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

Areas of Showers and Thunderstorms to Start the Work Week

Areas of rain and thunderstorms are forecast Monday across the central and eastern states. Some mixed rain and snow is possible in the high Sierra Mountains. Heavy to excessive rain may bring flooding in the central Appalachians. Read More >

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 NE 5 mph
Barometer 29.94 in (1013.6 mb)
Dewpoint 64°F (18°C)
Visibility 3.00 mi
Last update 20 Sep 10:53 pm EDT
Extended Forecast for

Derby CT

  • Tonight

    Tonight: A 30 percent chance of rain before 2am. Mostly cloudy, with a low around 56. Calm wind becoming north 5 to 8 mph after midnight.

    Low: 56 °F

    Chance Rain

  • Monday

    Monday: Partly sunny, with a high near 69. Northeast wind 9 to 13 mph.

    High: 69 °F

    Partly Sunny

  • Monday Night

    Monday Night: A 20 percent chance of rain after 2am. Mostly cloudy, with a low around 52. Northeast wind 5 to 9 mph.

    Low: 52 °F

    Mostly Cloudy
    then Slight
    Chance Rain

  • Tuesday

    Tuesday: A 40 percent chance of rain. Mostly cloudy, with a high near 64. Northeast wind around 11 mph.

    High: 64 °F

    Chance Rain

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 49. Northeast wind 10 to 14 mph.

    Low: 49 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 65.

    High: 65 °F

    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 47.

    Low: 47 °F

    Mostly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 65.

    High: 65 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 48.

    Low: 48 °F

    Mostly Cloudy

Detailed Forecast

Tonight
A 30 percent chance of rain before 2am. Mostly cloudy, with a low around 56. Calm wind becoming north 5 to 8 mph after midnight.
Monday
Partly sunny, with a high near 69. Northeast wind 9 to 13 mph.
Monday Night
A 20 percent chance of rain after 2am. Mostly cloudy, with a low around 52. Northeast wind 5 to 9 mph.
Tuesday
A 40 percent chance of rain. Mostly cloudy, with a high near 64. Northeast wind around 11 mph.
Tuesday Night
Mostly cloudy, with a low around 49. Northeast wind 10 to 14 mph.
Wednesday
Mostly cloudy, with a high near 65.
Wednesday Night
Mostly cloudy, with a low around 47.
Thursday
Partly sunny, with a high near 65.
Thursday Night
Mostly cloudy, with a low around 48.
Friday
A 40 percent chance of showers after 8am. Mostly cloudy, with a high near 65.
Friday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 49.
Saturday
A 30 percent chance of showers. Partly sunny, with a high near 67. Breezy.
Saturday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 50.
Sunday
A 30 percent chance of showers. Partly sunny, with a high near 70.
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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:
2:08 pm EDT Sep 20, 2026
Forecast Valid:
11pm EDT Sep 20, 2026-6pm EDT Sep 27, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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