Potomac River - Cornish Point Weather Forecast

    • 16
    • 43

    Decreasing Clouds

    • 21
    • 23

    Snow/Sleet

    • 25
    • 33

    Wintry Mix

    • 10
    • 29

    Partly Sunny

    • 17
    • 26

    Partly Sunny

    • 17
    • 28

    Slight Chance Snow

Today 23 Jan St. Marys

Mostly sunny. Highs in the mid 40s. Northwest Winds 5 to 10 Mph.

Tonight 23 Jan St. Marys

Partly cloudy in the Evening, then clearing. Cold with Lows around 12. North Winds 15 to 20 Mph with Gusts up to 30 Mph. Wind chill Values as low as 2 below after midnight.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Potomac River - Cornish Point Temperature Statistics

January Temperature

St Marys County Airport (10.6 miles)

  • Lowest 19 January, 2026

    19.4 °F

  • Average January

    38.6 °F

  • Highest 7 January, 2026

    65.7 °F

Climate (2021–Present)

St Marys County Airport (10.6 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2021–2026

    49.5 °F

  • Average 2021–2026

    58 °F

  • Average High 2021–2026

    66.7 °F
Get WillyWeather+ to remove ads