Marine On St Croix Weather Forecast

    • 60
    • 85

    Mostly Cloudy

    • 64
    • 85

    Slight Chance Thunderstorms

    • 64
    • 82

    Chance Rain Showers

    • 65
    • 80

    Rain Showers

    • 62
    • 83

    Chance Thunderstorms

    • 54
    • 80

    Partly Sunny

    • 53
    • 75

    Partly Sunny

Today 4 Sep Washington

Mostly sunny. Highs in the mid 80s. North Winds up to 10 Mph.

Tonight 4 Sep Washington

Increasing Clouds. Patchy fog after midnight. Lows in the lower 60s. Northeast Winds up to 10 Mph.

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Marine On St Croix Temperature Statistics

September Temperature

L O Simenstad Municipal Airport (8.1 miles)

  • Lowest 2 September, 2026

    64.9 °F

  • Average September

    76.2 °F

  • Highest 1 September, 2026

    88 °F

Climate (2021–2026)

L O Simenstad Municipal Airport (8.1 miles)

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  • Average Low 2021–2026

    37.2 °F

  • Average 2021–2026

    47.5 °F

  • Average High 2021–2026

    57 °F
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