Mount Martha Weather Forecast

    • 41
    • 62

    Rain Showers

    • 42
    • 63

    Mostly Sunny

    • 45
    • 67

    Mostly Sunny

    • 48
    • 71

    Partly Sunny

    • 48
    • 70

    Partly Sunny

    • 43
    • 68

    Partly Sunny

Today 14 Sep Southern Coos

Partly sunny. Isolated Showers this morning. Patchy fog this morning. Highs in the lower 70s. Light and variable Winds. Chance of rain 20 percent.

Tonight 14 Sep Southern Coos

Mostly clear. Patchy fog after midnight. Lows in the mid 40s. Light and variable Winds.

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Mount Martha Temperature Statistics

September Temperature

Mount Washington (10.6 miles)

  • Lowest 8 September, 2025

    32 °F

  • Average September

    44.4 °F

  • Highest 2 September, 2025

    55.4 °F

Climate (2020–Present)

Mount Washington (10.6 miles)

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  • Average Low 2020–2025

    24.8 °F

  • Average 2020–2025

    30.1 °F

  • Average High 2020–2025

    35.3 °F
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