Johnston Weather Forecast

    • 54
    • 72

    Chance Thunderstorms

    • 54
    • 80

    Chance Rain Showers

    • 38
    • 67

    Rain Showers

    • 30
    • 46

    Chance Rain

    • 28
    • 46

    Mostly Cloudy

    • 44
    • 52

    Rain

    • 39
    • 67

    Chance Rain

Today 27 Mar Polk

Mostly sunny. Highs in the upper 60s. Southeast Winds 5 to 10 Mph.

Tonight 27 Mar Polk

Partly cloudy with a slight chance of Showers and Thunderstorms. Lows in the mid 50s. Southeast Winds 10 to 15 Mph with Gusts up to 25 Mph. Chance of rain 20 percent.

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  • Temperature Real-Time

Johnston Temperature Statistics

March Temperature

Ankeny Regional Airport (6.8 miles)

  • Lowest 2 March, 2025

    12.2 °F

  • Average March

    43.9 °F

  • Highest 14 March, 2025

    80.6 °F

Climate (2020–Present)

Ankeny Regional Airport (6.8 miles)

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  • Average Low 2020–2025

    40.9 °F

  • Average 2020–2025

    51.6 °F

  • Average High 2020–2025

    61.6 °F
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