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.

Overcast

70°F

21°C

Humidity 87%
Wind Speed S 6 mph
Barometer 30.09 in (1018.8 mb)
Dewpoint 66°F (19°C)
Visibility 10.00 mi
Last update 14 Jul 4:54 am EDT
Extended Forecast for

Merrimac MA

  • Today

    Today: A slight chance of showers between 1pm and 2pm, then a chance of showers and thunderstorms after 2pm. Patchy fog before 7am. Otherwise, partly sunny, with a high near 85. South wind 3 to 6 mph. Chance of precipitation is 40%. New rainfall amounts between a quarter and half of an inch possible.

    High: 85 °F

    Patchy Fog
    then Chance
    T-storms

  • Tonight

    Tonight: A chance of showers and thunderstorms before 11pm, then a slight chance of showers between 11pm and 1am. Mostly cloudy, with a low around 69. Light southwest wind. Chance of precipitation is 30%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 69 °F

    Chance
    T-storms then
    Slight Chance
    Showers

  • Tuesday

    Tuesday: Mostly cloudy, then gradually becoming sunny, with a high near 88. Light southwest wind.

    High: 88 °F

    Decreasing
    Clouds

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 69. Light southwest wind.

    Low: 69 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny and hot, with a high near 91. Calm wind becoming south around 5 mph in the afternoon.

    High: 91 °F

    Hot

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 72. Southwest wind around 5 mph.

    Low: 72 °F

    Partly Cloudy

  • Thursday

    Thursday: A chance of showers between noon and 2pm, then a chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 88. South wind 5 to 7 mph. Chance of precipitation is 30%.

    High: 88 °F

    Partly Sunny
    then Chance
    T-storms

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms before 8pm, then a chance of showers between 8pm and 9pm. Partly cloudy, with a low around 72. Southwest wind around 5 mph. Chance of precipitation is 30%.

    Low: 72 °F

    Chance
    T-storms then
    Partly Cloudy

  • Friday

    Friday: A chance of showers between 1pm and 2pm, then a chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 87. West wind 5 to 7 mph. Chance of precipitation is 40%.

    High: 87 °F

    Mostly Sunny
    then Chance
    T-storms

Detailed Forecast

Today
A slight chance of showers between 1pm and 2pm, then a chance of showers and thunderstorms after 2pm. Patchy fog before 7am. Otherwise, partly sunny, with a high near 85. South wind 3 to 6 mph. Chance of precipitation is 40%. New rainfall amounts between a quarter and half of an inch possible.
Tonight
A chance of showers and thunderstorms before 11pm, then a slight chance of showers between 11pm and 1am. Mostly cloudy, with a low around 69. Light southwest wind. Chance of precipitation is 30%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tuesday
Mostly cloudy, then gradually becoming sunny, with a high near 88. Light southwest wind.
Tuesday Night
Mostly clear, with a low around 69. Light southwest wind.
Wednesday
Sunny and hot, with a high near 91. Calm wind becoming south around 5 mph in the afternoon.
Wednesday Night
Partly cloudy, with a low around 72. Southwest wind around 5 mph.
Thursday
A chance of showers between noon and 2pm, then a chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 88. South wind 5 to 7 mph. Chance of precipitation is 30%.
Thursday Night
A chance of showers and thunderstorms before 8pm, then a chance of showers between 8pm and 9pm. Partly cloudy, with a low around 72. Southwest wind around 5 mph. Chance of precipitation is 30%.
Friday
A chance of showers between 1pm and 2pm, then a chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 87. West wind 5 to 7 mph. Chance of precipitation is 40%.
Friday Night
A chance of showers and thunderstorms before 8pm, then a chance of showers between 8pm and 11pm. Partly cloudy, with a low around 66. Light northwest wind. Chance of precipitation is 30%.
Saturday
Mostly sunny, with a high near 80. Light and variable wind becoming north around 5 mph in the morning.
Saturday Night
Partly cloudy, with a low around 63. Light and variable wind.
Sunday
Mostly sunny, with a high near 81. Calm wind becoming south around 6 mph in the afternoon.
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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:
2:05 am EDT Jul 14, 2025
Forecast Valid:
5am EDT Jul 14, 2025-6pm EDT Jul 20, 2025
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation