Ottawa Weather Forecast

    • 53
    • 67

    Chance Thunderstorms

    • 45
    • 68

    Slight Chance Rain Showers

    • 41
    • 59

    Partly Sunny

    • 47
    • 66

    Slight Chance Rain Showers

    • 48
    • 69

    Slight Chance Rain Showers

    • 52
    • 76

    Partly Sunny

Today 1 May La Salle

Cloudy. Scattered Showers and a slight chance of Thunderstorms. Breezy. Highs in the mid 60s. West Winds 15 to 20 Mph with Gusts up to 30 Mph. Chance of precipitation 50 percent.

Tonight 1 May La Salle

Mostly cloudy. A chance of Showers in the Evening, then a slight chance of Thunderstorms after midnight. A slight chance of Showers after midnight. Lows in the lower 50s. West Winds 5 to 10 Mph. Chance of precipitation 40 percent.

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Ottawa Temperature Statistics

May Temperature

Illinois Valley Regional Airport (15.5 miles)

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Climate (2020–Present)

Illinois Valley Regional Airport (15.5 miles)

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  • Average Low 2020–2025

    43.1 °F

  • Average 2020–2025

    52.6 °F

  • Average High 2020–2025

    61.9 °F
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