Mendota Weather Forecast

    • 62
    • 80

    Rain Showers

    • 65
    • 74

    Rain Showers

    • 63
    • 80

    Chance Rain Showers

    • 65
    • 79

    Rain Showers Likely

    • 62
    • 82

    Chance Rain Showers

Today 15 Sep La Salle

Mostly cloudy late in the Morning, then becoming partly cloudy. Isolated Thunderstorms in the late morning and early afternoon. Scattered Showers. Scattered Thunderstorms late. Highs in the lower 80s. Southwest Winds 5 to 10 Mph, becoming west in the afternoon. Chance of precipitation 50 percent.

Tonight 15 Sep La Salle

Mostly cloudy. A chance of Thunderstorms in the evening. Showers likely. A slight chance of Thunderstorms after midnight. Lows in the mid 60s. North Winds 5 to 10 Mph. Chance of precipitation 70 percent.

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Mendota Temperature Statistics

September Temperature

Illinois Valley Regional Airport (13 miles)

  • Lowest 13 September, 2026

    51.8 °F

  • Average September

    75.6 °F

  • Highest 1 September, 2026

    93.2 °F

Climate (2021–2026)

Illinois Valley Regional Airport (13 miles)

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  • Average Low 2021–2026

    43.3 °F

  • Average 2021–2026

    52.9 °F

  • Average High 2021–2026

    62.6 °F
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