Junction City Weather Forecast

    • 52
    • 70

    Mostly Cloudy

    • 54
    • 71

    Partly Sunny

    • 54
    • 66

    Mostly Cloudy

    • 53
    • 72

    Mostly Cloudy

    • 57
    • 79

    Partly Sunny

    • 56
    • 72

    Chance Rain

Today 5 Sep Lower Chehalis River Valley

Partly sunny. Highs in the upper 60s to mid 70s. Light wind becoming west to 10 Mph in the afternoon.

Tonight 5 Sep Lower Chehalis River Valley

Mostly cloudy with a slight chance of rain in the Evening, then mostly cloudy after midnight. Lows near 50. Light wind.

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Junction City Temperature Statistics

September Temperature

Hoquiam, Bowerman Airport (6.8 miles)

  • Lowest 2 September, 2026

    57.9 °F

  • Average September

    61.8 °F

  • Highest 1 September, 2026

    66.7 °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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