Great Swamp Weather Forecast

    • 56
    • 64

    Rain

    • 54
    • 62

    Rain

    • 55
    • 69

    Mostly Cloudy

    • 58
    • 74

    Partly Sunny

    • 61
    • 78

    Partly Sunny

    • 52
    • 74

    Mostly Cloudy

    • 49
    • 67

    Partly Sunny

Today 27 Sep Putnam

Partly sunny with a 30 percent chance of Showers. Highs in the mid 60s.

Tonight 27 Sep Putnam

Rain with a slight chance of Thunderstorms. Lows in the mid 50s. Northeast Winds 10 to 15 Mph with Gusts up to 25 Mph. Chance of rain near 100 percent.

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Great Swamp Temperature Statistics

September Temperature

Danbury, Danbury Municipal Airport (10.6 miles)

  • Lowest 15 September, 2026

    44.1 °F

  • Average September

    65.1 °F

  • Highest 10 September, 2026

    82.9 °F

Climate (2021–2026)

Danbury, Danbury Municipal Airport (10.6 miles)

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  • Average Low 2021–2026

    43.3 °F

  • Average 2021–2026

    53.4 °F

  • Average High 2021–2026

    63 °F
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