Glenn Weather Forecast

    • 28
    • 45

    Decreasing Clouds

    • 40
    • 55

    Mostly Sunny

    • 37
    • 61

    Mostly Cloudy

    • 33
    • 51

    Slight Chance Rain Showers

    • 32
    • 48

    Chance Rain Showers

    • 32
    • 49

    Chance Rain/Snow

Today 8 Feb Jackson

Partly sunny. Highs in the mid 40s. Southeast Winds 5 to 10 Mph.

Tonight 8 Feb Jackson

Mostly clear in the Evening, then becoming partly cloudy. Lows in the upper 20s. East Winds around 5 Mph.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Glenn Temperature Statistics

February Temperature

Southern Illinois Airport (18 miles)

  • Lowest 1 February, 2026

    0.6 °F

  • Average February

    25.6 °F

  • Highest 2 February, 2026

    43.6 °F

Climate (2021–Present)

Southern Illinois Airport (18 miles)

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

  • Average Low 2021–2026

    47.8 °F

  • Average 2021–2026

    58.2 °F

  • Average High 2021–2026

    68.7 °F
Get WillyWeather+ to remove ads