Sunnyside Weather Forecast

    • 31
    • 55

    Mostly Sunny

    • 39
    • 61

    Increasing Clouds

    • 38
    • 66

    Partly Sunny

    • 41
    • 66

    Mostly Cloudy

    • 35
    • 61

    Partly Sunny

    • 41
    • 60

    Slight Chance Rain

    • 37
    • 59

    Chance Rain

Today 26 Mar Yakima Valley

Sunny. Widespread frost in the morning. Highs in the lower to mid 50s. Southwest wind 5 to 10 Mph.

Tonight 26 Mar Yakima Valley

Mostly clear. Lows in the lower 30s. Southeast wind 5 to 10 Mph in the Evening, becoming light.

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Sunnyside Temperature Statistics

March Temperature

Sunnyside Municipal Airport (1.9 miles)

  • Lowest 10 March, 2026

    22.8 °F

  • Average March

    45.3 °F

  • Highest 7 March, 2026

    71.4 °F

Climate (2021–Present)

Sunnyside Municipal Airport (1.9 miles)

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  • Average Low 2021–2026

    39.1 °F

  • Average 2021–2026

    51.5 °F

  • Average High 2021–2026

    63.6 °F
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