Tiskilwa Weather Forecast

    • 64
    • 77

    Mostly Cloudy

    • 65
    • 82

    Rain Showers

    • 55
    • 73

    Rain Showers

    • 52
    • 66

    Chance Rain Showers

    • 50
    • 65

    Slight Chance Rain Showers

    • 50
    • 68

    Partly Sunny

Today 18 Sep Bureau

Mostly cloudy this Morning, then becoming partly sunny. A 20 percent chance of Showers. Not as warm with Highs in the mid 70s. East Winds 5 to 10 Mph.

Tonight 18 Sep Bureau

Partly cloudy in the Evening, then mostly cloudy with Showers likely with a chance of Thunderstorms after midnight. Lows in the mid 60s. Southeast Winds 10 to 15 Mph. Chance of rain 70 percent.

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Tiskilwa Temperature Statistics

September Temperature

Illinois Valley Regional Airport (18.6 miles)

  • Lowest 14 September, 2026

    50 °F

  • Average September

    74.7 °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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