National Weather Service Forecast for: Hanover NH
Issued by: National Weather Service Gray/Portland, ME
Updated: 6:48 am EDT Jun 30, 2026
 
Today

Today: Increasing clouds and hot, with a high near 90. Calm wind.
Hot

 Tonight

Tonight: Showers and thunderstorms likely before 2am, then a slight chance of showers. Mostly cloudy, with a low around 67. Calm wind. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Showers
Likely then
Slight Chance
T-storms
 Wednesday

Wednesday: A slight chance of showers and thunderstorms between noon and 2pm. Mostly sunny and hot, with a high near 95. Heat index values as high as 107. Calm wind becoming west around 5 mph in the afternoon. Chance of precipitation is 20%.
Mostly Sunny
then Slight
Chance
T-storms
 Wednesday
Night
Wednesday Night: Partly cloudy, with a low around 73. Calm wind.
Partly Cloudy

 Thursday

Thursday: Sunny and hot, with a high near 98. Calm wind becoming west around 5 mph in the afternoon.
Hot

 Thursday
Night
Thursday Night: Mostly clear, with a low around 73.
Mostly Clear

 Friday

Friday: Sunny and hot, with a high near 96.
Hot

 Friday
Night
Friday Night: Mostly clear, with a low around 68.
Mostly Clear

 Independence
Day
Independence Day: A chance of showers between noon and 2pm, then a chance of showers and thunderstorms after 2pm. Partly sunny and hot, with a high near 91. Chance of precipitation is 40%.
Mostly Sunny
then Chance
T-storms
Hi 90 °F Lo 67 °F Hi 95 °F Lo 73 °F Hi 98 °F Lo 73 °F Hi 96 °F Lo 68 °F Hi 91 °F

Extreme Heat Watch
 

Today
 
 Increasing clouds and hot, with a high near 90. Calm wind.
Tonight
 
 Showers and thunderstorms likely before 2am, then a slight chance of showers. Mostly cloudy, with a low around 67. Calm wind. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Wednesday
 
 A slight chance of showers and thunderstorms between noon and 2pm. Mostly sunny and hot, with a high near 95. Heat index values as high as 107. Calm wind becoming west around 5 mph in the afternoon. Chance of precipitation is 20%.
Wednesday Night
 
 Partly cloudy, with a low around 73. Calm wind.
Thursday
 
 Sunny and hot, with a high near 98. Calm wind becoming west around 5 mph in the afternoon.
Thursday Night
 
 Mostly clear, with a low around 73.
Friday
 
 Sunny and hot, with a high near 96.
Friday Night
 
 Mostly clear, with a low around 68.
Independence Day
 
 A chance of showers between noon and 2pm, then a chance of showers and thunderstorms after 2pm. Partly sunny and hot, with a high near 91. Chance of precipitation is 40%.
Saturday Night
 
 A chance of showers and thunderstorms before 8pm, then a chance of showers between 8pm and 9pm. Partly cloudy, with a low around 65. Chance of precipitation is 30%.
Sunday
 
 Mostly sunny, with a high near 89.
Sunday Night
 
 Partly cloudy, with a low around 63.
Monday
 
 A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 87.

 

Forecast from NOAA-NWS for Hanover NH.