St. Pat's Weather Forecast

    • 66
    • 80

    Rain Showers

    • 65
    • 77

    Mostly Cloudy

    • 67
    • 84

    Rain Showers Likely

    • 61
    • 75

    Chance Thunderstorms

    • 59
    • 72

    Chance Rain Showers

    • 59
    • 70

    Chance Rain Showers

Today 17 Sep Northern Will

Mostly cloudy. Patchy fog early in the morning. Showers and a slight chance of Thunderstorms early in the Morning, then a slight chance of Showers late in the morning. Humid. Highs in the upper 70s. Southwest Winds around 5 Mph, becoming north in the afternoon. Chance of precipitation 80 percent.

Tonight 17 Sep Northern Will

Mostly cloudy. Lows in the mid 60s. Northeast Winds around 5 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

St. Pat's Temperature Statistics

September Temperature

Joliet Regional Airport (3.7 miles)

  • Lowest 14 September, 2026

    50 °F

  • Average September

    75.7 °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

    43.6 °F

  • Average 2021–2026

    53.8 °F

  • Average High 2021–2026

    63.4 °F
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