National Weather Service Forecast for: New Britain CT
Issued by: National Weather Service Norton, MA
Updated: 2:14 am EDT Jun 30, 2026
 
Overnight

Overnight: Mostly clear, with a low around 64. Calm wind.
Mostly Clear

 Tuesday

Tuesday: Mostly sunny, with a high near 89. Light south wind increasing to 5 to 10 mph in the morning.
Mostly Sunny

 Tuesday
Night
Tuesday Night: A chance of showers and thunderstorms, mainly before 2am. Partly cloudy, with a low around 69. South wind around 8 mph. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Chance
T-storms then
Chance
Showers
 Wednesday

Wednesday: A slight chance of showers and thunderstorms after 3pm. Mostly sunny and hot, with a high near 95. Heat index values as high as 102. Southwest wind 7 to 10 mph, with gusts as high as 21 mph. Chance of precipitation is 20%.
Mostly Sunny
then Slight
Chance
T-storms
 Wednesday
Night
Wednesday Night: A chance of showers and thunderstorms, mainly before 1am. Mostly cloudy, with a low around 74. South wind 5 to 8 mph becoming calm in the evening. Chance of precipitation is 30%.
Chance
Showers

 Thursday

Thursday: Sunny and hot, with a high near 100. Light and variable wind becoming west 5 to 10 mph in the morning.
Hot

 Thursday
Night
Thursday Night: Clear, with a low around 75. Southwest wind 5 to 8 mph becoming calm in the evening.
Clear

 Friday

Friday: Sunny and hot, with a high near 100. Light west wind increasing to 5 to 10 mph in the morning. Winds could gust as high as 20 mph.
Hot

 Friday
Night
Friday Night: Mostly clear, with a low around 73. Northwest wind around 6 mph becoming calm in the evening.
Mostly Clear
Lo 64 °F Hi 89 °F Lo 69 °F Hi 95 °F Lo 74 °F Hi 100 °F Lo 75 °F Hi 100 °F Lo 73 °F

Air Quality Alert
Extreme Heat Warning
 

Overnight
 
 Mostly clear, with a low around 64. Calm wind.
Tuesday
 
 Mostly sunny, with a high near 89. Light south wind increasing to 5 to 10 mph in the morning.
Tuesday Night
 
 A chance of showers and thunderstorms, mainly before 2am. Partly cloudy, with a low around 69. South wind around 8 mph. Chance of precipitation is 50%. 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 after 3pm. Mostly sunny and hot, with a high near 95. Heat index values as high as 102. Southwest wind 7 to 10 mph, with gusts as high as 21 mph. Chance of precipitation is 20%.
Wednesday Night
 
 A chance of showers and thunderstorms, mainly before 1am. Mostly cloudy, with a low around 74. South wind 5 to 8 mph becoming calm in the evening. Chance of precipitation is 30%.
Thursday
 
 Sunny and hot, with a high near 100. Light and variable wind becoming west 5 to 10 mph in the morning.
Thursday Night
 
 Clear, with a low around 75. Southwest wind 5 to 8 mph becoming calm in the evening.
Friday
 
 Sunny and hot, with a high near 100. Light west wind increasing to 5 to 10 mph in the morning. Winds could gust as high as 20 mph.
Friday Night
 
 Mostly clear, with a low around 73. Northwest wind around 6 mph becoming calm in the evening.
Independence Day
 
 A chance of showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 96. Calm wind becoming west 5 to 9 mph in the morning. Chance of precipitation is 30%.
Saturday Night
 
 A chance of showers and thunderstorms. Partly cloudy, with a low around 73. Light northwest wind. Chance of precipitation is 30%.
Sunday
 
 Mostly sunny and hot, with a high near 93. Calm wind becoming west around 6 mph in the afternoon.
Sunday Night
 
 A chance of showers. Partly cloudy, with a low around 71. Southwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 30%.
Monday
 
 A chance of showers and thunderstorms. Partly sunny, with a high near 87. Light and variable wind becoming east around 6 mph in the afternoon. Chance of precipitation is 30%.

 

Forecast from NOAA-NWS for New Britain CT.