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

Hazardous Weather Conditions

Current conditions at

Nashua - Boire Field Airport (KASH)

Lat: 42.78°NLon: 71.51°WElev: 180ft.

Fair

72°F

22°C

Humidity 91%
Wind Speed Calm
Barometer 30.05 in (1017.3 mb)
Dewpoint 69°F (21°C)
Visibility 10.00 mi
Last update 16 Jul 1:56 am EDT
Extended Forecast for

2 Miles WSW Merrimack NH

Heat Advisory July 16, 02:58am until July 16, 08:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory July 16, 02:58am until July 16, 08:00pm

    NOW until 8:00pm Wed

    Heat Advisory

  • Overnight

    Low: 68 °F

    Patchy Fog

  • Wednesday

    Wednesday: Patchy fog before 8am. Otherwise, sunny and hot, with a high near 93. Heat index values as high as 97. Calm wind becoming southwest around 5 mph.

    High: 93 °F

    Patchy Fog
    then Sunny

  • Wednesday Night

    Wednesday Night: Increasing clouds, with a low around 72. South wind around 5 mph becoming calm.

    Low: 72 °F

    Increasing
    Clouds

  • Thursday

    Thursday: Scattered showers and thunderstorms after 9am. Partly sunny and hot, with a high near 90. Heat index values as high as 98. Southwest wind around 5 mph. Chance of precipitation is 40%.

    High: 90 °F

    Scattered
    T-storms

  • Thursday Night

    Thursday Night: A 30 percent chance of showers before 9pm. Partly cloudy, with a low around 71. Southwest wind around 5 mph.

    Low: 71 °F

    Chance
    Showers then
    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 82.

    High: 82 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 58.

    Low: 58 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 84.

    High: 84 °F

    Mostly Sunny

Detailed Forecast

Overnight
Patchy fog. Otherwise, mostly clear, with a low around 68. Calm wind.
Wednesday
Patchy fog before 8am. Otherwise, sunny and hot, with a high near 93. Heat index values as high as 97. Calm wind becoming southwest around 5 mph.
Wednesday Night
Increasing clouds, with a low around 72. South wind around 5 mph becoming calm.
Thursday
Scattered showers and thunderstorms after 9am. Partly sunny and hot, with a high near 90. Heat index values as high as 98. Southwest wind around 5 mph. Chance of precipitation is 40%.
Thursday Night
A 30 percent chance of showers before 9pm. Partly cloudy, with a low around 71. Southwest wind around 5 mph.
Friday
Mostly sunny, with a high near 82.
Friday Night
Mostly clear, with a low around 58.
Saturday
Mostly sunny, with a high near 84.
Saturday Night
A 30 percent chance of showers after 2am. Partly cloudy, with a low around 64.
Sunday
A 50 percent chance of showers. Partly sunny, with a high near 82.
Sunday Night
Partly cloudy, with a low around 62.
Monday
Mostly sunny, with a high near 81.
Monday Night
Partly cloudy, with a low around 60.
Tuesday
Mostly sunny, with a high near 82.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles WSW Merrimack NH
 42.86°N 71.52°W (Elev. 207 ft)
Last Update:
1:36 am EDT Jul 16, 2025
Forecast Valid:
2am EDT Jul 16, 2025-6pm EDT Jul 22, 2025
 
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