Porter Weather Forecast

    • 53
    • 72

    Rain Likely

    • 52
    • 73

    Slight Chance Rain

    • 52
    • 74

    Mostly Cloudy

    • 54
    • 76

    Mostly Cloudy

    • 50
    • 79

    Mostly Sunny

    • 51
    • 83

    Mostly Sunny

Today 16 Aug Middle Chehalis River Valley

Mostly cloudy with a chance of rain until late Afternoon, then partly sunny with a slight chance of rain late in the afternoon. Highs in the upper 60s to mid 70s. Southwest wind to 10 Mph with Gusts to 20 Mph.

Tonight 16 Aug Middle Chehalis River Valley

Partly cloudy with a slight chance of rain in the Evening, then mostly cloudy after midnight. Mostly cloudy with a slight chance of rain in the morning. Patchy fog in the morning. Lows in the lower to mid 50s. West wind to 10 Mph with Gusts to 20 Mph in the evening becoming light.

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Porter Temperature Statistics

August Temperature

Olympia, Olympia Airport (19.3 miles)

  • Lowest 3 August, 2025

    46.7 °F

  • Average August

    66.7 °F

  • Highest 12 August, 2025

    95.6 °F

Climate (2020–Present)

Olympia, Olympia Airport (19.3 miles)

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  • Average Low 2020–2025

    41.6 °F

  • Average 2020–2025

    51.5 °F

  • Average High 2020–2025

    62 °F
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