National Weather Service Forecast for: Swanzey NH
Issued by: National Weather Service Gray/Portland, ME
Updated: 2:26 am EDT Jun 30, 2026
 
Today

Today: A slight chance of showers and thunderstorms between 3pm and 5pm. Mostly sunny and hot, with a high near 90. Calm wind becoming southwest around 5 mph. Chance of precipitation is 20%.
Mostly Sunny
then Slight
Chance
T-storms
 Tonight

Tonight: A 40 percent chance of showers and thunderstorms, mainly before midnight. Mostly cloudy, with a low around 67. Calm wind becoming south around 5 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Chance
Showers then
Slight Chance
T-storms
 Wednesday

Wednesday: A slight chance of showers and thunderstorms between 2pm and 3pm. Mostly sunny and hot, with a high near 96. Heat index values as high as 109. Calm wind becoming southwest 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 74. Calm wind.
Partly Cloudy

 Thursday

Thursday: Sunny and hot, with a high near 100. Calm wind becoming west around 5 mph in the afternoon.
Hot

 Thursday
Night
Thursday Night: Mostly clear, with a low around 75.
Mostly Clear

 Friday

Friday: Sunny and hot, with a high near 98.
Hot

 Friday
Night
Friday Night: Mostly clear, with a low around 70.
Mostly Clear

 Independence
Day
Independence Day: A 30 percent chance of showers and thunderstorms after 4pm. Mostly sunny and hot, with a high near 94.
Mostly Sunny
then Chance
T-storms
Hi 90 °F Lo 67 °F Hi 96 °F Lo 74 °F Hi 100 °F Lo 75 °F Hi 98 °F Lo 70 °F Hi 94 °F

Extreme Heat Watch
 

Today
 
 A slight chance of showers and thunderstorms between 3pm and 5pm. Mostly sunny and hot, with a high near 90. Calm wind becoming southwest around 5 mph. Chance of precipitation is 20%.
Tonight
 
 A 40 percent chance of showers and thunderstorms, mainly before midnight. Mostly cloudy, with a low around 67. Calm wind becoming south around 5 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday
 
 A slight chance of showers and thunderstorms between 2pm and 3pm. Mostly sunny and hot, with a high near 96. Heat index values as high as 109. Calm wind becoming southwest around 5 mph in the afternoon. Chance of precipitation is 20%.
Wednesday Night
 
 Partly cloudy, with a low around 74. Calm wind.
Thursday
 
 Sunny and hot, with a high near 100. Calm wind becoming west around 5 mph in the afternoon.
Thursday Night
 
 Mostly clear, with a low around 75.
Friday
 
 Sunny and hot, with a high near 98.
Friday Night
 
 Mostly clear, with a low around 70.
Independence Day
 
 A 30 percent chance of showers and thunderstorms after 4pm. Mostly sunny and hot, with a high near 94.
Saturday Night
 
 A 30 percent chance of showers and thunderstorms before 7pm. Partly cloudy, with a low around 67.
Sunday
 
 Mostly sunny and hot, with a high near 91.
Sunday Night
 
 Partly cloudy, with a low around 64.
Monday
 
 A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 88.

 

Forecast from NOAA-NWS for Swanzey NH.