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.

Fair

51°F

11°C

Humidity 59%
Wind Speed SW 3 mph
Barometer 29.98 in (1015.1 mb)
Dewpoint 37°F (3°C)
Visibility 10.00 mi
Last update 9 Mar 8:53 pm EDT
Extended Forecast for

Derby CT

  • Tonight

    Tonight: Patchy fog after 2am. Otherwise, partly cloudy, with a low around 38. Calm wind.

    Low: 38 °F

    Partly Cloudy
    then Patchy
    Fog

  • Tuesday

    Tuesday: Patchy fog before 8am. Otherwise, mostly sunny, with a high near 66. Calm wind becoming south around 6 mph in the afternoon.

    High: 66 °F

    Patchy Fog
    then Sunny

  • Tuesday Night

    Tuesday Night: Patchy fog after 2am. Otherwise, partly cloudy, with a low around 41. Calm wind.

    Low: 41 °F

    Partly Cloudy
    then Patchy
    Fog

  • Wednesday

    Wednesday: A 30 percent chance of showers, mainly after 2pm. Patchy fog before 8am. Otherwise, mostly cloudy, with a high near 62. Calm wind becoming south 5 to 9 mph in the morning.

    High: 62 °F

    Chance
    Showers and
    Patchy Fog

  • Wednesday Night

    Wednesday Night: Showers likely, mainly between 8pm and 2am. Mostly cloudy, with a low around 51. South wind around 8 mph. Chance of precipitation is 60%.

    Low: 51 °F

    Showers
    Likely

  • Thursday

    Thursday: A chance of rain before 2pm, then a chance of rain and snow. Mostly cloudy, with a temperature falling to around 45 by 5pm. Chance of precipitation is 50%.

    High: 59 °F⇓

    Chance Rain
    then Chance
    Rain/Snow

  • Thursday Night

    Thursday Night: A 30 percent chance of snow before 8pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 28.

    Low: 28 °F

    Chance Snow
    then Partly
    Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 44.

    High: 44 °F

    Mostly Sunny

  • Friday Night

    Friday Night: A 40 percent chance of rain before 2am. Mostly cloudy, with a low around 34.

    Low: 34 °F

    Chance Rain

Detailed Forecast

Tonight
Patchy fog after 2am. Otherwise, partly cloudy, with a low around 38. Calm wind.
Tuesday
Patchy fog before 8am. Otherwise, mostly sunny, with a high near 66. Calm wind becoming south around 6 mph in the afternoon.
Tuesday Night
Patchy fog after 2am. Otherwise, partly cloudy, with a low around 41. Calm wind.
Wednesday
A 30 percent chance of showers, mainly after 2pm. Patchy fog before 8am. Otherwise, mostly cloudy, with a high near 62. Calm wind becoming south 5 to 9 mph in the morning.
Wednesday Night
Showers likely, mainly between 8pm and 2am. Mostly cloudy, with a low around 51. South wind around 8 mph. Chance of precipitation is 60%.
Thursday
A chance of rain before 2pm, then a chance of rain and snow. Mostly cloudy, with a temperature falling to around 45 by 5pm. Chance of precipitation is 50%.
Thursday Night
A 30 percent chance of snow before 8pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 28.
Friday
Mostly sunny, with a high near 44.
Friday Night
A 40 percent chance of rain before 2am. Mostly cloudy, with a low around 34.
Saturday
Mostly sunny, with a high near 48.
Saturday Night
Mostly cloudy, with a low around 31.
Sunday
A chance of rain and snow. Cloudy, with a high near 51. Chance of precipitation is 30%.
Sunday Night
Rain likely. Cloudy, with a low around 39. Chance of precipitation is 70%.
Monday
Rain likely. Mostly cloudy, with a high near 51. Chance of precipitation is 60%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Derby CT
 41.31°N 73.09°W (Elev. 115 ft)
Last Update:
9:06 pm EDT Mar 9, 2026
Forecast Valid:
9pm EDT Mar 9, 2026-6pm EDT Mar 16, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation