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Hazardous Weather Conditions

Current conditions at

Nashua - Boire Field Airport (KASH)

Lat: 42.78°NLon: 71.51°WElev: 180ft.

A Few Clouds

25°C

77°F

Humidity 82%
Wind Speed Calm
Barometer 1016.4 mb (30.02 in)
Dewpoint 22°C (71°F)
Visibility 16 km
Heat Index26°C (79°F)
Last update 15 Jul 10:56 pm EDT
Extended Forecast for

Windham NH

Heat Advisory July 15, 11:00pm until July 16, 08:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory July 15, 11:00pm until July 16, 08:00pm

    NOW until 8:00pm Wed

    Heat Advisory

  • Tonight

    Low: 20 °C

    Patchy Fog

  • Wednesday

    Wednesday: Widespread haze after 9am. Sunny and hot, with a high near 34. Heat index values as high as 37. Calm wind becoming southwest 5 to 10 km/h in the afternoon.

    High: 34 °C

    Haze

  • Wednesday Night

    Wednesday Night: Isolated showers after 2am. Patchy fog after 3am. Otherwise, increasing clouds, with a low around 22. South wind 5 to 10 km/h. Chance of precipitation is 20%.

    Low: 22 °C

    Partly Cloudy
    then Isolated
    Showers and
    Patchy Fog

  • Thursday

    Thursday: Showers likely, with thunderstorms also possible after 2pm. Patchy fog before 9am. Otherwise, partly sunny and hot, with a high near 32. Heat index values as high as 37. Southwest wind around 10 km/h. Chance of precipitation is 60%.

    High: 32 °C

    Showers
    Likely and
    Patchy Fog

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms before 8pm, then a chance of showers between 8pm and 9pm. Partly cloudy, with a low around 22. Southwest wind around 10 km/h. Chance of precipitation is 30%.

    Low: 22 °C

    Chance
    T-storms then
    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 29.

    High: 29 °C

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 15.

    Low: 15 °C

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 28.

    High: 28 °C

    Mostly Sunny

Detailed Forecast

Tonight
Patchy fog after 1am. Otherwise, mostly clear, with a low around 20. Calm wind.
Wednesday
Widespread haze after 9am. Sunny and hot, with a high near 34. Heat index values as high as 37. Calm wind becoming southwest 5 to 10 km/h in the afternoon.
Wednesday Night
Isolated showers after 2am. Patchy fog after 3am. Otherwise, increasing clouds, with a low around 22. South wind 5 to 10 km/h. Chance of precipitation is 20%.
Thursday
Showers likely, with thunderstorms also possible after 2pm. Patchy fog before 9am. Otherwise, partly sunny and hot, with a high near 32. Heat index values as high as 37. Southwest wind around 10 km/h. Chance of precipitation is 60%.
Thursday Night
A chance of showers and thunderstorms before 8pm, then a chance of showers between 8pm and 9pm. Partly cloudy, with a low around 22. Southwest wind around 10 km/h. Chance of precipitation is 30%.
Friday
Mostly sunny, with a high near 29.
Friday Night
Mostly clear, with a low around 15.
Saturday
Mostly sunny, with a high near 28.
Saturday Night
Mostly cloudy, with a low around 17.
Sunday
A 30 percent chance of showers after 8am. Partly sunny, with a high near 28.
Sunday Night
A 30 percent chance of showers. Partly cloudy, with a low around 17.
Monday
Mostly sunny, with a high near 27.
Monday Night
Mostly clear, with a low around 16.
Tuesday
Mostly sunny, with a high near 27.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Windham NH
 42.79°N 71.3°W (Elev. 194 m)
Last Update:
7:24 pm EDT Jul 15, 2025
Forecast Valid:
11pm EDT Jul 15, 2025-6pm EDT Jul 22, 2025
 
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