Saint Marys Lake Weather Forecast

    • 56
    • 84

    Partly Sunny

    • 56
    • 78

    Chance Rain Showers

    • 58
    • 78

    Chance Rain Showers

    • 57
    • 78

    Slight Chance Thunderstorms

    • 54
    • 76

    Slight Chance Thunderstorms

    • 55
    • 73

    Chance Rain Showers

Today 8 Aug Barnes

Mostly sunny. Highs in the mid 80s. Southwest Winds 5 to 15 Mph.

Tonight 8 Aug Barnes

Partly cloudy. Lows 50 to 55. Light and variable Winds becoming southwest around 5 Mph after midnight.

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Saint Marys Lake Temperature Statistics

August Temperature

Valley City (8.7 miles)

  • Lowest 5 August, 2026

    46.4 °F

  • Average August

    68.9 °F

  • Highest 2 August, 2026

    89.6 °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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