Charlestown Weather Forecast

    • 55
    • 82

    Mostly Sunny

    • 37
    • 73

    Mostly Sunny

    • 35
    • 69

    Mostly Sunny

    • 45
    • 73

    Partly Sunny

    • 56
    • 78

    Partly Sunny

    • 56
    • 81

    Chance Rain Showers

    • 54
    • 78

    Chance Rain Showers

Today 18 Sep Sullivan

Mostly sunny. Highs in the upper 70s. Light and variable Winds.

Tonight 18 Sep Sullivan

Mostly clear. Lows in the mid 50s. Light and variable Winds, becoming northwest around 10 Mph after midnight.

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Charlestown Temperature Statistics

September Temperature

Springfield, Hartness State Springfield Airport (8.7 miles)

  • Lowest 9 September, 2025

    37.9 °F

  • Average September

    62.3 °F

  • Highest 4 September, 2025

    82 °F

Climate (2020–Present)

Springfield, Hartness State Springfield Airport (8.7 miles)

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  • Average Low 2020–2025

    38.4 °F

  • Average 2020–2025

    48.4 °F

  • Average High 2020–2025

    58.9 °F
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