Piasa Weather Forecast

    • 48
    • 74

    Mostly Sunny

    • 46
    • 75

    Sunny

    • 46
    • 75

    Mostly Sunny

    • 49
    • 76

    Partly Sunny

    • 50
    • 78

    Mostly Cloudy

    • 47
    • 73

    Mostly Cloudy

Today 21 Oct Macoupin

Sunny. Highs in the mid 70s. South Winds around 5 Mph, becoming west in the afternoon.

Tonight 21 Oct Macoupin

Mostly clear. Lows in the upper 40s. Northeast Winds around 5 Mph.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Piasa Temperature Statistics

October Temperature

St. Louis Regional Airport (16.2 miles)

  • Lowest 18 October, 2026

    36 °F

  • Average October

    61.6 °F

  • Highest 12 October, 2026

    91.4 °F

Climate (2021–2026)

St. Louis Regional Airport (16.2 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2021–2026

    46.6 °F

  • Average 2021–2026

    54.5 °F

  • Average High 2021–2026

    66.7 °F
Get WillyWeather+ to remove ads