Sunnyside Park Weather Forecast

    • 34
    • 49

    Chance Rain Showers

    • 36
    • 56

    Slight Chance Rain/Snow

    • 40
    • 62

    Partly Sunny

    • 41
    • 64

    Partly Sunny

    • 42
    • 66

    Partly Sunny

    • 44
    • 71

    Mostly Sunny

    • 44
    • 71

    Mostly Sunny

Today 16 May Washington Palouse

Rain Showers likely and a chance of Thunderstorms. Highs in the upper 40s to mid 50s. Southwest wind 5 to 15 Mph with Gusts up to 30 Mph. Chance of precipitation 70 percent. Rainfall Amounts less than a tenth of an Inch, except higher Amounts possible in Thunderstorms.

Tonight 16 May Washington Palouse

A chance of Thunderstorms in the evening. Mostly cloudy with a chance of rain Showers. Lows in the 30s. Southwest wind 5 to 10 Mph with Gusts up to 25 Mph. Chance of precipitation 50 percent. Rainfall Amounts less than a tenth of an Inch, except higher Amounts possible in Thunderstorms.

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Sunnyside Park Temperature Statistics

May Temperature

Pullman / Moscow Regional Airport (3.7 miles)

  • Lowest 8 May, 2026

    39.7 °F

  • Average May

    58.2 °F

  • Highest 12 May, 2026

    85.6 °F

Climate (2021–Present)

Pullman / Moscow Regional Airport (3.7 miles)

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  • Average Low 2021–2026

    39.5 °F

  • Average 2021–2026

    49.6 °F

  • Average High 2021–2026

    59.7 °F
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