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

Summer Heat In Multiple Spots

A large dome of high pressure is expected to deliver summer heat with humidity in multiple sections of the country to start off the week. Excessive heat warnings and heat advisories are in effect across the south-central Plains, Mid to Lower Mississippi Valley and from the Mid-Atlantic into the Northeast. This includes the cities of New York, Philadelphia, Dallas, Oklahoma City and Kansas City. Read More >

Hazardous Weather Conditions

Current conditions at

Manchester Airport (KMHT)

Lat: 42.93°NLon: 71.44°WElev: 223ft.

Mostly Cloudy

75°F

24°C

Humidity 84%
Wind Speed SE 6 mph
Barometer 29.96 in (1015.4 mb)
Dewpoint 70°F (21°C)
Visibility 10.00 mi
Last update 18 Aug 9:53 pm EDT
Extended Forecast for

Merrimack NH

  • Tonight

    Tonight: Showers and thunderstorms likely before 4am, then a chance of showers. Patchy fog after 3am. Otherwise, mostly cloudy, with a low around 70. Southeast wind around 5 mph becoming calm after midnight. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    T-storms
    Likely and
    Patchy Fog

    Low: 70 °F

  • Monday

    Monday: Patchy fog before 9am. Otherwise, mostly cloudy, then gradually becoming sunny and hot, with a high near 91. Heat index values as high as 97. Light and variable wind becoming west 10 to 15 mph in the afternoon.

    Patchy Fog
    then Mostly
    Sunny

    High: 91 °F

  • Monday
    Night

    Monday Night: A 40 percent chance of showers before midnight. Partly cloudy, with a low around 70. West wind 5 to 10 mph. New precipitation amounts of less than a tenth of an inch possible.

    Chance
    Showers then
    Partly Cloudy

    Low: 70 °F

  • Tuesday

    Tuesday: A 30 percent chance of showers and thunderstorms after 3pm. Mostly sunny and hot, with a high near 90. Northwest wind around 5 mph becoming calm.

    Sunny then
    Chance
    T-storms

    High: 90 °F

  • Tuesday
    Night

    Tuesday Night: A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 65. Calm wind.

    Chance
    T-storms

    Low: 65 °F

  • Wednesday

    Wednesday: A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 87.

    Chance
    T-storms

    High: 87 °F

  • Wednesday
    Night

    Wednesday Night: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 68.

    Chance
    T-storms

    Low: 68 °F

  • Thursday

    Thursday: A chance of showers and thunderstorms. Partly sunny, with a high near 86. Chance of precipitation is 40%.

    Chance
    T-storms then
    Chance
    Showers

    High: 86 °F

  • Thursday
    Night

    Thursday Night: A 40 percent chance of showers before 9pm. Partly cloudy, with a low around 57.

    Chance
    Showers then
    Partly Cloudy

    Low: 57 °F

Detailed Forecast

Tonight
Showers and thunderstorms likely before 4am, then a chance of showers. Patchy fog after 3am. Otherwise, mostly cloudy, with a low around 70. Southeast wind around 5 mph becoming calm after midnight. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Monday
Patchy fog before 9am. Otherwise, mostly cloudy, then gradually becoming sunny and hot, with a high near 91. Heat index values as high as 97. Light and variable wind becoming west 10 to 15 mph in the afternoon.
Monday Night
A 40 percent chance of showers before midnight. Partly cloudy, with a low around 70. West wind 5 to 10 mph. New precipitation amounts of less than a tenth of an inch possible.
Tuesday
A 30 percent chance of showers and thunderstorms after 3pm. Mostly sunny and hot, with a high near 90. Northwest wind around 5 mph becoming calm.
Tuesday Night
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 65. Calm wind.
Wednesday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 87.
Wednesday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 68.
Thursday
A chance of showers and thunderstorms. Partly sunny, with a high near 86. Chance of precipitation is 40%.
Thursday Night
A 40 percent chance of showers before 9pm. Partly cloudy, with a low around 57.
Friday
Sunny, with a high near 78.
Friday Night
Mostly clear, with a low around 55.
Saturday
Sunny, with a high near 80.
Saturday Night
Mostly clear, with a low around 56.
Sunday
Mostly sunny, with a high near 82.
Click Map For Forecast
Disclaimer
Map Legend
Point Forecast:
Merrimack NH
 42.86°N 71.49°W (Elev. 118 ft)
Last Update:
9:37 pm EDT Aug 18, 2019
Forecast Valid:
10pm EDT Aug 18, 2019-6pm EDT Aug 25, 2019
 
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