Ottawa Weather Forecast

    • 66
    • 82

    Rain Showers

    • 54
    • 80

    Slight Chance Thunderstorms

    • 55
    • 79

    Sunny

    • 59
    • 83

    Partly Sunny

    • 62
    • 83

    Partly Sunny

    • 65
    • 87

    Chance Rain Showers

Today 21 Jul Montour

A chance of Showers with a slight chance of Thunderstorms in the Morning, then Showers with a chance of Thunderstorms in the afternoon. Some Thunderstorms may be severe with damaging Winds and large hail in the afternoon. More humid with Highs in the lower 80s. South Winds 5 to 10 Mph with Gusts up to 20 Mph. Chance of rain near 100 percent.

Tonight 21 Jul Montour

Mostly cloudy with a chance of Showers with a slight chance of Thunderstorms. Not as cool. Near steady temperature in the upper 60s. Southeast Winds 5 to 10 Mph with Gusts up to 20 Mph. Chance of rain 50 percent.

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Ottawa Temperature Statistics

July Temperature

Williamsport - Lycoming County Airport (15.5 miles)

  • Lowest 17 July, 2026

    60.7 °F

  • Average July

    79.2 °F

  • Highest 2 July, 2026

    100.7 °F

Climate (2021–2026)

Williamsport - Lycoming County Airport (15.5 miles)

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  • Average Low 2021–2026

    43.6 °F

  • Average 2021–2026

    53 °F

  • Average High 2021–2026

    63.3 °F
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