Pioneer Park Weather Forecast

    • 51
    • 79

    Mostly Sunny

    • 54
    • 74

    Chance Rain Showers

    • 54
    • 79

    Mostly Sunny

    • 53
    • 81

    Mostly Sunny

    • 55
    • 84

    Mostly Sunny

    • 54
    • 82

    Mostly Sunny

    • 52
    • 78

    Partly Sunny

Today 16 Sep Foothills of the Blue Mountains of Washington

Sunny. Highs in the upper 70s to lower 80s. North wind 5 to 10 Mph.

Tonight 16 Sep Foothills of the Blue Mountains of Washington

Clear. Lows in the upper 40s to lower 50s. Northeast wind 5 to 10 Mph in the Evening, becoming light.

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Pioneer Park Temperature Statistics

September Temperature

Walla Walla Regional Airport (2.5 miles)

  • Lowest 4 September, 2026

    49.6 °F

  • Average September

    64.3 °F

  • Highest 9 September, 2026

    86.6 °F

Climate (2021–2026)

Walla Walla Regional Airport (2.5 miles)

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  • Average Low 2021–2026

    45.3 °F

  • Average 2021–2026

    54.8 °F

  • Average High 2021–2026

    64.5 °F
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