Forsythe Woods County Forest Preserve Weather Forecast

    • 65
    • 88

    Becoming Sunny

    • 61
    • 83

    Mostly Sunny

    • 63
    • 83

    Partly Sunny

    • 72
    • 90

    Slight Chance Thunderstorms

    • 67
    • 92

    Chance Rain Showers

    • 61
    • 83

    Partly Sunny

Today 5 Sep Southern Will

Mostly sunny. Patchy fog early in the morning. Humid with Highs in the upper 80s. Northeast Winds 5 to 10 Mph. Heat index Values up to 100.

Tonight 5 Sep Southern Will

Partly cloudy in the Evening, then becoming mostly clear. Lows in the mid 60s. Northeast Winds 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Forsythe Woods County Forest Preserve Temperature Statistics

September Temperature

Joliet Regional Airport (14.9 miles)

  • Lowest 2 September, 2026

    72.9 °F

  • Average September

    83.7 °F

  • Highest 2 September, 2026

    95.9 °F

Climate (2021–2026)

Joliet Regional Airport (14.9 miles)

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  • Average Low 2021–2026

    43.6 °F

  • Average 2021–2026

    53.8 °F

  • Average High 2021–2026

    63.4 °F
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