National Weather Service Forecast for: Londonderry NH
Issued by: National Weather Service Gray/Portland, ME
Updated: 7:05 pm EDT Sep 12, 2026
 
Tonight

Tonight: Increasing clouds, with a low around 59. Southeast wind around 5 mph becoming calm.
Increasing
Clouds

 Sunday

Sunday: Showers and possibly a thunderstorm before 3pm, then a chance of showers and thunderstorms, mainly between 3pm and 5pm. Patchy fog after 10am. High near 70. South wind around 5 mph becoming calm. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.
Showers and
Patchy Fog

 Sunday
Night
Sunday Night: A 30 percent chance of showers, mainly after 5am. Patchy fog between 2am and 3am. Otherwise, increasing clouds, with a low around 59. Calm wind becoming west around 5 mph after midnight. New precipitation amounts of less than a tenth of an inch possible.
Mostly Cloudy
then Chance
Showers and
Patchy Fog
 Monday

Monday: Cloudy through mid morning, then gradual clearing, with a high near 71. Northwest wind 5 to 10 mph, with gusts as high as 20 mph.
Becoming
Sunny

 Monday
Night
Monday Night: Clear, with a low around 46. Northwest wind around 5 mph becoming calm in the evening.
Clear

 Tuesday

Tuesday: Sunny, with a high near 70.
Sunny

 Tuesday
Night
Tuesday Night: Mostly clear, with a low around 50.
Mostly Clear

 Wednesday

Wednesday: Mostly sunny, with a high near 77.
Mostly Sunny

 Wednesday
Night
Wednesday Night: Partly cloudy, with a low around 57.
Partly Cloudy
Lo 59 °F Hi 70 °F Lo 59 °F Hi 71 °F Lo 46 °F Hi 70 °F Lo 50 °F Hi 77 °F Lo 57 °F

 

Tonight
 
 Increasing clouds, with a low around 59. Southeast wind around 5 mph becoming calm.
Sunday
 
 Showers and possibly a thunderstorm before 3pm, then a chance of showers and thunderstorms, mainly between 3pm and 5pm. Patchy fog after 10am. High near 70. South wind around 5 mph becoming calm. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.
Sunday Night
 
 A 30 percent chance of showers, mainly after 5am. Patchy fog between 2am and 3am. Otherwise, increasing clouds, with a low around 59. Calm wind becoming west around 5 mph after midnight. New precipitation amounts of less than a tenth of an inch possible.
Monday
 
 Cloudy through mid morning, then gradual clearing, with a high near 71. Northwest wind 5 to 10 mph, with gusts as high as 20 mph.
Monday Night
 
 Clear, with a low around 46. Northwest wind around 5 mph becoming calm in the evening.
Tuesday
 
 Sunny, with a high near 70.
Tuesday Night
 
 Mostly clear, with a low around 50.
Wednesday
 
 Mostly sunny, with a high near 77.
Wednesday Night
 
 Partly cloudy, with a low around 57.
Thursday
 
 Mostly sunny, with a high near 78.
Thursday Night
 
 A 30 percent chance of showers. Mostly cloudy, with a low around 59.
Friday
 
 Partly sunny, with a high near 75.
Friday Night
 
 A 30 percent chance of showers. Mostly cloudy, with a low around 53.
Saturday
 
 A 30 percent chance of showers. Mostly sunny, with a high near 70.

 

Forecast from NOAA-NWS for Londonderry NH.