National Weather Service Forecast for: Harmony RI
Issued by: National Weather Service Norton, MA
Updated: 12:46 am EDT Jun 30, 2026
 
Overnight

Overnight: Mostly clear, with a low around 62. Calm wind.
Mostly Clear

Tuesday

Tuesday: Mostly sunny, with a high near 85. Calm wind becoming southwest 5 to 7 mph in the morning.
Mostly Sunny

Tuesday
Night
Tuesday Night: A chance of showers and thunderstorms, mainly between 9pm and 2am.  Mostly cloudy, with a low around 67. Southwest wind around 7 mph.  Chance of precipitation is 30%.
Chance
Showers

Wednesday

Wednesday: Mostly sunny and hot, with a high near 93. Heat index values as high as 99. West wind around 9 mph, with gusts as high as 22 mph.
Hot

Wednesday
Night
Wednesday Night: A chance of showers and thunderstorms, mainly before midnight.  Partly cloudy, with a low around 73. West wind around 6 mph.  Chance of precipitation is 30%.
Chance
Showers then
Slight Chance
T-storms
Thursday

Thursday: Sunny and hot, with a high near 97. West wind 6 to 9 mph.
Hot

Thursday
Night
Thursday Night: Clear, with a low around 75. West wind 5 to 7 mph.
Clear

Friday

Friday: Sunny and hot, with a high near 97. West wind 7 to 10 mph, with gusts as high as 21 mph.
Hot

Friday
Night
Friday Night: Mostly clear, with a low around 72. West wind around 7 mph.
Mostly Clear

Lo 62 °F Hi 85 °F Lo 67 °F Hi 93 °F Lo 73 °F Hi 97 °F Lo 75 °F Hi 97 °F Lo 72 °F

Extreme Heat Watch
 

Overnight
 
Mostly clear, with a low around 62. Calm wind.
Tuesday
 
Mostly sunny, with a high near 85. Calm wind becoming southwest 5 to 7 mph in the morning.
Tuesday Night
 
A chance of showers and thunderstorms, mainly between 9pm and 2am. Mostly cloudy, with a low around 67. Southwest wind around 7 mph. Chance of precipitation is 30%.
Wednesday
 
Mostly sunny and hot, with a high near 93. Heat index values as high as 99. West wind around 9 mph, with gusts as high as 22 mph.
Wednesday Night
 
A chance of showers and thunderstorms, mainly before midnight. Partly cloudy, with a low around 73. West wind around 6 mph. Chance of precipitation is 30%.
Thursday
 
Sunny and hot, with a high near 97. West wind 6 to 9 mph.
Thursday Night
 
Clear, with a low around 75. West wind 5 to 7 mph.
Friday
 
Sunny and hot, with a high near 97. West wind 7 to 10 mph, with gusts as high as 21 mph.
Friday Night
 
Mostly clear, with a low around 72. West wind around 7 mph.
Independence Day
 
A chance of showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 93. West wind 6 to 8 mph. Chance of precipitation is 30%.
Saturday Night
 
A chance of showers and thunderstorms. Partly cloudy, with a low around 69. West wind around 5 mph. Chance of precipitation is 30%.
Sunday
 
Mostly sunny, with a high near 89. Northwest wind around 5 mph.
Sunday Night
 
A chance of showers. Partly cloudy, with a low around 66. South wind 3 to 5 mph. Chance of precipitation is 30%.
Monday
 
A chance of showers. Partly sunny, with a high near 82. Southeast wind around 6 mph. Chance of precipitation is 30%.

 

Forecast from NOAA-NWS for Harmony RI.