Columbia River - Kalama River Entrance Weather Forecast

    • 33
    • 55

    Mostly Sunny

    • 36
    • 61

    Mostly Cloudy

    • 36
    • 60

    Partly Sunny

    • 38
    • 59

    Chance Rain

    • 34
    • 54

    Chance Rain

    • 37
    • 56

    Chance Rain

Today 26 Mar Cowlitz County Lowlands

Sunny. Highs in the mid 50s. Winds light.

Tonight 26 Mar Cowlitz County Lowlands

Mostly clear. Widespread frost after midnight. Lows in the lower 30s. Winds light.

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Columbia River - Kalama River Entrance Temperature Statistics

March Temperature

Southwest Washington Regional Airport (5.6 miles)

  • Lowest 22 March, 2026

    28.9 °F

  • Average March

    47.6 °F

  • Highest 16 March, 2026

    66 °F

Climate (2021–Present)

Southwest Washington Regional Airport (5.6 miles)

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  • Average Low 2021–2026

    45.1 °F

  • Average 2021–2026

    53 °F

  • Average High 2021–2026

    62.5 °F
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