Lake Sylvester Weather Forecast

    • 30
    • 46

    Rain Showers Likely

    • 30
    • 41

    Partly Sunny

    • 38
    • 49

    Partly Sunny

    • 46
    • 56

    Partly Sunny

    • 49
    • 64

    Partly Sunny

    • 43
    • 60

    Chance Rain Showers

Today 29 May Western Chelan County

Mostly cloudy. Rain Showers likely in the Morning, then a chance of rain Showers in the afternoon. Highs in the upper 50s to upper 60s. Breezy. Northwest wind 5 to 15 Mph in the afternoon. Gusts up to 35 Mph. Chance of precipitation 70 percent. Rainfall Amounts less than a tenth of an inch.

Tonight 29 May Western Chelan County

Partly cloudy. Lows in the upper 30s to upper 40s. Windy. Northwest wind 5 to 15 Mph in the Evening, becoming light and variable. Gusts up to 40 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Lake Sylvester Temperature Statistics

May Temperature

Stampede Pass (31.1 miles)

  • Lowest 16 May, 2026

    30 °F

  • Average May

    47.7 °F

  • Highest 3 May, 2026

    71.1 °F

Climate (2021–Present)

Stampede Pass (31.1 miles)

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  • Average Low 2021–2026

    36.3 °F

  • Average 2021–2026

    41.7 °F

  • Average High 2021–2026

    48.4 °F
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