National Weather Service Forecast for: Waterbury CT
Issued by: National Weather Service New York, NY
Updated: 8:01 am EDT Jul 9, 2025
 
Today

Today: A 20 percent chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 88. Heat index values as high as 96. Calm wind becoming west around 6 mph in the afternoon.
Partly Sunny
then Slight
Chance
T-storms
 Tonight

Tonight: A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 69. Calm wind.
Chance
T-storms

 Thursday

Thursday: Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 80. Calm wind becoming southeast around 6 mph in the afternoon. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Showers
Likely

 Thursday
Night
Thursday Night: A 40 percent chance of showers and thunderstorms, mainly before 2am. Mostly cloudy, with a low around 67. Calm wind.
Chance
T-storms then
Chance
Showers
 Friday

Friday: A slight chance of showers, then a chance of showers and thunderstorms after 2pm. Mostly cloudy, with a high near 83. Calm wind becoming southeast around 5 mph in the afternoon. Chance of precipitation is 30%.
Slight Chance
Showers then
Chance
T-storms
 Friday
Night
Friday Night: A 30 percent chance of showers and thunderstorms before 8pm. Mostly cloudy, with a low around 67.
Chance
T-storms then
Mostly Cloudy
 Saturday

Saturday: Partly sunny, with a high near 86.
Partly Sunny

 Saturday
Night
Saturday Night: Partly cloudy, with a low around 67.
Partly Cloudy

 Sunday

Sunday: A 30 percent chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 86.
Partly Sunny
then Chance
T-storms
Hi 88 °F Lo 69 °F Hi 80 °F Lo 67 °F Hi 83 °F Lo 67 °F Hi 86 °F Lo 67 °F Hi 86 °F

 

Today
 
 A 20 percent chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 88. Heat index values as high as 96. Calm wind becoming west around 6 mph in the afternoon.
Tonight
 
 A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 69. Calm wind.
Thursday
 
 Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 80. Calm wind becoming southeast around 6 mph in the afternoon. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday Night
 
 A 40 percent chance of showers and thunderstorms, mainly before 2am. Mostly cloudy, with a low around 67. Calm wind.
Friday
 
 A slight chance of showers, then a chance of showers and thunderstorms after 2pm. Mostly cloudy, with a high near 83. Calm wind becoming southeast around 5 mph in the afternoon. Chance of precipitation is 30%.
Friday Night
 
 A 30 percent chance of showers and thunderstorms before 8pm. Mostly cloudy, with a low around 67.
Saturday
 
 Partly sunny, with a high near 86.
Saturday Night
 
 Partly cloudy, with a low around 67.
Sunday
 
 A 30 percent chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 86.
Sunday Night
 
 A chance of showers and thunderstorms. Mostly cloudy, with a low around 68. Chance of precipitation is 40%.
Monday
 
 A 40 percent chance of showers. Partly sunny, with a high near 87.
Monday Night
 
 Mostly cloudy, with a low around 68.
Tuesday
 
 Mostly sunny, with a high near 90.

 

Forecast from NOAA-NWS for Waterbury CT.