St. Mary's County Regional Airport Weather Forecast

    • 62
    • 79

    Becoming Sunny

    • 63
    • 83

    Mostly Sunny

    • 63
    • 76

    Partly Sunny

    • 62
    • 74

    Slight Chance Thunderstorms

    • 62
    • 76

    Mostly Cloudy

    • 64
    • 78

    Mostly Cloudy

Today 18 Sep St. Marys

Mostly sunny. Highs in the upper 70s. Northwest Winds around 5 Mph.

Tonight 18 Sep St. Marys

Mostly clear. Lows in the lower 60s. Southwest Winds around 5 Mph.

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St. Mary's County Regional Airport Temperature Statistics

September Temperature

St Marys County Airport (0 miles)

  • Lowest 3 September, 2025

    53.2 °F

  • Average September

    68.3 °F

  • Highest 4 September, 2025

    86.9 °F

Climate (2020–Present)

St Marys County Airport (0 miles)

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  • Average Low 2020–2025

    49.6 °F

  • Average 2020–2025

    58.1 °F

  • Average High 2020–2025

    66.8 °F
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