Lake Merwin Campers Hideaway Weather Forecast

    • 48
    • 63

    Rain Showers

    • 48
    • 57

    Rain Showers

    • 47
    • 63

    Partly Sunny

    • 50
    • 69

    Mostly Sunny

    • 54
    • 77

    Mostly Sunny

    • 55
    • 80

    Mostly Sunny

Today 12 Sep South Washington Cascade Foothills

Mostly cloudy. A chance of Showers with a slight chance of Thunderstorms this afternoon. Highs in the upper 60s. Winds light. Chance of rain 50 percent. Rainfall Amounts less than a tenth of an Inch, except higher Amounts possible in Thunderstorms.

Tonight 12 Sep South Washington Cascade Foothills

Patchy fog in the evening. Showers with a slight chance of Thunderstorms in the Evening, then Showers after midnight. Lows in the upper 40s. Southwest wind 5 to 10 Mph. Chance of rain near 100 percent. Rainfall Amounts a quarter to a half of an Inch, except higher Amounts possible in Thunderstorms.

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Lake Merwin Campers Hideaway Temperature Statistics

September Temperature

Southwest Washington Regional Airport (24.9 miles)

  • Lowest 4 September, 2026

    48 °F

  • Average September

    61.5 °F

  • Highest 9 September, 2026

    86 °F

Climate (2021–2026)

Southwest Washington Regional Airport (24.9 miles)

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  • Average Low 2021–2026

    45.2 °F

  • Average 2021–2026

    53.1 °F

  • Average High 2021–2026

    62.4 °F
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