Lake Joy Weather Forecast

    • 51
    • 59

    Rain

    • 50
    • 65

    Mostly Cloudy

    • 48
    • 66

    Partly Sunny

    • 50
    • 73

    Mostly Sunny

    • 52
    • 77

    Mostly Sunny

    • 53
    • 80

    Mostly Sunny

Today 13 Sep Foothills and Valleys of Snohomish and Northern King Counties

Rain in the Morning, then cloudy with a chance of rain in the afternoon. Patchy fog in the afternoon. Rainfall Amounts a half inch to one inch possible. Highs in the upper 50s to mid 60s. Light wind.

Tonight 13 Sep Foothills and Valleys of Snohomish and Northern King Counties

Mostly cloudy. A chance of rain until early Morning, then a slight chance of rain in the morning. Lows in the lower to mid 50s. South wind to 10 Mph. Gusts to 25 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Lake Joy Temperature Statistics

September Temperature

Renton Municipal Airport (21.1 miles)

  • Lowest 6 September, 2026

    51.1 °F

  • Average September

    62.3 °F

  • Highest 9 September, 2026

    79 °F

Climate (2021–2026)

Renton Municipal Airport (21.1 miles)

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  • Average Low 2021–2026

    47.4 °F

  • Average 2021–2026

    54.7 °F

  • Average High 2021–2026

    62.2 °F
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