Swift Reservoir Weather Forecast

    • 46
    • 59

    Rain Likely

    • 50
    • 66

    Partly Sunny

    • 54
    • 75

    Partly Sunny

    • 52
    • 66

    Rain Likely

    • 51
    • 56

    Rain

    • 49
    • 58

    Rain Likely

Today 29 Aug South Washington Cascade Foothills

Mostly cloudy this Morning, then becoming partly sunny. A 50 percent chance of rain. Highs in the upper 60s. West wind 5 to 10 Mph. Rainfall Amounts around a tenth of an inch.

Tonight 29 Aug South Washington Cascade Foothills

Partly cloudy in the Evening, then becoming mostly cloudy. Patchy fog after midnight. Lows in the upper 40s. Winds light in the 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 9 August, 2026

    54 °F

  • Average August

    67.7 °F

  • Highest 5 August, 2026

    93.9 °F

Climate (2021–2026)

Southwest Washington Regional Airport (37.3 miles)

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  • Average Low 2021–2026

    45.2 °F

  • Average 2021–2026

    53.1 °F

  • Average High 2021–2026

    62.5 °F
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