Log In
    Favorites
        Member Settings
      Elev 63 ft, 42.834 °N 71.008 °W

      Merrimac, MA

      Merrimacport Station43°
      Updated: 8:00 PM EDT on October 10, 2026 (GMT -4)
      10 minutes ago
      60°
      42°
      43
      Feels Like 43
      Fair
      N
      0
      Similar temperature is expected tomorrow
      Wundermap

      Loading nearby stations…

       Wundermap
      50
      50
      575
      90
      50
      7
      0 mph
      50
      50
      50
      50
      50
      50
      Radar · Now
        Hyper-local data from Weather Underground's network of
        400,000+ personal weather stations worldwide
        Tonight
        Sat 10/10
        Low 40°f
         4% Precip. / 0 in
        Partly cloudy skies. Low around 40F. Winds light and variable.
        Tomorrow
        Sun 10/11
        High 62°f
         19% Precip. / 0 in
        Cloudy skies. High 62F. Winds SSW at 5 to 10 mph.
        Tomorrow night
        Sun 10/11
        Low 51°f
         100% Precip. / 0.61 in
        Rain likely. Potential for heavy rainfall. Low 51F. Winds light and variable. Chance of rain 100%. Rainfall around a half an inch.
        Hourly Forecast
        Now
        45°
        9PM
        44°
        10PM
        43°
        11PM
        43°
        12AM
        44°
        1AM
        42°
        2AM
        42°
        3AM
        43°
        4AM
        42°
        5AM
        41°
        6AM
        41°
        6:52AM
        Sunrise
        7AM
        41°
        8AM
        45°
        9AM
        48°
        10AM
        54°
        11AM
        57°
        12PM
        59°
        1PM
        60°
        2PM
        61°
        3PM
        60°
        4PM
        60°
        5PM
        59°
        6PM
        58°
        6:07PM
        Sunset
        7PM
        50%
        56°
        8PM
        79%
        54°
        Precipitation
        79%
        Pollen
        None
        Air Quality
        30
        Good
        UV Index
        0
        Low
        Additional Conditions
        1. Pressure 30.47 in
        2. Visibility 10 miles
        3. Clouds Partly Cloudy
        4. Dew Point37°F
        5. Humidity 73%
        6. Rainfall 0 in
        7. Snow Depth 0 in
         KLWM Station History
        Almanac for October 10, 2026
        1. Forecast Average Record
        2. Temperature
        3. High 60°F 64°F 88°F 1949
        4. Low 42°F 42°F 27°F 1993
        5. Rain/Snow Depth
        6. Precipitation 0 in 3.3 in -
        7. Snow 0 in 0 in -
        Almanac for October 11, 2026
        1. Forecast Average Record
        2. Temperature
        3. High 62°F 64°F 84°F
        4. Low 40°F 41°F 22°F
        Astronomy
        1. Sun Rise Set
        2. Actual Time 6:51 AM 6:09 PM
        3. Civil Twilight 6:23 AM 6:38 PM
        4. Nautical Twilight 5:50 AM 7:10PM
        5. Astronomical Twilight 5:17 AM 7:43 PM
        1. Length of Visible Light 12h 14m
        2. Length of Day 11h 18m
        3. Tomorrow will be 2 minutes 50 seconds shorter
        1. Moon 6:51 AM 5:50 PM
        2. New0% of the Moon is Illuminated
        Oct 10
        New Moon
        Oct 18
        Waxing Half First Qtr
        Oct 26
        Full Moon
        Nov 1
        Waning Half Last Qtr
        Nearby Weather Stations
        Station Location
        Temp
        Windchill
        Heat Index
        Dew Point
        Humidity
        Wind
        Precip.
        Elev.
        Updated
        Loading nearby stations…
        Precipitation
        Loading…
        Health
        Loading…
        Weather Alerts
        Loading…
        Our AppsAbout UsContactCareers
        PWS NetworkWunderMap
        Trust CenterTerms of UsePrivacy PolicyData RightsPrivacy SettingsCookie NoticeData VendorsAccessibility Statement
        Level Access
        The Weather Company The Weather Channel Weather Underground Storm Radar
        © The Weather Company, LLC 2026
        Glossary