Swift Reservoir Weather Forecast

    • 41
    • 56

    Decreasing Clouds

    • 40
    • 57

    Partly Sunny

    • 45
    • 64

    Mostly Sunny

    • 54
    • 74

    Mostly Sunny

    • 57
    • 77

    Partly Sunny

    • 50
    • 69

    Partly Sunny

Today 29 May South Washington Cascade Foothills

Partly sunny. Highs in the lower 60s. West wind 10 to 15 Mph.

Tonight 29 May South Washington Cascade Foothills

Partly cloudy in the Evening, then becoming mostly cloudy. Lows in the lower 40s. Northwest wind 10 to 15 Mph, easing to light after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Swift Reservoir Temperature Statistics

May Temperature

Southwest Washington Regional Airport (37.3 miles)

  • Lowest 17 May, 2026

    39.9 °F

  • Average May

    59 °F

  • Highest 3 May, 2026

    91 °F

Climate (2021–Present)

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

    62.6 °F
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