Black Lake Weather Forecast

    • 41
    • 57

    Rain Showers

    • 38
    • 58

    Mostly Cloudy

    • 41
    • 61

    Partly Sunny

    • 46
    • 60

    Rain Likely

    • 46
    • 56

    Rain Likely

    • 43
    • 59

    Chance Rain

Today 25 Sep Foothills and Valleys of Snohomish and Northern King Counties

Breezy. Showers likely and a slight chance of Thunderstorms in the Morning, then Showers and a chance of Thunderstorms in the afternoon. Rainfall Amounts a half inch to one inch Possible, except higher Amounts possible in Thunderstorms. Highs in the mid 50s to lower 60s. East wind 10 to 15 Mph becoming west 15 to 25 Mph in the afternoon. Gusts to 35 Mph.

Tonight 25 Sep Foothills and Valleys of Snohomish and Northern King Counties

Mostly cloudy. Showers likely in the Evening, then a chance of Showers late in the evening. A slight chance of Showers after midnight. Rainfall Amounts a quarter to a half inch possible. Lows in the 40s. Light wind becoming south to 10 Mph after midnight. Gusts to 20 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Black Lake Temperature Statistics

September Temperature

Renton Municipal Airport (24.9 miles)

  • Lowest 6 September, 2026

    51.1 °F

  • Average September

    61.4 °F

  • Highest 9 September, 2026

    79 °F

Climate (2021–2026)

Renton Municipal Airport (24.9 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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