Charlestown Weather Forecast

    • 42
    • 69

    Increasing Clouds

    • 43
    • 66

    Rain Showers Likely

    • 46
    • 55

    Rain Showers

    • 52
    • 74

    Slight Chance Rain Showers

    • 55
    • 82

    Partly Sunny

    • 52
    • 81

    Slight Chance Rain Showers

Today 22 May Sullivan

Partly sunny. Highs in the upper 60s. Light and variable Winds.

Tonight 22 May Sullivan

Partly cloudy in the Evening, then becoming mostly cloudy. Lows in the lower 40s. Light and variable Winds.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Charlestown Temperature Statistics

May Temperature

Springfield, Hartness State Springfield Airport (8.7 miles)

  • Lowest 9 May, 2026

    30.7 °F

  • Average May

    54.5 °F

  • Highest 18 May, 2026

    89.1 °F

Climate (2021–Present)

Springfield, Hartness State Springfield Airport (8.7 miles)

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  • Average Low 2021–2026

    38.2 °F

  • Average 2021–2026

    48.4 °F

  • Average High 2021–2026

    58.9 °F
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