National Weather Service Forecast for: Derby CT
Issued by: National Weather Service New York, NY
Updated: 5:58 am EDT Jul 13, 2026
 
Today

Today: Sunny, with a high near 86. Calm wind becoming south 5 to 9 mph in the morning.
Sunny
Tonight

Tonight: Mostly clear, with a low around 67. Southwest wind around 7 mph.
Mostly Clear
Tuesday

Tuesday: Sunny, with a high near 93. Heat index values as high as 98. Southwest wind 7 to 11 mph.
Sunny
Tuesday
Night
Tuesday Night: Mostly clear, with a low around 76. West wind 8 to 10 mph.
Mostly Clear
Wednesday

Wednesday: Sunny, with a high near 96. Northwest wind 8 to 11 mph.
Sunny
Wednesday
Night
Wednesday Night: Partly cloudy, with a low around 68.
Partly Cloudy
Thursday

Thursday: Mostly sunny, with a high near 91.
Mostly Sunny
Thursday
Night
Thursday Night: Partly cloudy, with a low around 66.
Partly Cloudy
Friday

Friday: Sunny, with a high near 88.
Sunny
Hi 86 °F Lo 67 °F Hi 93 °F Lo 76 °F Hi 96 °F Lo 68 °F Hi 91 °F Lo 66 °F Hi 88 °F

Heat Advisory
 

Today
 
Sunny, with a high near 86. Calm wind becoming south 5 to 9 mph in the morning.
Tonight
 
Mostly clear, with a low around 67. Southwest wind around 7 mph.
Tuesday
 
Sunny, with a high near 93. Heat index values as high as 98. Southwest wind 7 to 11 mph.
Tuesday Night
 
Mostly clear, with a low around 76. West wind 8 to 10 mph.
Wednesday
 
Sunny, with a high near 96. Northwest wind 8 to 11 mph.
Wednesday Night
 
Partly cloudy, with a low around 68.
Thursday
 
Mostly sunny, with a high near 91.
Thursday Night
 
Partly cloudy, with a low around 66.
Friday
 
Sunny, with a high near 88.
Friday Night
 
Partly cloudy, with a low around 65.
Saturday
 
A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 87.
Saturday Night
 
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 66.
Sunday
 
A 40 percent chance of showers. Partly sunny, with a high near 89.

 

Forecast from NOAA-NWS for Derby CT.