Charleston Weather Forecast

    • 43
    • 86

    Partly Sunny

    • 37
    • 61

    Mostly Sunny

    • 38
    • 68

    Mostly Sunny

    • 43
    • 69

    Mostly Cloudy

    • 42
    • 65

    Chance Rain Showers

    • 45
    • 60

    Rain Showers Likely

Today 20 May Southern Penobscot

Mostly sunny with isolated Showers. Hot. Near steady temperature in the mid 80s. West Winds 15 to 20 Mph with Gusts up to 30 Mph. Chance of rain 20 percent.

Tonight 20 May Southern Penobscot

Partly cloudy. Much cooler with Lows in the mid 40s. Northwest Winds 10 to 15 Mph with Gusts up to 30 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Charleston Temperature Statistics

May Temperature

Bangor, Bangor International Airport (22.4 miles)

  • Lowest 2 May, 2026

    30.7 °F

  • Average May

    51.7 °F

  • Highest 17 May, 2026

    78.7 °F

Climate (2021–Present)

Bangor, Bangor International Airport (22.4 miles)

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  • Average Low 2021–2026

    37.3 °F

  • Average 2021–2026

    47.1 °F

  • Average High 2021–2026

    56.7 °F
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