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

80°F

27°C

Humidity 64%
Wind Speed SE 5 mph
Barometer 29.74 in (1007.0 mb)
Dewpoint 67°F (19°C)
Visibility 10.00 mi
Heat Index82°F (28°C)
Last update 28 Jul 12:54 pm EDT
Extended Forecast for

Merrimac MA

  • This Afternoon

    This Afternoon: A chance of showers and thunderstorms. Partly sunny, with a high near 79. Southeast wind around 8 mph. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 79 °F

    Chance
    Showers

  • Tonight

    Tonight: A chance of showers before 8pm, then a slight chance of showers and thunderstorms after 2am. Mostly cloudy, with a low around 61. Southeast wind around 6 mph. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 61 °F

    Chance
    Showers then
    Slight Chance
    T-storms

  • Wednesday

    Wednesday: Showers and thunderstorms likely before 11am, then showers and possibly a thunderstorm between 11am and 4pm, then showers after 4pm. High near 71. East wind 8 to 10 mph, with gusts as high as 23 mph. Chance of precipitation is 100%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 71 °F

    Showers

  • Wednesday Night

    Wednesday Night: Showers and possibly a thunderstorm before 11pm, then showers between 11pm and 5am, then showers and possibly a thunderstorm after 5am. Patchy fog before 9pm. Low around 59. Northeast wind around 8 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 59 °F

    Showers and
    Patchy Fog

  • Thursday

    Thursday: Showers and possibly a thunderstorm. High near 69. Northeast wind around 8 mph. Chance of precipitation is 90%.

    High: 69 °F

    Showers

  • Thursday Night

    Thursday Night: Showers likely and possibly a thunderstorm before 10pm, then a chance of showers and thunderstorms after 10pm. Mostly cloudy, with a low around 59. North wind 3 to 5 mph. Chance of precipitation is 60%.

    Low: 59 °F

    Showers
    Likely

  • Friday

    Friday: A chance of showers. Partly sunny, with a high near 74. Northeast wind around 5 mph. Chance of precipitation is 30%.

    High: 74 °F

    Chance
    Showers

  • Friday Night

    Friday Night: Partly cloudy, with a low around 61. Calm wind.

    Low: 61 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 79. Light and variable wind.

    High: 79 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
A chance of showers and thunderstorms. Partly sunny, with a high near 79. Southeast wind around 8 mph. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tonight
A chance of showers before 8pm, then a slight chance of showers and thunderstorms after 2am. Mostly cloudy, with a low around 61. Southeast wind around 6 mph. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday
Showers and thunderstorms likely before 11am, then showers and possibly a thunderstorm between 11am and 4pm, then showers after 4pm. High near 71. East wind 8 to 10 mph, with gusts as high as 23 mph. Chance of precipitation is 100%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
Showers and possibly a thunderstorm before 11pm, then showers between 11pm and 5am, then showers and possibly a thunderstorm after 5am. Patchy fog before 9pm. Low around 59. Northeast wind around 8 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Thursday
Showers and possibly a thunderstorm. High near 69. Northeast wind around 8 mph. Chance of precipitation is 90%.
Thursday Night
Showers likely and possibly a thunderstorm before 10pm, then a chance of showers and thunderstorms after 10pm. Mostly cloudy, with a low around 59. North wind 3 to 5 mph. Chance of precipitation is 60%.
Friday
A chance of showers. Partly sunny, with a high near 74. Northeast wind around 5 mph. Chance of precipitation is 30%.
Friday Night
Partly cloudy, with a low around 61. Calm wind.
Saturday
Mostly sunny, with a high near 79. Light and variable wind.
Saturday Night
Partly cloudy, with a low around 64. Calm wind.
Sunday
Mostly sunny, with a high near 84. Calm wind becoming south around 5 mph in the afternoon.
Sunday Night
A chance of showers. Mostly cloudy, with a low around 65. Light south wind. Chance of precipitation is 30%.
Monday
A chance of showers. Partly sunny, with a high near 80. Southwest wind 3 to 5 mph. 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:
12:29 am EDT Jul 28, 2026
Forecast Valid:
1pm EDT Jul 28, 2026-6pm EDT Aug 3, 2026
 
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