Tiskilwa Weather Forecast

    • 55
    • 65

    Chance Rain Showers

    • 50
    • 66

    Partly Sunny

    • 51
    • 70

    Partly Sunny

    • 52
    • 70

    Mostly Cloudy

    • 51
    • 71

    Mostly Cloudy

    • 53
    • 71

    Mostly Cloudy

Today 21 Sep Bureau

Cloudy. A slight chance of Showers late this Morning, then a chance of Showers this afternoon. Highs in the mid 60s. Northeast Winds 10 to 15 Mph with Gusts up to 25 Mph. Chance of rain 30 percent.

Tonight 21 Sep Bureau

Mostly cloudy with a 20 percent chance of Showers. Lows in the mid 50s. Northeast Winds 10 to 15 Mph with Gusts up to 25 Mph.

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Tiskilwa Temperature Statistics

September Temperature

Illinois Valley Regional Airport (18.6 miles)

  • Lowest 14 September, 2026

    50 °F

  • Average September

    74 °F

  • Highest 1 September, 2026

    93.2 °F

Climate (2021–2026)

Illinois Valley Regional Airport (18.6 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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