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

Hazardous Weather Conditions

Current conditions at

New Haven, Tweed-New Haven Airport (KHVN)

Lat: 41.26°NLon: 72.89°WElev: 13ft.

Fog/Mist

65°F

18°C

Humidity 97%
Wind Speed Calm
Barometer 30.03 in (1016.9 mb)
Dewpoint 64°F (18°C)
Visibility 4.00 mi
Last update 29 Jun 3:53 am EDT
Extended Forecast for

Derby CT

Extreme Heat Watch July 1, 12:00pm until July 3, 09:00pm
Click here for hazard details and duration
Extreme Heat Watch

  • Today

    Today: Patchy fog before 9am. Otherwise, mostly sunny, with a high near 87. Calm wind becoming northeast around 5 mph.

    High: 87 °F

    Patchy Fog
    then Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 63. Light south wind.

    Low: 63 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 87. Light south wind increasing to 6 to 11 mph in the morning.

    High: 87 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 67. Southwest wind 6 to 8 mph.

    Low: 67 °F

    Slight Chance
    T-storms

  • Wednesday

    Wednesday: A 20 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 93. Southwest wind 9 to 11 mph.

    High: 93 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 72.

    Low: 72 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 99.

    High: 99 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 75.

    Low: 75 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 99.

    High: 99 °F

    Sunny

Detailed Forecast

Today
Patchy fog before 9am. Otherwise, mostly sunny, with a high near 87. Calm wind becoming northeast around 5 mph.
Tonight
Mostly clear, with a low around 63. Light south wind.
Tuesday
Mostly sunny, with a high near 87. Light south wind increasing to 6 to 11 mph in the morning.
Tuesday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 67. Southwest wind 6 to 8 mph.
Wednesday
A 20 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 93. Southwest wind 9 to 11 mph.
Wednesday Night
Partly cloudy, with a low around 72.
Thursday
Sunny, with a high near 99.
Thursday Night
Mostly clear, with a low around 75.
Friday
Sunny, with a high near 99.
Friday Night
Partly cloudy, with a low around 73.
Independence Day
A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 94.
Saturday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 68.
Sunday
A 40 percent chance of showers. Mostly sunny, with a high near 90.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Derby CT
 41.34°N 73.09°W (Elev. 118 ft)
Last Update:
4:38 am EDT Jun 29, 2026
Forecast Valid:
4am EDT Jun 29, 2026-6pm EDT Jul 5, 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