Arrowsmith Weather Forecast

    • 75
    • 91

    Slight Chance Thunderstorms

    • 73
    • 91

    Thunderstorms Likely

    • 71
    • 84

    Rain Showers Likely

    • 72
    • 85

    Thunderstorms Likely

    • 72
    • 89

    Mostly Sunny

    • 73
    • 90

    Slight Chance Thunderstorms

Today 23 Jul McLean

Sunny with a slight chance of Showers and Thunderstorms. Highs in the lower 90s. South Winds 5 to 10 Mph. Chance of rain 20 percent. Heat index Values up to 109 this afternoon.

Tonight 23 Jul McLean

Mostly clear. Humid with Lows in the mid 70s. South Winds 5 to 10 Mph.

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Arrowsmith Temperature Statistics

July Temperature

Bloomington/Normal, Central Illinois Regional Airport at Bloomington-Normal (14.9 miles)

  • Lowest 18 July, 2025

    64 °F

  • Average July

    76.6 °F

  • Highest 4 July, 2025

    91 °F

Climate (2020–Present)

Bloomington/Normal, Central Illinois Regional Airport at Bloomington-Normal (14.9 miles)

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  • Average Low 2020–2025

    43.5 °F

  • Average 2020–2025

    52.7 °F

  • Average High 2020–2025

    62 °F
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