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

Hazardous Weather Conditions

Current conditions at

Lawrence Municipal Airport (KLWM)

Lat: 42.71°NLon: 71.13°WElev: 135ft.

A Few Clouds

73°F

23°C

Humidity 84%
Wind Speed S 7 mph
Barometer 29.98 in (1014.9 mb)
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Last update 1 Jul 12:54 am EDT
Extended Forecast for

Merrimac MA

Extreme Heat Warning July 1, 10:00am until July 4, 08:00pm
Click here for hazard details and duration
Extreme Heat Warning

  • Overnight

    Overnight: Scattered showers and thunderstorms, mainly after 4am. Mostly cloudy, with a low around 69. Southwest wind around 7 mph. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 69 °F

    Scattered
    Showers

  • Wednesday

    Wednesday: Scattered showers and thunderstorms before 9am. Partly sunny and hot, with a high near 96. Heat index values as high as 105. Southwest wind around 8 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 96 °F

    Scattered
    Showers then
    Partly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 77. Southwest wind around 9 mph.

    Low: 77 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny and hot, with a high near 103. Heat index values as high as 112. West wind around 9 mph, with gusts as high as 21 mph.

    High: 103 °F

    Hot

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 76. West wind around 8 mph.

    Low: 76 °F

    Mostly Clear

  • Friday

    Friday: A slight chance of showers after 3pm. Mostly sunny and hot, with a high near 102. West wind 8 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.

    High: 102 °F

    Sunny then
    Slight Chance
    Showers

  • Friday Night

    Friday Night: Mostly clear, with a low around 73. West wind 5 to 9 mph becoming light northwest in the evening.

    Low: 73 °F

    Mostly Clear

  • Independence Day

    Independence Day: A chance of showers and thunderstorms after 4pm. Mostly sunny and hot, with a high near 97. West wind 5 to 7 mph. Chance of precipitation is 30%.

    High: 97 °F

    Sunny then
    Chance
    T-storms

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms before 8pm, then a chance of showers between 8pm and 9pm. Partly cloudy, with a low around 76. Calm wind. Chance of precipitation is 30%.

    Low: 76 °F

    Chance
    T-storms then
    Partly Cloudy

Detailed Forecast

Overnight
Scattered showers and thunderstorms, mainly after 4am. Mostly cloudy, with a low around 69. Southwest wind around 7 mph. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday
Scattered showers and thunderstorms before 9am. Partly sunny and hot, with a high near 96. Heat index values as high as 105. Southwest wind around 8 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
Partly cloudy, with a low around 77. Southwest wind around 9 mph.
Thursday
Sunny and hot, with a high near 103. Heat index values as high as 112. West wind around 9 mph, with gusts as high as 21 mph.
Thursday Night
Mostly clear, with a low around 76. West wind around 8 mph.
Friday
A slight chance of showers after 3pm. Mostly sunny and hot, with a high near 102. West wind 8 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
Friday Night
Mostly clear, with a low around 73. West wind 5 to 9 mph becoming light northwest in the evening.
Independence Day
A chance of showers and thunderstorms after 4pm. Mostly sunny and hot, with a high near 97. West wind 5 to 7 mph. Chance of precipitation is 30%.
Saturday Night
A chance of showers and thunderstorms before 8pm, then a chance of showers between 8pm and 9pm. Partly cloudy, with a low around 76. Calm wind. Chance of precipitation is 30%.
Sunday
Mostly sunny, with a high near 87. Calm wind becoming east around 6 mph in the afternoon.
Sunday Night
A chance of showers. Mostly cloudy, with a low around 65. Calm wind. Chance of precipitation is 30%.
Monday
A chance of showers. Partly sunny, with a high near 85. Calm wind becoming east around 5 mph in the afternoon. Chance of precipitation is 30%.
Monday Night
A chance of showers. Partly cloudy, with a low around 64. Light and variable wind. Chance of precipitation is 30%.
Tuesday
Mostly sunny, with a high near 87. Calm wind becoming east around 6 mph in the afternoon.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Merrimac MA
 42.84°N 71.01°W (Elev. 135 ft)
Last Update:
10:27 pm EDT Jun 30, 2026
Forecast Valid:
1am EDT Jul 1, 2026-6pm EDT Jul 7, 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