Arrowsmith Weather Forecast

    • 48
    • 74

    Sunny

    • 45
    • 74

    Sunny

    • 47
    • 73

    Mostly Sunny

    • 50
    • 74

    Partly Sunny

    • 50
    • 76

    Mostly Cloudy

    • 46
    • 70

    Mostly Cloudy

Today 21 Oct McLean

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

Tonight 21 Oct McLean

Mostly clear. Lows in the upper 40s. Light and variable Winds.

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Arrowsmith Temperature Statistics

October Temperature

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

  • Lowest 17 October, 2026

    36 °F

  • Average October

    62.6 °F

  • Highest 12 October, 2026

    88 °F

Climate (2021–2026)

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