Ottawa Weather Forecast

    • 52
    • 77

    Increasing Clouds

    • 59
    • 80

    Partly Sunny

    • 67
    • 85

    Chance Rain Showers

    • 57
    • 81

    Rain Showers Likely

    • 54
    • 75

    Mostly Sunny

    • 60
    • 78

    Partly Sunny

Today 7 Sep Montour

Patchy fog in the morning. Sunny. Highs in the mid 70s. Light and variable Winds.

Tonight 7 Sep Montour

Partly cloudy. Patchy fog after midnight. Lows in the lower 50s. Light and variable Winds.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Ottawa Temperature Statistics

September Temperature

Williamsport - Lycoming County Airport (15.5 miles)

  • Lowest 1 September, 2026

    68.6 °F

  • Average September

    77.3 °F

  • Highest 1 September, 2026

    92.6 °F

Climate (2021–2026)

Williamsport - Lycoming County Airport (15.5 miles)

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  • Average Low 2021–2026

    43.5 °F

  • Average 2021–2026

    53 °F

  • Average High 2021–2026

    63.3 °F
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