NWS Forecast for Plaistow NH

National Weather Service Forecast for: Plaistow NH
Issued by: National Weather Service Gray/Portland, ME

Updated: 6:48 am EDT Jun 30, 2026

Today Hot	Tonight Chance Showers	Wednesday Hot	Wednesday Night Mostly Clear	Thursday Hot	Thursday Night Clear	Friday Hot	Friday Night Mostly Clear	Independence Day Mostly Sunny then Chance T-storms
Hi 90 °F	Lo 68 °F	Hi 98 °F	Lo 76 °F	Hi 100 °F	Lo 77 °F	Hi 99 °F	Lo 74 °F	Hi 95 °F

Extreme Heat Watch

Today	Mostly sunny and hot, with a high near 90. Calm wind becoming south around 5 mph in the afternoon.
Tonight	A chance of showers and thunderstorms. Partly cloudy, with a low around 68. Southwest wind around 5 mph. Chance of precipitation is 40%.
Wednesday	Mostly sunny and hot, with a high near 98. Heat index values as high as 109. West wind around 5 mph.
Wednesday Night	Mostly clear, with a low around 76. Southwest wind around 5 mph.
Thursday	Sunny and hot, with a high near 100. West wind around 5 mph.
Thursday Night	Clear, with a low around 77.
Friday	Sunny and hot, with a high near 99.
Friday Night	Mostly clear, with a low around 74.
Independence Day	A 40 percent chance of showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 95.
Saturday Night	A chance of showers and thunderstorms before 8pm, then a chance of showers between 8pm and 10pm. Partly cloudy, with a low around 69. Chance of precipitation is 30%.
Sunday	Mostly sunny and hot, with a high near 91.
Sunday Night	Partly cloudy, with a low around 66.
Monday	Mostly sunny, with a high near 85.

Forecast from NOAA-NWS for Plaistow NH.