Mendenhall Valley Weather Forecast

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    Rain Showers

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    Rain Showers

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    Rain Showers

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    Rain Showers Likely

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    Rain Showers

Today 27 Sep City and Borough of Juneau

Rain Showers. Highs in the lower 50s.

Tonight 27 Sep City and Borough of Juneau

Rain Showers likely early in the Evening, then chance of rain Showers in the evening. Rain Showers likely late. Lows in the mid 40s. East Winds around 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Mendenhall Valley Temperature Statistics

September Temperature

Juneau, Juneau International Airport (1.2 miles)

  • Lowest 25 September, 2026

    33.1 °F

  • Average September

    52.2 °F

  • Highest 3 September, 2026

    71.1 °F

Climate (2021–2026)

Juneau, Juneau International Airport (1.2 miles)

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  • Average Low 2021–2026

    37.1 °F

  • Average 2021–2026

    42.9 °F

  • Average High 2021–2026

    48.6 °F
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