Dayton Weather Forecast

    • 43
    • 60

    Rain Showers

    • 46
    • 67

    Partly Sunny

    • 47
    • 68

    Partly Sunny

    • 46
    • 67

    Slight Chance Rain Showers

    • 51
    • 69

    Chance Rain Showers

    • 50
    • 68

    Chance Rain Showers

    • 51
    • 71

    Partly Sunny

Today 22 May La Salle

Mostly cloudy. Isolated Showers late in the Morning, then scattered Showers in the afternoon. Highs around 60. Northwest Winds 10 to 15 Mph. Chance of precipitation 40 percent.

Tonight 22 May La Salle

Partly cloudy in the evening then clearing. A slight chance of Showers early in the evening. Lows in the lower 40s. Northwest Winds 5 to 10 Mph, becoming west after midnight. Chance of precipitation 20 percent.

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Dayton Temperature Statistics

May Temperature

Illinois Valley Regional Airport (18 miles)

  • Lowest 9 May, 2025

    38.3 °F

  • Average May

    62.5 °F

  • Highest 15 May, 2025

    97.5 °F

Climate (2020–Present)

Illinois Valley Regional Airport (18 miles)

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  • Average Low 2020–2025

    43.2 °F

  • Average 2020–2025

    52.6 °F

  • Average High 2020–2025

    62.1 °F
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