Iona Weather Forecast

    • 39
    • 65

    Decreasing Clouds

    • 44
    • 68

    Partly Sunny

    • 58
    • 86

    Breezy

    • 46
    • 76

    Breezy

    • 56
    • 79

    Breezy

    • 55
    • 87

    Breezy

Today 9 May Lyman

Partly sunny. Highs in the mid 60s. North Winds 15 to 20 Mph with Gusts up to 30 Mph.

Tonight 9 May Lyman

Partly cloudy in the Evening, then becoming mostly cloudy. Lows in the upper 30s. North Winds 15 to 20 Mph with Gusts up to 30 Mph, becoming west around 5 Mph after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Iona Temperature Statistics

May Temperature

Chamberlain, Chamberlain Municipal Airport (16.2 miles)

  • Lowest 6 May, 2026

    27.9 °F

  • Average May

    49.8 °F

  • Highest 2 May, 2026

    75.9 °F

Climate (2021–Present)

Chamberlain, Chamberlain Municipal Airport (16.2 miles)

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  • Average Low 2021–2026

    36.4 °F

  • Average 2021–2026

    47.8 °F

  • Average High 2021–2026

    59.7 °F
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