Martinsburg Weather Forecast

    • 59
    • 85

    Becoming Sunny

    • 59
    • 87

    Partly Sunny

    • 62
    • 87

    Mostly Sunny

    • 63
    • 88

    Mostly Cloudy

    • 60
    • 83

    Chance Rain Showers

    • 57
    • 82

    Chance Rain Showers

Today 25 May Keokuk

Mostly sunny. Highs in the mid 80s. South Winds 10 to 15 Mph with Gusts up to 25 Mph.

Tonight 25 May Keokuk

Mostly clear. Lows in the upper 50s. South Winds around 5 Mph.

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  • Temperature Real-Time

Martinsburg Temperature Statistics

May Temperature

Ottumwa Regional Airport (11.2 miles)

  • Lowest 1 May, 2026

    34.6 °F

  • Average May

    60 °F

  • Highest 15 May, 2026

    87.7 °F

Climate (2021–Present)

Ottumwa Regional Airport (11.2 miles)

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  • Average Low 2021–2026

    42.1 °F

  • Average 2021–2026

    52.7 °F

  • Average High 2021–2026

    63.4 °F
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