Swift Reservoir Weather Forecast

    • 51
    • 69

    Increasing Clouds

    • 53
    • 72

    Decreasing Clouds

    • 52
    • 73

    Mostly Sunny

    • 60
    • 82

    Sunny

    • 62
    • 89

    Sunny

    • 59
    • 86

    Mostly Sunny

    • 56
    • 82

    Mostly Sunny

Today 18 Aug South Washington Cascade Foothills

Partly sunny. Highs in the mid 70s. Winds light.

Tonight 18 Aug South Washington Cascade Foothills

Mostly clear this Evening, then becoming partly cloudy. Patchy fog after midnight. Lows in the lower 50s. Winds light this Evening, becoming light and variable.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Swift Reservoir Temperature Statistics

August Temperature

Southwest Washington Regional Airport (37.3 miles)

  • Lowest 8 August, 2025

    50 °F

  • Average August

    68.4 °F

  • Highest 12 August, 2025

    99 °F

Climate (2020–Present)

Southwest Washington Regional Airport (37.3 miles)

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  • Average Low 2020–2025

    45 °F

  • Average 2020–2025

    52.8 °F

  • Average High 2020–2025

    62.2 °F
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