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

80°F

27°C

Humidity 71%
Wind Speed Vrbl 7 mph
Barometer 29.98 in (1015.3 mb)
Dewpoint 70°F (21°C)
Visibility 10.00 mi
Heat Index83°F (28°C)
Last update 30 Jun 5:54 pm 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

  • Tonight

    Tonight: A slight chance of showers, then a chance of showers and thunderstorms after 8pm. Mostly cloudy, with a low around 69. Southwest wind around 6 mph. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 69 °F

    Chance
    Showers

  • Wednesday

    Wednesday: Mostly sunny and hot, with a high near 97. Heat index values as high as 107. West wind around 7 mph.

    High: 97 °F

    Hot

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 76. Southwest wind around 6 mph.

    Low: 76 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny and hot, with a high near 101. Heat index values as high as 111. West wind around 7 mph.

    High: 101 °F

    Hot

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 79. West wind around 5 mph.

    Low: 79 °F

    Mostly Clear

  • Friday

    Friday: A slight chance of showers after 3pm. Sunny and hot, with a high near 100. West wind 6 to 8 mph. Chance of precipitation is 20%.

    High: 100 °F

    Sunny then
    Slight Chance
    Showers

  • Friday Night

    Friday Night: Mostly clear, with a low around 75. Light west wind.

    Low: 75 °F

    Mostly Clear

  • Independence Day

    Independence Day: A chance of showers and thunderstorms after 4pm. Mostly sunny and hot, with a high near 93. West wind around 6 mph. Chance of precipitation is 30%.

    High: 93 °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 69. Calm wind. Chance of precipitation is 30%.

    Low: 69 °F

    Chance
    T-storms then
    Partly Cloudy

Detailed Forecast

Tonight
A slight chance of showers, then a chance of showers and thunderstorms after 8pm. Mostly cloudy, with a low around 69. Southwest wind around 6 mph. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday
Mostly sunny and hot, with a high near 97. Heat index values as high as 107. West wind around 7 mph.
Wednesday Night
Mostly clear, with a low around 76. Southwest wind around 6 mph.
Thursday
Sunny and hot, with a high near 101. Heat index values as high as 111. West wind around 7 mph.
Thursday Night
Mostly clear, with a low around 79. West wind around 5 mph.
Friday
A slight chance of showers after 3pm. Sunny and hot, with a high near 100. West wind 6 to 8 mph. Chance of precipitation is 20%.
Friday Night
Mostly clear, with a low around 75. Light west wind.
Independence Day
A chance of showers and thunderstorms after 4pm. Mostly sunny and hot, with a high near 93. West wind around 6 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 69. Calm wind. Chance of precipitation is 30%.
Sunday
Mostly sunny, with a high near 85. Light and variable wind becoming east around 6 mph in the morning.
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 81. 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 63. Light and variable wind. Chance of precipitation is 30%.
Tuesday
Mostly sunny, with a high near 80. 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 70.99°W (Elev. 98 ft)
Last Update:
3:34 pm EDT Jun 30, 2026
Forecast Valid:
6pm EDT Jun 30, 2026-6pm EDT Jul 7, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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