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.

Mostly Cloudy

85°F

29°C

Humidity 70%
Wind Speed S 5 mph
Barometer 29.99 in
Dewpoint 74°F (23°C)
Visibility 10.00 mi
Heat Index93°F (34°C)
Last update 14 Jul 5:56 pm EDT
Extended Forecast for

Windham NH

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

  • Tonight

    Tonight: Showers likely and possibly a thunderstorm before 7pm, then scattered showers and thunderstorms between 7pm and 11pm, then isolated showers after 11pm. Mostly cloudy, with a low around 70. South wind around 5 mph becoming calm in the evening. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 70 °F

    Showers
    Likely then
    Isolated
    Showers

  • Tuesday

    Tuesday: A 20 percent chance of showers after 2pm. Mostly cloudy, then gradually becoming sunny, with a high near 89. Heat index values as high as 95. Calm wind.

    High: 89 °F

    Mostly Sunny
    then Slight
    Chance
    Showers

  • Tuesday Night

    Tuesday Night: Patchy fog after 1am. Otherwise, mostly clear, with a low around 69. Calm wind.

    Low: 69 °F

    Mostly Clear
    then Patchy
    Fog

  • Wednesday

    Wednesday: Patchy fog before 9am. Otherwise, sunny and hot, with a high near 93. Heat index values as high as 97. Calm wind becoming southwest around 5 mph in the afternoon.

    High: 93 °F

    Patchy Fog
    then Mostly
    Sunny

  • Wednesday Night

    Wednesday Night: Patchy fog after 2am. Otherwise, mostly cloudy, with a low around 72. Southwest wind around 5 mph.

    Low: 72 °F

    Mostly Cloudy
    then Patchy
    Fog

  • Thursday

    Thursday: A chance of showers and thunderstorms before 8am, then a chance of showers between 8am and 2pm, then a chance of showers and thunderstorms after 2pm. Patchy fog before 7am. Otherwise, partly sunny and hot, with a high near 90. Chance of precipitation is 40%.

    High: 90 °F

    Chance
    Showers and
    Patchy Fog
    then Chance
    T-storms

  • Thursday Night

    Thursday Night: Scattered thunderstorms before 8pm. Patchy fog before 4am, then patchy fog after 5am. Otherwise, partly cloudy, with a low around 72. Chance of precipitation is 30%.

    Low: 72 °F

    Scattered
    T-storms then
    Patchy Fog

  • Friday

    Friday: A 30 percent chance of showers and thunderstorms after 2pm. Patchy fog before 7am. Otherwise, mostly sunny, with a high near 88.

    High: 88 °F

    Patchy Fog
    then Chance
    T-storms

  • Friday Night

    Friday Night: A 30 percent chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 65.

    Low: 65 °F

    Chance
    T-storms then
    Partly Cloudy

Detailed Forecast

Tonight
Showers likely and possibly a thunderstorm before 7pm, then scattered showers and thunderstorms between 7pm and 11pm, then isolated showers after 11pm. Mostly cloudy, with a low around 70. South wind around 5 mph becoming calm in the evening. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tuesday
A 20 percent chance of showers after 2pm. Mostly cloudy, then gradually becoming sunny, with a high near 89. Heat index values as high as 95. Calm wind.
Tuesday Night
Patchy fog after 1am. Otherwise, mostly clear, with a low around 69. Calm wind.
Wednesday
Patchy fog before 9am. Otherwise, sunny and hot, with a high near 93. Heat index values as high as 97. Calm wind becoming southwest around 5 mph in the afternoon.
Wednesday Night
Patchy fog after 2am. Otherwise, mostly cloudy, with a low around 72. Southwest wind around 5 mph.
Thursday
A chance of showers and thunderstorms before 8am, then a chance of showers between 8am and 2pm, then a chance of showers and thunderstorms after 2pm. Patchy fog before 7am. Otherwise, partly sunny and hot, with a high near 90. Chance of precipitation is 40%.
Thursday Night
Scattered thunderstorms before 8pm. Patchy fog before 4am, then patchy fog after 5am. Otherwise, partly cloudy, with a low around 72. Chance of precipitation is 30%.
Friday
A 30 percent chance of showers and thunderstorms after 2pm. Patchy fog before 7am. Otherwise, mostly sunny, with a high near 88.
Friday Night
A 30 percent chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 65.
Saturday
Mostly sunny, with a high near 82.
Saturday Night
Partly cloudy, with a low around 64.
Sunday
A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 81.
Sunday Night
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 64.
Monday
Mostly sunny, with a high near 81.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Windham NH
 42.79°N 71.3°W (Elev. 194 ft)
Last Update:
1:50 pm EDT Jul 14, 2025
Forecast Valid:
6pm EDT Jul 14, 2025-6pm EDT Jul 21, 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