Saint Marys Lake Weather Forecast

    • 46
    • 63

    Mostly Cloudy

    • 52
    • 64

    Rain Showers

    • 52
    • 69

    Mostly Cloudy

    • 54
    • 67

    Mostly Cloudy

    • 52
    • 69

    Slight Chance Rain Showers

    • 50
    • 69

    Partly Sunny

Today 22 Sep Barnes

Partly sunny. Highs in the mid 60s. Breezy. Southeast Winds around 10 Mph increasing to around 20 Mph this afternoon.

Tonight 22 Sep Barnes

Partly cloudy. Lows in the mid 40s. Southeast Winds 10 to 20 Mph.

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Saint Marys Lake Temperature Statistics

September Temperature

Valley City (8.7 miles)

  • Lowest 16 September, 2026

    41 °F

  • Average September

    64.2 °F

  • Highest 4 September, 2026

    86 °F

Climate (2021–2026)

Valley City (8.7 miles)

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  • Average Low 2021–2026

    32.1 °F

  • Average 2021–2026

    42 °F

  • Average High 2021–2026

    51.9 °F
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