Merna Weather Forecast

    • 53
    • 72

    Mostly Cloudy

    • 55
    • 75

    Partly Sunny

    • 60
    • 77

    Rain Showers

    • 47
    • 76

    Rain Showers

    • 39
    • 60

    Slight Chance Rain Showers

    • 46
    • 67

    Mostly Sunny

    • 43
    • 68

    Slight Chance Rain Showers

Today 15 Oct McLean

Mostly cloudy with scattered Showers. Near steady temperature in the lower 70s. Northeast Winds 5 to 10 Mph. Chance of rain 30 percent.

Tonight 15 Oct McLean

Mostly cloudy. Isolated Showers this evening. Lows in the mid 50s. East Winds 5 to 10 Mph. Chance of rain 20 percent.

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Merna Temperature Statistics

October Temperature

Bloomington/Normal, Central Illinois Regional Airport at Bloomington-Normal (5 miles)

  • Lowest 9 October, 2025

    39.9 °F

  • Average October

    64.7 °F

  • Highest 3 October, 2025

    88 °F

Climate (2020–Present)

Bloomington/Normal, Central Illinois Regional Airport at Bloomington-Normal (5 miles)

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  • Average Low 2020–2025

    43.7 °F

  • Average 2020–2025

    52.9 °F

  • Average High 2020–2025

    62.2 °F
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