cover: 94%
      More
    • Wed

      Sep 28

      71° /56°
      Clouds and sunshine
      • Beneficial
      • weather for sinus headaches
      • Hi RealFeel: 73°
      • UV: 4 - Moderate
      • Cloud Cover: 64%
      More
    • Thu

      Sep 29

      66° /50°
      Pleasant with variable clouds
      • Neutral
      • weather for sinus headaches
      • Hi RealFeel: 66°
      • UV: 4 - Moderate
      • Cloud Cover: 70%
      More

    Day

    67°Hi RealFeel® 74° Precipitation 9%
    Sunny to partly cloudy
    • SSW 4 mph
    • Gusts: 7 mph
    • Max UV Index: 4 (Moderate)
    • Thunderstorms: 3%
    • Precipitation: 0 in
    • Rain: 0 in
    • Snow: 0 in
    • Ice: 0 in
    • Hours of Precipitation: 0 hrs
    • Hours of Rain: 0 hrs

    Night

    51°Lo RealFeel® 50° Precipitation 71%
    Increasing cloudiness with a little rain late
    • SSE 5 mph
    • Gusts: 8 mph
    • Max UV Index: N/A
    • Thunderstorms: 1%
    • Precipitation: 0.16 in
    • Rain: 0.16 in
    • Snow: 0 in
    • Ice: 0 in
    • Hours of Precipitation: 2 hrs
    • Hours of Rain: 2 hrs

    Temperature History

    more Historical Weather Data >
      Today Normal Record 9/26/2015
    High 67° 69° N/A 65°
    Low 51° 47° N/A 37°

    Sunrise/Sunset

    • Sunrise: 6:37 AM
    • Sunset: 6:34 PM
    • Duration: 11:57 hr

    Moonrise/Moonset

    • Moonrise: 2:08 AM
    • Moonset: 4:24 PM
    • Duration: 14:16 hr
    Astronomy

    Waltham Weather Report

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

    September 25, 2016; 4:09 AM 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 this weekend. More >

    Mon. Sinus Headache

    Mon. UV Index