Charlestown Weather Forecast

    • 42
    • 75

    Mostly Cloudy

    • 43
    • 66

    Partly Sunny

    • 49
    • 60

    Rain Showers

    • 43
    • 64

    Mostly Cloudy

    • 42
    • 62

    Mostly Cloudy

    • 43
    • 62

    Mostly Cloudy

    • 46
    • 59

    Chance Rain Showers

Today 18 Sep Sullivan

Mostly sunny. Highs in the upper 60s. Northwest Winds around 10 Mph with Gusts up to 25 Mph.

Tonight 18 Sep Sullivan

Partly cloudy. Lows in the lower 40s. North Winds around 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Charlestown Temperature Statistics

September Temperature

Springfield, Hartness State Springfield Airport (8.7 miles)

  • Lowest 15 September, 2026

    40.6 °F

  • Average September

    63.2 °F

  • Highest 10 September, 2026

    81.6 °F

Climate (2021–2026)

Springfield, Hartness State Springfield Airport (8.7 miles)

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  • Average Low 2021–2026

    38.2 °F

  • Average 2021–2026

    48.6 °F

  • Average High 2021–2026

    59.2 °F
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