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.

Freezing Fog

28°F

-2°C

Humidity 96%
Wind Speed Calm
Barometer 30.00 in (1015.9 mb)
Dewpoint 27°F (-3°C)
Visibility 0.25 mi
Last update 18 Feb 3:53 am EST
Extended Forecast for

Derby CT

Dense Fog Advisory February 18, 04:07am until February 18, 10:00am
Click here for hazard details and duration
Dense Fog Advisory
  •  
    Dense Fog Advisory February 18, 04:07am until February 18, 10:00am

    NOW until 10:00am Wed

    Dense Fog Advisory

  • Overnight

    Low: 31 °F

    Slight Chance
    Snow and
    Dense Fog

  • Wednesday

    Wednesday: A slight chance of snow before 7am, then rain. Widespread dense fog, mainly before 10am. High near 41. Light and variable wind. Chance of precipitation is 80%. Little or no snow accumulation expected.

    High: 41 °F

    Rain/Snow and
    Dense Fog
    then Rain and
    Areas Fog

  • Wednesday Night

    Wednesday Night: Rain and snow before midnight, then a chance of rain between midnight and 1am. Areas of fog before 4am. Low around 30. Northeast wind 3 to 5 mph. Chance of precipitation is 80%. Little or no snow accumulation expected.

    Low: 30 °F

    Rain/Snow and
    Areas Fog
    then Chance
    Rain and
    Areas Fog

  • Thursday

    Thursday: Mostly cloudy, with a high near 40. Light and variable wind becoming southeast around 6 mph.

    High: 40 °F

    Mostly Cloudy

  • Thursday Night

    Thursday Night: A 50 percent chance of snow, mainly after 1am. Mostly cloudy, with a low around 29. Light east wind.

    Low: 29 °F

    Slight Chance
    Snow then
    Chance Snow

  • Friday

    Friday: Rain and snow, becoming all rain after 10am. High near 39. Chance of precipitation is 100%. New snow accumulation of less than a half inch possible.

    High: 39 °F

    Rain/Snow
    then Rain

  • Friday Night

    Friday Night: A 50 percent chance of rain before 1am. Mostly cloudy, with a low around 31.

    Low: 31 °F

    Chance Rain

  • Saturday

    Saturday: Partly sunny, with a high near 44.

    High: 44 °F

    Partly Sunny

Detailed Forecast

Overnight
A 20 percent chance of snow. Widespread dense fog. Otherwise, cloudy, with a low around 31. Calm wind.
Wednesday
A slight chance of snow before 7am, then rain. Widespread dense fog, mainly before 10am. High near 41. Light and variable wind. Chance of precipitation is 80%. Little or no snow accumulation expected.
Wednesday Night
Rain and snow before midnight, then a chance of rain between midnight and 1am. Areas of fog before 4am. Low around 30. Northeast wind 3 to 5 mph. Chance of precipitation is 80%. Little or no snow accumulation expected.
Thursday
Mostly cloudy, with a high near 40. Light and variable wind becoming southeast around 6 mph.
Thursday Night
A 50 percent chance of snow, mainly after 1am. Mostly cloudy, with a low around 29. Light east wind.
Friday
Rain and snow, becoming all rain after 10am. High near 39. Chance of precipitation is 100%. New snow accumulation of less than a half inch possible.
Friday Night
A 50 percent chance of rain before 1am. Mostly cloudy, with a low around 31.
Saturday
Partly sunny, with a high near 44.
Saturday Night
A chance of rain and snow before 1am, then a chance of snow. Mostly cloudy, with a low around 27. Chance of precipitation is 30%.
Sunday
A 50 percent chance of snow. Mostly cloudy, with a high near 37.
Sunday Night
Snow likely. Cloudy, with a low around 27. Chance of precipitation is 60%.
Monday
A 40 percent chance of snow. Mostly cloudy, with a high near 37.
Monday Night
Partly cloudy, with a low around 20.
Tuesday
Mostly sunny, with a high near 31.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Derby CT
 41.31°N 73.09°W (Elev. 115 ft)
Last Update:
1:31 am EST Feb 18, 2026
Forecast Valid:
4am EST Feb 18, 2026-6pm EST Feb 24, 2026
 
Forecast Discussion
 
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Additional Resources

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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