Black Diamond Lake Weather Forecast

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    Rain/Snow

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    Rain

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    Rain

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    Chance Rain

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    Rain Likely

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    Rain/Snow Likely

Today 20 Dec Foothills and Valleys of Pierce and Southern King Counties

Mostly cloudy with a chance of rain in the Morning, then rain at Times in the afternoon. Rainfall Amounts a quarter to a half inch possible. Highs in the 40s. South wind 10 to 15 Mph with Gusts to 25 Mph.

Tonight 20 Dec Foothills and Valleys of Pierce and Southern King Counties

Rain at Times in the Evening, then rain likely in the late evening and early morning. A chance of rain in the morning. Rainfall Amounts a tenth to a quarter of an inch possible. Lows near 40. South wind 10 to 15 Mph with Gusts to 25 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Black Diamond Lake Temperature Statistics

December Temperature

Renton Municipal Airport (16.2 miles)

  • Lowest 1 December, 2025

    33.1 °F

  • Average December

    49.3 °F

  • Highest 15 December, 2025

    60.1 °F

Climate (2020–Present)

Renton Municipal Airport (16.2 miles)

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  • Average Low 2020–2025

    47.4 °F

  • Average 2020–2025

    54.6 °F

  • Average High 2020–2025

    62.3 °F
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