National Weather Service Forecast for: Waterbury CT
Issued by: National Weather Service New York, NY
Updated: 2:27 am EDT Aug 20, 2026
 
Today

Today: Showers likely, mainly after 5pm. Increasing clouds, with a high near 81. Calm wind becoming northwest around 6 mph in the afternoon. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Sunny then
Showers
Likely
 Tonight

Tonight: Showers likely, mainly before 11pm. Mostly cloudy, with a low around 59. North wind 3 to 5 mph. Chance of precipitation is 60%. New precipitation amounts between a half and three quarters of an inch possible.
Showers
Likely

 Friday

Friday: Partly sunny, with a high near 78. Northeast wind around 7 mph.
Partly Sunny

 Friday
Night
Friday Night: A 50 percent chance of showers after 2am. Mostly cloudy, with a low around 62. Calm wind.
Mostly Cloudy
then Chance
Showers
 Saturday

Saturday: Showers, mainly after 8am. High near 75. Northeast wind around 7 mph. Chance of precipitation is 80%. New precipitation amounts between a half and three quarters of an inch possible.
Showers

 Saturday
Night
Saturday Night: Showers. Low around 63. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Showers

 Sunday

Sunday: A chance of showers, then showers likely and possibly a thunderstorm after 2pm. Mostly cloudy, with a high near 80. Chance of precipitation is 60%.
Chance
Showers then
Showers
Likely
 Sunday
Night
Sunday Night: Showers likely and possibly a thunderstorm before 8pm. Partly cloudy, with a low around 59. Chance of precipitation is 60%.
Showers
Likely then
Partly Cloudy
 Monday

Monday: Sunny, with a high near 79.
Sunny
Hi 81 °F Lo 59 °F Hi 78 °F Lo 62 °F Hi 75 °F Lo 63 °F Hi 80 °F Lo 59 °F Hi 79 °F

 

Today
 
 Showers likely, mainly after 5pm. Increasing clouds, with a high near 81. Calm wind becoming northwest around 6 mph in the afternoon. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Tonight
 
 Showers likely, mainly before 11pm. Mostly cloudy, with a low around 59. North wind 3 to 5 mph. Chance of precipitation is 60%. New precipitation amounts between a half and three quarters of an inch possible.
Friday
 
 Partly sunny, with a high near 78. Northeast wind around 7 mph.
Friday Night
 
 A 50 percent chance of showers after 2am. Mostly cloudy, with a low around 62. Calm wind.
Saturday
 
 Showers, mainly after 8am. High near 75. Northeast wind around 7 mph. Chance of precipitation is 80%. New precipitation amounts between a half and three quarters of an inch possible.
Saturday Night
 
 Showers. Low around 63. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Sunday
 
 A chance of showers, then showers likely and possibly a thunderstorm after 2pm. Mostly cloudy, with a high near 80. Chance of precipitation is 60%.
Sunday Night
 
 Showers likely and possibly a thunderstorm before 8pm. Partly cloudy, with a low around 59. Chance of precipitation is 60%.
Monday
 
 Sunny, with a high near 79.
Monday Night
 
 Mostly clear, with a low around 55.
Tuesday
 
 Sunny, with a high near 78.
Tuesday Night
 
 Mostly clear, with a low around 57.
Wednesday
 
 Sunny, with a high near 80.

 

Forecast from NOAA-NWS for Waterbury CT.