Marine On St Croix Weather Forecast

    • 53
    • 61

    Rain Showers

    • 51
    • 63

    Drizzle Likely

    • 44
    • 69

    Mostly Cloudy

    • 41
    • 65

    Mostly Cloudy

    • 42
    • 65

    Mostly Sunny

    • 47
    • 67

    Partly Sunny

    • 49
    • 69

    Partly Sunny

Today 18 Sep Washington

Mostly sunny. Highs in the lower 70s.

Tonight 18 Sep Washington

Cloudy. Patchy fog through the night. Rain Showers likely in the evening. Slight chance of Thunderstorms through the night. Chance of rain Showers and drizzle after midnight. Lows in the mid 50s. East Winds 10 to 15 Mph with Gusts to around 30 Mph. Chance of precipitation 70 percent.

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Marine On St Croix Temperature Statistics

September Temperature

L O Simenstad Municipal Airport (8.1 miles)

  • Lowest 14 September, 2026

    41.7 °F

  • Average September

    69.7 °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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