National Weather Service Forecast for: Derby CT
Issued by: National Weather Service New York, NY
Updated: 9:50 pm EST Dec 17, 2025
 
Tonight

Tonight: Mostly clear, with a low around 24. Light northwest wind.
Mostly Clear
 Thursday

Thursday: Mostly sunny, with a high near 51. Calm wind becoming south 5 to 8 mph in the afternoon.
Mostly Sunny
 Thursday
Night
Thursday Night: Rain, mainly after 1am. Temperature rising to around 51 by 3am. South wind 6 to 11 mph increasing to 12 to 17 mph after midnight. Winds could gust as high as 32 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Chance Rain
then Rain
 Friday

Friday: Rain and possibly a thunderstorm. Temperature rising to near 55 by 10am, then falling to around 42 during the remainder of the day. Breezy, with a south wind 15 to 23 mph becoming west in the afternoon. Winds could gust as high as 39 mph. Chance of precipitation is 90%. New precipitation amounts between three quarters and one inch possible.
Rain and
Breezy
 Friday
Night
Friday Night: Partly cloudy, with a low around 26. West wind 9 to 17 mph, with gusts as high as 40 mph.
Partly Cloudy
 Saturday

Saturday: Increasing clouds, with a high near 41.
Increasing
Clouds
 Saturday
Night
Saturday Night: Mostly cloudy, with a low around 31.
Mostly Cloudy
 Sunday

Sunday: Mostly sunny, with a high near 46.
Mostly Sunny
 Sunday
Night
Sunday Night: Partly cloudy, with a low around 23.
Partly Cloudy
Lo 24 °F Hi 51 °F Lo 45 °F⇑ Hi 55 °F⇓ Lo 26 °F Hi 41 °F Lo 31 °F Hi 46 °F Lo 23 °F

Wind Advisory
Hazardous Weather Outlook
 

Tonight
 
 Mostly clear, with a low around 24. Light northwest wind.
Thursday
 
 Mostly sunny, with a high near 51. Calm wind becoming south 5 to 8 mph in the afternoon.
Thursday Night
 
 Rain, mainly after 1am. Temperature rising to around 51 by 3am. South wind 6 to 11 mph increasing to 12 to 17 mph after midnight. Winds could gust as high as 32 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Friday
 
 Rain and possibly a thunderstorm. Temperature rising to near 55 by 10am, then falling to around 42 during the remainder of the day. Breezy, with a south wind 15 to 23 mph becoming west in the afternoon. Winds could gust as high as 39 mph. Chance of precipitation is 90%. New precipitation amounts between three quarters and one inch possible.
Friday Night
 
 Partly cloudy, with a low around 26. West wind 9 to 17 mph, with gusts as high as 40 mph.
Saturday
 
 Increasing clouds, with a high near 41.
Saturday Night
 
 Mostly cloudy, with a low around 31.
Sunday
 
 Mostly sunny, with a high near 46.
Sunday Night
 
 Partly cloudy, with a low around 23.
Monday
 
 Sunny, with a high near 34.
Monday Night
 
 Partly cloudy, with a low around 22.
Tuesday
 
 A chance of rain and snow. Mostly cloudy, with a high near 41. Chance of precipitation is 30%.
Tuesday Night
 
 A 30 percent chance of rain. Mostly cloudy, with a low around 29.
Wednesday
 
 Mostly sunny, with a high near 41.

 

Forecast from NOAA-NWS for Derby CT.