Treasure Valley Park Weather Forecast

    • 75
    • 104

    Hot

    • 76
    • 101

    Slight Chance Thunderstorms

    • 73
    • 99

    Hot

    • 66
    • 94

    Sunny

    • 68
    • 93

    Mostly Sunny

    • 68
    • 91

    Slight Chance Thunderstorms

Today 10 Sep Lower Washington County

Sunny. Highs around 104.

Tonight 10 Sep Lower Washington County

Mostly clear. Lows in the mid 70s.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Treasure Valley Park Temperature Statistics

September Temperature

St George Municipal Airport (1.9 miles)

  • Lowest 7 September, 2026

    62.1 °F

  • Average September

    80.1 °F

  • Highest 5 September, 2026

    97 °F

Climate (2021–2026)

St George Municipal Airport (1.9 miles)

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

  • Average Low 2021–2026

    53 °F

  • Average 2021–2026

    64.8 °F

  • Average High 2021–2026

    76.8 °F
Get WillyWeather+ to remove ads