National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

New Haven, Tweed-New Haven Airport (KHVN)

Lat: 41.26°NLon: 72.89°WElev: 13ft.

Partly Cloudy

69°F

21°C

Humidity 70%
Wind Speed Calm
Barometer 30.16 in (1021.1 mb)
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Last update 16 Aug 8:53 am EDT
Extended Forecast for

Derby CT

  • Today

    Today: Mostly sunny, with a high near 81. Light and variable wind becoming south 5 to 10 mph in the afternoon.

    High: 81 °F

    Mostly Sunny

  • Tonight

    Tonight: Showers, with thunderstorms also possible after 5am. Low around 65. South wind around 9 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 65 °F

    Showers
    Likely then
    Showers

  • Monday

    Monday: Showers and possibly a thunderstorm before 11am, then a chance of showers between 11am and 2pm, then a chance of showers and thunderstorms after 2pm. High near 82. Southeast wind 6 to 8 mph becoming north in the afternoon. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 82 °F

    Showers then
    Chance
    Showers

  • Monday Night

    Monday Night: Partly cloudy, with a low around 65. Calm wind.

    Low: 65 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 84. North wind around 6 mph.

    High: 84 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 63.

    Low: 63 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 86.

    High: 86 °F

    Sunny

  • Wednesday Night

    Wednesday Night: A 30 percent chance of showers after 2am. Partly cloudy, with a low around 65.

    Low: 65 °F

    Partly Cloudy
    then Chance
    Showers

  • Thursday

    Thursday: A 50 percent chance of showers. Partly sunny, with a high near 81.

    High: 81 °F

    Chance
    Showers

Detailed Forecast

Today
Mostly sunny, with a high near 81. Light and variable wind becoming south 5 to 10 mph in the afternoon.
Tonight
Showers, with thunderstorms also possible after 5am. Low around 65. South wind around 9 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Monday
Showers and possibly a thunderstorm before 11am, then a chance of showers between 11am and 2pm, then a chance of showers and thunderstorms after 2pm. High near 82. Southeast wind 6 to 8 mph becoming north in the afternoon. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Monday Night
Partly cloudy, with a low around 65. Calm wind.
Tuesday
Sunny, with a high near 84. North wind around 6 mph.
Tuesday Night
Mostly clear, with a low around 63.
Wednesday
Sunny, with a high near 86.
Wednesday Night
A 30 percent chance of showers after 2am. Partly cloudy, with a low around 65.
Thursday
A 50 percent chance of showers. Partly sunny, with a high near 81.
Thursday Night
Partly cloudy, with a low around 59.
Friday
Sunny, with a high near 80.
Friday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 60.
Saturday
A 40 percent chance of showers. Partly sunny, with a high near 79.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Derby CT
 41.34°N 73.09°W (Elev. 118 ft)
Last Update:
2:19 am EDT Aug 16, 2026
Forecast Valid:
9am EDT Aug 16, 2026-6pm EDT Aug 22, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation