Saint Marys Lake Weather Forecast

    • 63
    • 83

    Severe Tstms

    • 59
    • 76

    Severe Tstms

    • 60
    • 79

    Slight Chance Thunderstorms

    • 65
    • 82

    Chance Thunderstorms

    • 66
    • 87

    Slight Chance Thunderstorms

    • 66
    • 87

    Chance Thunderstorms

Today 22 Jul Barnes

Partly sunny with scattered Showers and Thunderstorms. Highs in the mid 80s. South Winds around 5 Mph and gusty. Chance of rain 50 percent.

Tonight 22 Jul Barnes

Numerous Thunderstorms and scattered Showers in the Evening, then numerous Showers and scattered Thunderstorms after midnight. Some Thunderstorms may be severe after midnight. Lows in the mid 60s. Northeast Winds 5 to 15 Mph. Chance of rain 70 percent.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Saint Marys Lake Temperature Statistics

July Temperature

Valley City (8.7 miles)

  • Lowest 17 July, 2025

    44.6 °F

  • Average July

    69.4 °F

  • Highest 4 July, 2025

    91.4 °F

Climate (2020–Present)

Valley City (8.7 miles)

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

  • Average Low 2020–2025

    31.8 °F

  • Average 2020–2025

    41.9 °F

  • Average High 2020–2025

    51.8 °F
Get WillyWeather+ to remove ads