Junction City Weather Forecast

    • 53
    • 68

    Rain

    • 55
    • 66

    Chance Rain

    • 48
    • 66

    Mostly Cloudy

    • 50
    • 73

    Mostly Sunny

    • 54
    • 81

    Mostly Sunny

    • 54
    • 82

    Partly Sunny

Today 12 Sep Lower Chehalis River Valley

Mostly cloudy. A slight chance of rain early in the afternoon. A chance of rain late in the afternoon. Highs in the mid 60s to lower 70s. Light wind becoming west to 10 Mph in the afternoon.

Tonight 12 Sep Lower Chehalis River Valley

A chance of Showers and a slight chance of Thunderstorms in the Evening, then rain likely after midnight. Rainfall Amounts a quarter to a half inch Possible, except higher Amounts possible in Thunderstorms. Lows in the lower to mid 50s. Light wind.

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Junction City Temperature Statistics

September Temperature

Hoquiam, Bowerman Airport (6.8 miles)

  • Lowest 8 September, 2026

    48.7 °F

  • Average September

    61 °F

  • Highest 9 September, 2026

    72 °F

Climate (2021–2026)

Hoquiam, Bowerman Airport (6.8 miles)

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  • Average Low 2021–2026

    46.3 °F

  • Average 2021–2026

    52.4 °F

  • Average High 2021–2026

    58.6 °F
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