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

Manchester Airport (KMHT)

Lat: 42.93°NLon: 71.44°WElev: 223ft.

Overcast

42°F

6°C

Humidity 89%
Wind Speed Calm
Barometer 29.71 in (1007.4 mb)
Dewpoint 39°F (4°C)
Visibility 10.00 mi
Last update 21 Mar 4:53 am EDT
Extended Forecast for

Merrimack NH

  • Today

    Today: Mostly cloudy, then gradually becoming sunny, with a high near 51. Northwest wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 51 °F

    Decreasing
    Clouds

  • Tonight

    Tonight: A 30 percent chance of snow, mainly after 5am. Increasing clouds, with a low around 32. Calm wind.

    Low: 32 °F

    Mostly Cloudy
    then Chance
    Snow

  • Sunday

    Sunday: A chance of snow before 9am, then rain and snow likely between 9am and 10am, then rain after 10am. High near 49. Southeast wind around 5 mph becoming southwest in the afternoon. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.

    High: 49 °F

    Rain/Snow
    Likely then
    Rain

  • Sunday Night

    Sunday Night: Rain before 3am, then snow likely. Low around 30. North wind around 5 mph. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.

    Low: 30 °F

    Rain then
    Rain/Snow
    Likely

  • Monday

    Monday: A 40 percent chance of snow before 2pm. Mostly cloudy, with a high near 40. North wind 5 to 10 mph.

    High: 40 °F

    Chance Snow

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 24.

    Low: 24 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 45.

    High: 45 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 27.

    Low: 27 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 49.

    High: 49 °F

    Partly Sunny

Detailed Forecast

Today
Mostly cloudy, then gradually becoming sunny, with a high near 51. Northwest wind 5 to 10 mph, with gusts as high as 20 mph.
Tonight
A 30 percent chance of snow, mainly after 5am. Increasing clouds, with a low around 32. Calm wind.
Sunday
A chance of snow before 9am, then rain and snow likely between 9am and 10am, then rain after 10am. High near 49. Southeast wind around 5 mph becoming southwest in the afternoon. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.
Sunday Night
Rain before 3am, then snow likely. Low around 30. North wind around 5 mph. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.
Monday
A 40 percent chance of snow before 2pm. Mostly cloudy, with a high near 40. North wind 5 to 10 mph.
Monday Night
Mostly cloudy, with a low around 24.
Tuesday
Sunny, with a high near 45.
Tuesday Night
Mostly cloudy, with a low around 27.
Wednesday
Partly sunny, with a high near 49.
Wednesday Night
Mostly cloudy, with a low around 25.
Thursday
A chance of rain and snow. Partly sunny, with a high near 48. Chance of precipitation is 30%.
Thursday Night
Rain and snow likely. Mostly cloudy, with a low around 31. Chance of precipitation is 60%.
Friday
A chance of rain and snow. Partly sunny, with a high near 45. Chance of precipitation is 40%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Merrimack NH
 42.86°N 71.49°W (Elev. 118 ft)
Last Update:
2:17 am EDT Mar 21, 2026
Forecast Valid:
5am EDT Mar 21, 2026-6pm EDT Mar 27, 2026
 
Forecast Discussion
 
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Additional Resources

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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