National Weather Service Forecast for: New Britain CT
Issued by: National Weather Service Norton, MA
Updated: 11:57 pm EDT Jul 24, 2025
 
Overnight

Overnight: Mostly clear, with a low around 72. Southwest wind around 8 mph.
Mostly Clear

 Friday

Friday: A slight chance of showers between noon and 2pm, then a chance of showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 95. Heat index values as high as 105. Southwest wind 7 to 10 mph. Chance of precipitation is 40%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Sunny then
Chance
Showers
 Friday
Night
Friday Night: A chance of showers and thunderstorms before 8pm, then a slight chance of showers between 8pm and 9pm. Partly cloudy, with a low around 70. West wind around 6 mph becoming north after midnight. Chance of precipitation is 30%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Chance
Showers then
Mostly Clear
 Saturday

Saturday: Mostly sunny, with a high near 89. North wind 5 to 7 mph.
Mostly Sunny

 Saturday
Night
Saturday Night: Mostly cloudy, with a low around 66. South wind around 6 mph becoming calm in the evening.
Mostly Cloudy

 Sunday

Sunday: A chance of showers, with thunderstorms also possible after 5pm. Mostly cloudy, with a high near 84. Calm wind becoming south 5 to 9 mph in the morning. Chance of precipitation is 30%.
Slight Chance
Showers then
Chance
T-storms
 Sunday
Night
Sunday Night: A chance of showers and thunderstorms before 8pm, then a chance of showers between 8pm and 1am. Mostly cloudy, with a low around 69. South wind 5 to 7 mph becoming light and variable after midnight. Chance of precipitation is 40%.
Chance
T-storms then
Chance
Showers
 Monday

Monday: Mostly sunny and hot, with a high near 90. North wind 3 to 6 mph.
Hot

 Monday
Night
Monday Night: Mostly clear, with a low around 70. Southwest wind around 5 mph becoming calm in the evening.
Mostly Clear
Lo 72 °F Hi 95 °F Lo 70 °F Hi 89 °F Lo 66 °F Hi 84 °F Lo 69 °F Hi 90 °F Lo 70 °F

Heat Advisory
 

Overnight
 
 Mostly clear, with a low around 72. Southwest wind around 8 mph.
Friday
 
 A slight chance of showers between noon and 2pm, then a chance of showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 95. Heat index values as high as 105. Southwest wind 7 to 10 mph. Chance of precipitation is 40%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Friday Night
 
 A chance of showers and thunderstorms before 8pm, then a slight chance of showers between 8pm and 9pm. Partly cloudy, with a low around 70. West wind around 6 mph becoming north after midnight. Chance of precipitation is 30%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday
 
 Mostly sunny, with a high near 89. North wind 5 to 7 mph.
Saturday Night
 
 Mostly cloudy, with a low around 66. South wind around 6 mph becoming calm in the evening.
Sunday
 
 A chance of showers, with thunderstorms also possible after 5pm. Mostly cloudy, with a high near 84. Calm wind becoming south 5 to 9 mph in the morning. Chance of precipitation is 30%.
Sunday Night
 
 A chance of showers and thunderstorms before 8pm, then a chance of showers between 8pm and 1am. Mostly cloudy, with a low around 69. South wind 5 to 7 mph becoming light and variable after midnight. Chance of precipitation is 40%.
Monday
 
 Mostly sunny and hot, with a high near 90. North wind 3 to 6 mph.
Monday Night
 
 Mostly clear, with a low around 70. Southwest wind around 5 mph becoming calm in the evening.
Tuesday
 
 Mostly sunny and hot, with a high near 94. Calm wind becoming west 5 to 8 mph in the morning.
Tuesday Night
 
 Partly cloudy, with a low around 72. Northwest wind around 6 mph.
Wednesday
 
 Mostly sunny and hot, with a high near 90. Northwest wind 5 to 8 mph.
Wednesday Night
 
 Partly cloudy, with a low around 66. North wind 3 to 6 mph.
Thursday
 
 A chance of showers. Mostly sunny, with a high near 81. North wind 5 to 7 mph. Chance of precipitation is 30%.

 

Forecast from NOAA-NWS for New Britain CT.