Hat Rock State Park Weather Forecast

    • 57
    • 85

    Mostly Sunny

    • 58
    • 86

    Mostly Sunny

    • 61
    • 87

    Mostly Sunny

    • 51
    • 78

    Mostly Sunny

    • 54
    • 79

    Sunny

    • 56
    • 84

    Partly Sunny

Today 18 Sep Lower Columbia Basin of Oregon

Sunny. Highs in the lower to mid 80s. West wind 5 to 10 Mph.

Tonight 18 Sep Lower Columbia Basin of Oregon

Mostly clear. Lows in the mid to upper 50s. Light Wind, becoming southwest 5 to 10 Mph overnight.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Hat Rock State Park Temperature Statistics

September Temperature

Hermiston, Hermiston Municipal Airport (7.5 miles)

  • Lowest 16 September, 2025

    48 °F

  • Average September

    72.3 °F

  • Highest 2 September, 2025

    98.1 °F

Climate (2020–Present)

Hermiston, Hermiston Municipal Airport (7.5 miles)

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

  • Average Low 2020–2025

    42.9 °F

  • Average 2020–2025

    55.2 °F

  • Average High 2020–2025

    67.6 °F
Get WillyWeather+ to remove ads