Merna Weather Forecast

    • 75
    • 89

    Chance Thunderstorms

    • 73
    • 91

    Slight Chance Thunderstorms

    • 62
    • 86

    Mostly Sunny

    • 61
    • 84

    Mostly Sunny

    • 65
    • 85

    Slight Chance Thunderstorms

    • 65
    • 84

    Slight Chance Thunderstorms

Today 26 Jul McLean

Mostly cloudy this Morning, then becoming partly sunny. Patchy fog this morning. Warmer with Highs in the upper 80s. South Winds 5 to 10 Mph, becoming southwest this afternoon. Heat index Values up to 107 this afternoon.

Tonight 26 Jul McLean

Partly cloudy. A slight chance of Showers and Thunderstorms after midnight. Humid with Lows in the mid 70s. South Winds 5 to 10 Mph. Gusts up to 25 Mph after midnight. Chance of rain 20 percent.

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Merna Temperature Statistics

July Temperature

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

  • Lowest 23 July, 2026

    53.1 °F

  • Average July

    77 °F

  • Highest 2 July, 2026

    91 °F

Climate (2021–2026)

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

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  • Average Low 2021–2026

    43.8 °F

  • Average 2021–2026

    53.2 °F

  • Average High 2021–2026

    62.7 °F
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