Tumwater Weather Forecast

    • 55
    • 78

    Increasing Clouds

    • 54
    • 80

    Partly Sunny

    • 57
    • 85

    Mostly Sunny

    • 58
    • 87

    Partly Sunny

    • 57
    • 85

    Partly Sunny

    • 56
    • 82

    Partly Sunny

Today 31 Aug Olympia and Southern Puget Sound

Mostly sunny. Patchy fog late in the morning. A slight chance of Thunderstorms in the late morning and early afternoon. Highs in the 70s. Light wind becoming west to 10 Mph in the afternoon.

Tonight 31 Aug Olympia and Southern Puget Sound

Partly cloudy. Lows in the mid to upper 50s. West wind to 10 Mph becoming southwest after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Tumwater Temperature Statistics

August Temperature

Olympia, Olympia Airport (1.9 miles)

  • Lowest 21 August, 2025

    45.6 °F

  • Average August

    67.1 °F

  • Highest 12 August, 2025

    95.6 °F

Climate (2020–Present)

Olympia, Olympia Airport (1.9 miles)

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  • Average Low 2020–2025

    41.6 °F

  • Average 2020–2025

    51.5 °F

  • Average High 2020–2025

    62.1 °F
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