Ottawa Weather Forecast

    • 40
    • 53

    Slight Chance Rain Showers

    • 42
    • 53

    Rain Showers

    • 34
    • 54

    Chance Rain Showers

    • 33
    • 51

    Slight Chance Rain/Snow

    • 24
    • 44

    Slight Chance Rain/Snow

    • 32
    • 48

    Mostly Sunny

Today 3 Apr La Salle

Partly cloudy late in the Morning, then becoming mostly cloudy. Breezy. Highs in the mid 50s. West Winds 15 to 20 Mph with Gusts up to 30 Mph, Diminishing to 10 to 15 Mph in the afternoon.

Tonight 3 Apr La Salle

Mostly cloudy. A slight chance of Showers after midnight. Lows in the lower 40s. Northeast Winds 5 to 10 Mph. Chance of precipitation 20 percent.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Ottawa Temperature Statistics

April Temperature

Illinois Valley Regional Airport (15.5 miles)

  • Lowest 1 April, 2025

    28.4 °F

  • Average April

    40.5 °F

  • Highest 1 April, 2025

    47.3 °F

Climate (2020–Present)

Illinois Valley Regional Airport (15.5 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2020–2025

    43.1 °F

  • Average 2020–2025

    52.5 °F

  • Average High 2020–2025

    61.9 °F
Get WillyWeather+ to remove ads