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

72°F

22°C

Humidity 50%
Wind Speed W 17 G 29 mph
Barometer 29.60 in (1002.2 mb)
Dewpoint 52°F (11°C)
Visibility 10.00 mi
Last update 20 Jun 10:54 am EDT
Extended Forecast for

Merrimac MA

  • Today

    Today: A slight chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 78. Northwest wind around 14 mph, with gusts as high as 32 mph. Chance of precipitation is 20%.

    High: 78 °F

    Slight Chance
    T-storms

  • Tonight

    Tonight: Partly cloudy, with a low around 58. West wind 3 to 7 mph.

    Low: 58 °F

    Partly Cloudy

  • Sunday

    Sunday: A slight chance of showers between 1pm and 2pm, then a chance of showers and thunderstorms after 2pm. Increasing clouds, with a high near 80. West wind around 5 mph. Chance of precipitation is 40%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 80 °F

    Sunny then
    Chance
    T-storms

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 58. Calm wind.

    Low: 58 °F

    Partly Cloudy

  • Monday

    Monday: Showers likely, mainly after 3pm. Partly sunny, with a high near 75. Calm wind becoming south around 6 mph in the afternoon. Chance of precipitation is 60%.

    High: 75 °F

    Slight Chance
    Showers then
    Showers
    Likely

  • Monday Night

    Monday Night: Showers and possibly a thunderstorm before 2am, then showers likely. Low around 58. East wind around 7 mph. Chance of precipitation is 90%.

    Low: 58 °F

    Showers

  • Tuesday

    Tuesday: A chance of showers before 8am. Mostly sunny, with a high near 80. Northwest wind around 7 mph. Chance of precipitation is 30%.

    High: 80 °F

    Chance
    Showers then
    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 60. Light northwest wind.

    Low: 60 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 83. Northwest wind 3 to 5 mph.

    High: 83 °F

    Sunny

Detailed Forecast

Today
A slight chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 78. Northwest wind around 14 mph, with gusts as high as 32 mph. Chance of precipitation is 20%.
Tonight
Partly cloudy, with a low around 58. West wind 3 to 7 mph.
Sunday
A slight chance of showers between 1pm and 2pm, then a chance of showers and thunderstorms after 2pm. Increasing clouds, with a high near 80. West wind around 5 mph. Chance of precipitation is 40%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Sunday Night
Partly cloudy, with a low around 58. Calm wind.
Monday
Showers likely, mainly after 3pm. Partly sunny, with a high near 75. Calm wind becoming south around 6 mph in the afternoon. Chance of precipitation is 60%.
Monday Night
Showers and possibly a thunderstorm before 2am, then showers likely. Low around 58. East wind around 7 mph. Chance of precipitation is 90%.
Tuesday
A chance of showers before 8am. Mostly sunny, with a high near 80. Northwest wind around 7 mph. Chance of precipitation is 30%.
Tuesday Night
Mostly clear, with a low around 60. Light northwest wind.
Wednesday
Sunny, with a high near 83. Northwest wind 3 to 5 mph.
Wednesday Night
Mostly clear, with a low around 61. Light and variable wind.
Thursday
Mostly sunny, with a high near 81. Calm wind becoming southeast around 6 mph in the afternoon.
Thursday Night
A chance of showers. Mostly cloudy, with a low around 60. Light south wind. Chance of precipitation is 30%.
Friday
A chance of showers. Partly sunny, with a high near 79. Calm wind becoming southeast around 6 mph in the afternoon. Chance of precipitation is 50%.
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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:
4:30 am EDT Jun 20, 2026
Forecast Valid:
11am EDT Jun 20, 2026-6pm EDT Jun 26, 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