St. Pat's Weather Forecast

    • 66
    • 73

    Rain Showers

    • 58
    • 69

    Rain Showers Likely

    • 54
    • 65

    Chance Rain Showers

    • 54
    • 64

    Mostly Cloudy

    • 54
    • 67

    Mostly Cloudy

    • 55
    • 69

    Mostly Cloudy

Today 19 Sep Northern Will

Cloudy. A slight chance of Thunderstorms early in the afternoon. A chance of Showers. A chance of Thunderstorms late. Highs in the lower 70s. Southeast Winds around 5 Mph. Chance of precipitation 50 percent.

Tonight 19 Sep Northern Will

Showers with a chance of Thunderstorms. Some Thunderstorms may produce heavy rainfall. Humid. Near steady temperature in the upper 60s. East Winds around 5 Mph, becoming northwest after midnight. Chance of precipitation near 100 percent.

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St. Pat's Temperature Statistics

September Temperature

Joliet Regional Airport (3.7 miles)

  • Lowest 14 September, 2026

    50 °F

  • Average September

    75.4 °F

  • Highest 2 September, 2026

    95.9 °F

Climate (2021–2026)

Joliet Regional Airport (3.7 miles)

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  • Average Low 2021–2026

    43.7 °F

  • Average 2021–2026

    53.8 °F

  • Average High 2021–2026

    63.4 °F
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