Potomac River - Cornfield Harbor Weather Forecast

    • 80
    • 86

    Decreasing Clouds

    • 77
    • 85

    Areas Smoke

    • 80
    • 89

    Rain Showers

    • 76
    • 87

    Rain Showers Likely

    • 78
    • 85

    Slight Chance Thunderstorms

    • 78
    • 88

    Chance Thunderstorms

Today 16 Jul St. Marys

Mostly sunny. Patchy smoke in the Morning, then Areas of smoke in the afternoon. Hot with Highs in the upper 90s. Northwest Winds around 5 Mph, becoming southwest in the afternoon.

Tonight 16 Jul St. Marys

Partly cloudy. Lows in the upper 70s. West Winds 5 to 10 Mph.

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Potomac River - Cornfield Harbor Temperature Statistics

July Temperature

St. Inigoes, Webster Field, Naval Electronic Systems Engineering Activity (6.8 miles)

  • Lowest 13 July, 2026

    66.9 °F

  • Average July

    80.8 °F

  • Highest 3 July, 2026

    98.1 °F

Climate (2021–2026)

St. Inigoes, Webster Field, Naval Electronic Systems Engineering Activity (6.8 miles)

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  • Average Low 2021–2026

    51.9 °F

  • Average 2021–2026

    60.4 °F

  • Average High 2021–2026

    68.7 °F
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