Riverside County Park Weather Forecast

    • 24
    • 44

    Becoming Sunny

    • 25
    • 44

    Mostly Sunny

    • 31
    • 44

    Mostly Cloudy

    • 34
    • 45

    Mostly Cloudy

    • 37
    • 51

    Chance Rain Showers

    • 38
    • 49

    Chance Rain Showers

Today 23 Jan Cowlitz County Lowlands

Widespread frost this morning. Sunny. Highs in the mid 40s. Winds light.

Tonight 23 Jan Cowlitz County Lowlands

Mostly clear. Widespread frost. Lows in the mid 20s. Winds light.

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Riverside County Park Temperature Statistics

January Temperature

Southwest Washington Regional Airport (5 miles)

  • Lowest 20 January, 2026

    24.1 °F

  • Average January

    42.1 °F

  • Highest 15 January, 2026

    55.9 °F

Climate (2021–Present)

Southwest Washington Regional Airport (5 miles)

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  • Average Low 2021–2026

    45.1 °F

  • Average 2021–2026

    52.9 °F

  • Average High 2021–2026

    62.4 °F
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