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Hazardous Weather Conditions

Current conditions at

New Haven, Tweed-New Haven Airport (KHVN)

Lat: 41.26°NLon: 72.89°WElev: 13ft.

Fair

29°C

85°F

Humidity 72%
Wind Speed SE 11 km/h
Barometer 1017.0 mb (30.03 in)
Dewpoint 24°C (75°F)
Visibility 16 km
Heat Index34°C (93°F)
Last update 15 Jul 5:53 pm EDT
Extended Forecast for

Derby CT

Heat Advisory July 16, 11:00am until July 17, 10:00pm
Click here for hazard details and duration
Heat Advisory

  • Tonight

    Tonight: Patchy fog after midnight. Otherwise, partly cloudy, with a low around 22. South wind 5 to 8 km/h becoming calm in the evening.

    Low: 22 °C

    Mostly Clear
    then Patchy
    Fog

  • Wednesday

    Wednesday: Mostly sunny, with a high near 33. Heat index values as high as 39. Light south wind increasing to 6 to 11 km/h in the afternoon.

    High: 33 °C

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: A 50 percent chance of showers and thunderstorms. Increasing clouds, with a low around 23. South wind 5 to 10 km/h.

    Low: 23 °C

    Chance
    T-storms

  • Thursday

    Thursday: Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 32. Heat index values as high as 39. Southwest wind 10 to 16 km/h. Chance of precipitation is 60%. New rainfall amounts between 5 and 7.5 mm possible.

    High: 32 °C

    Showers
    Likely

  • Thursday Night

    Thursday Night: A chance of thunderstorms before 8pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 24. Southwest wind around 10 km/h. Chance of precipitation is 30%.

    Low: 24 °C

    Chance
    T-storms then
    Partly Cloudy

  • Friday

    Friday: Sunny, with a high near 31.

    High: 31 °C

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 18.

    Low: 18 °C

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 29.

    High: 29 °C

    Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 20.

    Low: 20 °C

    Mostly Cloudy

Detailed Forecast

Tonight
Patchy fog after midnight. Otherwise, partly cloudy, with a low around 22. South wind 5 to 8 km/h becoming calm in the evening.
Wednesday
Mostly sunny, with a high near 33. Heat index values as high as 39. Light south wind increasing to 6 to 11 km/h in the afternoon.
Wednesday Night
A 50 percent chance of showers and thunderstorms. Increasing clouds, with a low around 23. South wind 5 to 10 km/h.
Thursday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 32. Heat index values as high as 39. Southwest wind 10 to 16 km/h. Chance of precipitation is 60%. New rainfall amounts between 5 and 7.5 mm possible.
Thursday Night
A chance of thunderstorms before 8pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 24. Southwest wind around 10 km/h. Chance of precipitation is 30%.
Friday
Sunny, with a high near 31.
Friday Night
Mostly clear, with a low around 18.
Saturday
Sunny, with a high near 29.
Saturday Night
Mostly cloudy, with a low around 20.
Sunday
A 50 percent chance of showers after 8am. Partly sunny, with a high near 29.
Sunday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 20.
Monday
Mostly sunny, with a high near 29.
Monday Night
Partly cloudy, with a low around 19.
Tuesday
Mostly sunny, with a high near 28.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Derby CT
 41.31°N 73.09°W (Elev. 115 m)
Last Update:
3:16 pm EDT Jul 15, 2025
Forecast Valid:
6pm EDT Jul 15, 2025-6pm EDT Jul 22, 2025
 
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