National Weather Service Forecast for: Waterbury CT
Issued by: National Weather Service New York, NY
Updated: 11:53 pm EDT Jun 21, 2026
 
Today

Today: A chance of showers, then showers and possibly a thunderstorm after 2pm. High near 75. Calm wind becoming southeast 5 to 8 mph in the afternoon. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Slight Chance
Showers then
Showers
 Tonight

Tonight: Showers and possibly a thunderstorm. Low around 59. South wind 6 to 9 mph, with gusts as high as 21 mph. Chance of precipitation is 100%. New rainfall amounts between three quarters and one inch possible.
Showers

 Tuesday

Tuesday: Showers likely, mainly before 8am. Partly sunny, with a high near 78. North wind 3 to 8 mph. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.
Showers
Likely
 Tuesday
Night
Tuesday Night: Mostly clear, with a low around 57. Northwest wind around 5 mph.
Mostly Clear

 Wednesday

Wednesday: Sunny, with a high near 81. Northwest wind 3 to 8 mph.
Sunny

 Wednesday
Night
Wednesday Night: Mostly clear, with a low around 57.
Mostly Clear

 Thursday

Thursday: Sunny, with a high near 84.
Sunny

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

Friday: Showers likely, with thunderstorms also possible after 2pm. Partly sunny, with a high near 81. Chance of precipitation is 60%.
Showers
Likely
Hi 75 °F Lo 59 °F Hi 78 °F Lo 57 °F Hi 81 °F Lo 57 °F Hi 84 °F Lo 62 °F Hi 81 °F

Hazardous Weather Outlook
 

Today
 
 A chance of showers, then showers and possibly a thunderstorm after 2pm. High near 75. Calm wind becoming southeast 5 to 8 mph in the afternoon. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Tonight
 
 Showers and possibly a thunderstorm. Low around 59. South wind 6 to 9 mph, with gusts as high as 21 mph. Chance of precipitation is 100%. New rainfall amounts between three quarters and one inch possible.
Tuesday
 
 Showers likely, mainly before 8am. Partly sunny, with a high near 78. North wind 3 to 8 mph. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.
Tuesday Night
 
 Mostly clear, with a low around 57. Northwest wind around 5 mph.
Wednesday
 
 Sunny, with a high near 81. Northwest wind 3 to 8 mph.
Wednesday Night
 
 Mostly clear, with a low around 57.
Thursday
 
 Sunny, with a high near 84.
Thursday Night
 
 A 50 percent chance of showers after 2am. Partly cloudy, with a low around 62.
Friday
 
 Showers likely, with thunderstorms also possible after 2pm. Partly sunny, with a high near 81. Chance of precipitation is 60%.
Friday Night
 
 A chance of showers and thunderstorms before 8pm, then a chance of showers between 8pm and 2am. Mostly cloudy, with a low around 61. Chance of precipitation is 30%.
Saturday
 
 A 30 percent chance of showers. Mostly sunny, with a high near 85.
Saturday Night
 
 Partly cloudy, with a low around 60.
Sunday
 
 Sunny, with a high near 86.

 

Forecast from NOAA-NWS for Waterbury CT.