National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

Lawrence Municipal Airport (KLWM)

Lat: 42.71°NLon: 71.13°WElev: 135ft.

Mostly Cloudy

69°F

21°C

Humidity 78%
Wind Speed E 7 mph
Barometer 30.19 in (1022.3 mb)
Dewpoint 62°F (17°C)
Visibility 10.00 mi
Last update 2 Sep 12:54 pm EDT
Extended Forecast for

Merrimac MA

  • This Afternoon

    This Afternoon: Mostly cloudy, with a high near 72. East wind around 6 mph.

    High: 72 °F

    Mostly Cloudy

  • Tonight

    Tonight: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 4am. Mostly cloudy, with a low around 58. Light southeast wind. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 58 °F

    Mostly Cloudy
    then Showers
    Likely

  • Thursday

    Thursday: Showers and possibly a thunderstorm, mainly before 11am, then a chance of showers and thunderstorms after 11am. Patchy fog before 1pm. High near 76. South wind around 6 mph becoming west in the afternoon. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    High: 76 °F

    Showers and
    Patchy Fog
    then Chance
    Showers and
    Patchy Fog

  • Thursday Night

    Thursday Night: A slight chance of showers between 10pm and 1am. Partly cloudy, with a low around 61. Calm wind. Chance of precipitation is 20%.

    Low: 61 °F

    Slight Chance
    Showers

  • Friday

    Friday: Sunny, with a high near 80. Northwest wind around 6 mph.

    High: 80 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 58. Northwest wind around 5 mph.

    Low: 58 °F

    Mostly Clear

  • Saturday

    Saturday: A chance of showers after 2pm. Mostly sunny, with a high near 72. Northeast wind around 6 mph. Chance of precipitation is 30%.

    High: 72 °F

    Mostly Sunny
    then Chance
    Showers

  • Saturday Night

    Saturday Night: A chance of showers before 8pm. Partly cloudy, with a low around 54. Light north wind. Chance of precipitation is 30%.

    Low: 54 °F

    Chance
    Showers then
    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 71. North wind around 6 mph.

    High: 71 °F

    Sunny

Detailed Forecast

This Afternoon
Mostly cloudy, with a high near 72. East wind around 6 mph.
Tonight
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 4am. Mostly cloudy, with a low around 58. Light southeast wind. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday
Showers and possibly a thunderstorm, mainly before 11am, then a chance of showers and thunderstorms after 11am. Patchy fog before 1pm. High near 76. South wind around 6 mph becoming west in the afternoon. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Thursday Night
A slight chance of showers between 10pm and 1am. Partly cloudy, with a low around 61. Calm wind. Chance of precipitation is 20%.
Friday
Sunny, with a high near 80. Northwest wind around 6 mph.
Friday Night
Mostly clear, with a low around 58. Northwest wind around 5 mph.
Saturday
A chance of showers after 2pm. Mostly sunny, with a high near 72. Northeast wind around 6 mph. Chance of precipitation is 30%.
Saturday Night
A chance of showers before 8pm. Partly cloudy, with a low around 54. Light north wind. Chance of precipitation is 30%.
Sunday
Sunny, with a high near 71. North wind around 6 mph.
Sunday Night
Mostly clear, with a low around 53. Calm wind.
Labor Day
Sunny, with a high near 76. Light and variable wind.
Monday Night
Partly cloudy, with a low around 56. Light west wind.
Tuesday
Mostly sunny, with a high near 77. West wind 3 to 5 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Merrimac MA
 42.84°N 71.01°W (Elev. 135 ft)
Last Update:
7:41 am EDT Sep 2, 2026
Forecast Valid:
1pm EDT Sep 2, 2026-6pm EDT Sep 8, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation