NWS Forecast for Derby CT

National Weather Service Forecast for: Derby CT
Issued by: National Weather Service New York, NY

Updated: 2:24 am EDT Jun 30, 2026

Today Mostly Sunny	Tonight Slight Chance T-storms	Wednesday Mostly Sunny then Slight Chance T-storms	Wednesday Night Partly Cloudy	Thursday Hot	Thursday Night Clear	Friday Sunny then Chance Showers	Friday Night Chance Showers then Mostly Clear	Independence Day Sunny then Chance T-storms
Hi 89 °F	Lo 68 °F	Hi 96 °F	Lo 73 °F	Hi 101 °F	Lo 76 °F	Hi 99 °F	Lo 73 °F	Hi 97 °F

Hazardous Weather Outlook
Extreme Heat Watch
Air Quality Alert
Extreme Heat Warning

Today	Mostly sunny, with a high near 89. Light south wind increasing to 5 to 10 mph in the morning.
Tonight	A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 68. South wind 6 to 10 mph, with gusts as high as 21 mph.
Wednesday	A 20 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 96. Heat index values as high as 105. Southwest wind 8 to 11 mph.
Wednesday Night	Partly cloudy, with a low around 73. Southwest wind 3 to 7 mph.
Thursday	Sunny and hot, with a high near 101. Light west wind becoming southwest 5 to 9 mph in the morning.
Thursday Night	Clear, with a low around 76.
Friday	A 30 percent chance of showers after 2pm. Increasing clouds, with a high near 99.
Friday Night	A 30 percent chance of showers before 8pm. Partly cloudy, with a low around 73.
Independence Day	A 40 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 97.
Saturday Night	A chance of showers and thunderstorms before 8pm, then a chance of showers between 8pm and 2am. Partly cloudy, with a low around 70. Chance of precipitation is 30%.
Sunday	A 30 percent chance of showers. Mostly sunny, with a high near 94.
Sunday Night	A 30 percent chance of showers. Mostly cloudy, with a low around 68.
Monday	A 30 percent chance of showers. Partly sunny, with a high near 88.

Forecast from NOAA-NWS for Derby CT.