Portage Bay Weather Forecast

    • 47
    • 54

    Rain

    • 48
    • 57

    Rain

    • 44
    • 55

    Rain

    • 44
    • 54

    Rain

    • 43
    • 53

    Rain

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    • 54

    Rain

Today 18 Sep Petersburg Borough

Rain. Rain may be heavy at Times in the afternoon. Highs 54 to 59. Light Winds becoming southeast 10 to 20 Mph.

Tonight 18 Sep Petersburg Borough

Rain. Rain may be heavy at Times in the evening. Lows in the upper 40s. Southeast Winds 10 to 15 Mph.

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Portage Bay Temperature Statistics

September Temperature

Petersburg (19.3 miles)

  • Lowest 14 September, 2025

    39 °F

  • Average September

    54.3 °F

  • Highest 2 September, 2025

    66.9 °F

Climate (2020–Present)

Petersburg (19.3 miles)

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  • Average Low 2020–2025

    38.2 °F

  • Average 2020–2025

    43.5 °F

  • Average High 2020–2025

    48.9 °F
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