Grass Lake Weather Forecast

    • 36
    • 43

    Rain

    • 32
    • 47

    Rain

    • 28
    • 38

    Rain/Snow

    • 25
    • 38

    Snow Showers

    • 21
    • 36

    Chance Snow Showers

    • 19
    • 35

    Chance Snow Showers

Today 30 Jan East Puget Sound Lowlands

Mostly cloudy. A slight chance of rain late in the afternoon. Highs in the lower to mid 40s. Light wind.

Tonight 30 Jan East Puget Sound Lowlands

Cloudy with a chance of rain in the Evening, then rain after midnight. Rainfall Amounts a quarter to a half inch possible. Lows in the mid 30s to lower 40s. Southeast wind to 10 Mph increasing to 10 to 15 Mph after Midnight, Gusts to 25 Mph after midnight.

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Grass Lake Temperature Statistics

January Temperature

Renton Municipal Airport (12.4 miles)

  • Lowest 20 January, 2025

    25.8 °F

  • Average January

    41.1 °F

  • Highest 8 January, 2025

    52.6 °F

Climate (2020–Present)

Renton Municipal Airport (12.4 miles)

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  • Average Low 2020–2025

    47.1 °F

  • Average 2020–2025

    54.3 °F

  • Average High 2020–2025

    62 °F
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