Ottawa Weather Forecast

    • 56
    • 70

    Increasing Clouds

    • 67
    • 85

    Rain Showers

    • 67
    • 77

    Rain Showers Likely

    • 65
    • 82

    Chance Rain Showers

    • 64
    • 78

    Chance Rain Showers

    • 62
    • 76

    Chance Rain Showers

Today 14 Sep Lucas

Sunny, cooler with Highs in the lower 70s. North Winds 5 to 10 Mph, becoming northeast this afternoon.

Tonight 14 Sep Lucas

Partly cloudy. Lows in the mid 50s. Southeast Winds 5 to 10 Mph.

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  • Temperature Real-Time

Ottawa Temperature Statistics

September Temperature

Lambertville, Toledo Suburban Airport (5.6 miles)

  • Lowest 11 September, 2026

    51.8 °F

  • Average September

    72.1 °F

  • Highest 2 September, 2026

    93.2 °F

Climate (2021–2026)

Lambertville, Toledo Suburban Airport (5.6 miles)

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  • Average Low 2021–2026

    42.6 °F

  • Average 2021–2026

    51.7 °F

  • Average High 2021–2026

    60.6 °F
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