New Haven Weather Forecast

    • 68
    • 94

    Slight Chance Thunderstorms

    • 68
    • 94

    Mostly Cloudy

    • 63
    • 90

    Rain Showers Likely

    • 56
    • 78

    Rain Showers Likely

    • 51
    • 71

    Partly Sunny

    • 51
    • 73

    Partly Sunny

Today 18 Sep Franklin

Sunny. A slight chance of Showers and Thunderstorms this afternoon. Hot with Highs in the mid 90s. Southwest Winds around 5 Mph. Chance of rain 20 percent. Heat index Values up to 106.

Tonight 18 Sep Franklin

Partly cloudy. A slight chance of Showers and Thunderstorms in the evening. Lows around 70. South Winds around 5 Mph. Chance of rain 20 percent. Heat index Values up to 100 early in the evening.

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New Haven Temperature Statistics

September Temperature

Washington Regional Airport (11.8 miles)

  • Lowest 8 September, 2026

    62.6 °F

  • Average September

    80.7 °F

  • Highest 5 September, 2026

    102.2 °F

Climate (2021–2026)

Washington Regional Airport (11.8 miles)

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  • Average Low 2021–2026

    47.8 °F

  • Average 2021–2026

    58.5 °F

  • Average High 2021–2026

    69.7 °F
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