Ottawa Weather Forecast

    • 59
    • 82

    Chance Rain Showers

    • 44
    • 74

    Rain Showers Likely

    • 42
    • 62

    Mostly Sunny

    • 54
    • 71

    Partly Sunny

    • 67
    • 83

    Chance Thunderstorms

    • 53
    • 80

    Chance Rain Showers

Today 24 Apr La Salle

Partly cloudy. Highs in the lower 80s. Southeast Winds 5 to 10 Mph.

Tonight 24 Apr La Salle

Partly cloudy in the Evening, then becoming mostly cloudy. A chance of Showers in the late evening and overnight. A slight chance of Thunderstorms after midnight. Lows in the upper 50s. East Winds 5 to 10 Mph. Chance of precipitation 50 percent.

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Ottawa Temperature Statistics

April Temperature

Illinois Valley Regional Airport (15.5 miles)

  • Lowest 8 April, 2025

    25.5 °F

  • Average April

    49.6 °F

  • Highest 18 April, 2025

    78.6 °F

Climate (2020–Present)

Illinois Valley Regional Airport (15.5 miles)

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  • Average Low 2020–2025

    43.1 °F

  • Average 2020–2025

    52.5 °F

  • Average High 2020–2025

    61.9 °F
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