Johnston Weather Forecast

    • 72
    • 90

    Partly Sunny

    • 74
    • 92

    Mostly Sunny

    • 69
    • 93

    Mostly Sunny

    • 72
    • 91

    Mostly Sunny

    • 71
    • 95

    Mostly Sunny

    • 66
    • 88

    Mostly Sunny

Today 16 Jul Polk

Sunny with a 20 percent chance of Showers. Near steady temperature around 90. Southwest Winds around 5 Mph.

Tonight 16 Jul Polk

Partly cloudy. A slight chance of Showers in the evening. Humid with Lows in the lower 70s. South Winds around 5 Mph. Chance of rain 20 percent.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Johnston Temperature Statistics

July Temperature

Ankeny Regional Airport (6.8 miles)

  • Lowest 12 July, 2026

    60.8 °F

  • Average July

    77.7 °F

  • Highest 2 July, 2026

    93.2 °F

Climate (2021–2026)

Ankeny Regional Airport (6.8 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2021–2026

    41.4 °F

  • Average 2021–2026

    52.1 °F

  • Average High 2021–2026

    62.4 °F
Get WillyWeather+ to remove ads