Casco Weather Forecast

    • 46
    • 86

    Slight Chance Thunderstorms

    • 37
    • 63

    Partly Sunny

    • 44
    • 67

    Partly Sunny

    • 42
    • 65

    Mostly Cloudy

    • 41
    • 55

    Chance Rain Showers

    • 46
    • 64

    Chance Rain Showers

    • 49
    • 73

    Slight Chance Rain Showers

Today 20 May Central Interior Cumberland

Partly sunny with isolated Showers. Warm with Highs in the upper 80s. West Winds 15 to 20 Mph with Gusts up to 35 Mph. Chance of rain 20 percent.

Tonight 20 May Central Interior Cumberland

Partly cloudy with isolated Showers in the Evening, then mostly cloudy after midnight. Less humid with Lows in the upper 40s. Northwest Winds 10 to 15 Mph with Gusts up to 25 Mph. Chance of rain 20 percent.

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Casco Temperature Statistics

May Temperature

Auburn-Lewiston (11.8 miles)

  • Lowest 4 May, 2026

    27 °F

  • Average May

    52.1 °F

  • Highest 17 May, 2026

    81 °F

Climate (2021–Present)

Auburn-Lewiston (11.8 miles)

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  • Average Low 2021–2026

    37.7 °F

  • Average 2021–2026

    47.5 °F

  • Average High 2021–2026

    57 °F
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