Arrowsmith Weather Forecast

    • 59
    • 78

    Thunderstorms

    • 57
    • 75

    Partly Sunny

    • 60
    • 80

    Rain Showers Likely

    • 51
    • 75

    Rain Showers Likely

    • 47
    • 72

    Partly Sunny

    • 53
    • 74

    Chance Rain Showers

    • 50
    • 73

    Rain Showers Likely

Today 21 Apr McLean

Sunny, breezy and not as cool. Near steady temperature in the mid 70s. Southwest Winds 20 to 25 Mph with Gusts up to 35 Mph.

Tonight 21 Apr McLean

Mostly cloudy this Evening, then becoming partly cloudy. Isolated Thunderstorms this evening. Isolated Showers. Not as cool with Lows in the upper 50s. Southwest Winds 15 to 20 Mph with Gusts up to 30 Mph. Chance of rain 20 percent.

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Arrowsmith Temperature Statistics

April Temperature

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

  • Lowest 7 April, 2026

    30.9 °F

  • Average April

    55.9 °F

  • Highest 13 April, 2026

    82.9 °F

Climate (2021–Present)

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

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  • Average Low 2021–2026

    43.7 °F

  • Average 2021–2026

    53.1 °F

  • Average High 2021–2026

    62.6 °F
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