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Personalized Forecasts

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    • Today

      Sep 25

      65° /41°F
      Sunshine
      • Beneficial
      • weather for migraines
      • Hi RealFeel: 64°
      • UV: 4 - Moderate
      • Cloud Cover: 9%
    • Mon

      Sep 26

      67° /49°
      Sunny to partly cloudy
      • Beneficial
      • weather for migraines
      • Hi RealFeel: 73°
      • UV: 4 - Moderate
      • Cloud Cover: 17%
      More
    • Tue

      Sep 27

      69° /52°
      Periods of rain
      • Beneficial
      • weather for migraines
      • Hi RealFeel: 67°
      • UV: 2 - Low
      • Cloud Cover: 96%
      More
    • Wed

      Sep 28

      71° /56°
      Times of clouds and sun
      • Beneficial
      • weather for migraines
      • Hi RealFeel: 73°
      • UV: 4 - Moderate
      • Cloud Cover: 66%
      More
    • Thu

      Sep 29

      69° /56°
      Mostly cloudy
      • Beneficial
      • weather for migraines
      • Hi RealFeel: 70°
      • UV: 4 - Moderate
      • Cloud Cover: 77%
      More
    62°/46° RealFeel® 62°/44°
    Sunny
    • 9 mph
    • Precipitation: 7%
    • Rain: 0 in
    • Snow: 0 in
    • Humidity: 47%
    • Cloud Cover: 9%
    • Dew Point: 34° F
    • Visibility: 9 mi

    Temperature History

    more Historical Weather Data >
      Today Normal Record 9/25/2015
    High 65° 69° N/A 68°
    Low 41° 47° N/A 43°

    Sunrise/Sunset

    • Sunrise: 6:37 AM
    • Sunset: 6:36 PM
    • Duration: 11:59 hr

    Moonrise/Moonset

    • Moonrise: 1:08 AM
    • Moonset: 3:46 PM
    • Duration: 14:38 hr
    Astronomy

    Chelmsford Weather Report

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

    September 25, 2016; 10:29 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 to end this weekend. More >

    Sun. Migraine Headache

    Sun. UV Index