Iowa Speedway Weather Forecast

    • 39
    • 72

    Chance Rain

    • 37
    • 45

    Rain

    • 35
    • 56

    Rain

    • 40
    • 62

    Rain Likely

    • 31
    • 50

    Chance Rain

    • 31
    • 52

    Mostly Sunny

Today 31 Mar Jasper

Partly sunny in the Morning, then becoming mostly cloudy. A slight chance of rain and Thunderstorms. Cooler with Highs in the lower 70s. Temperature falling into the lower 60s in the afternoon. West Winds 15 to 20 Mph, becoming north in the afternoon. Chance of rain 20 percent.

Tonight 31 Mar Jasper

Mostly cloudy. A slight chance of rain in the Evening, then a chance of rain with a slight chance of Thunderstorms after midnight. Much cooler with Lows in the upper 30s. Northeast Winds 15 to 20 Mph. Chance of rain 50 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Iowa Speedway Temperature Statistics

March Temperature

Newton Municipal Airport - Earl Johnson Field (0 miles)

  • Lowest 16 March, 2026

    8.6 °F

  • Average March

    44.6 °F

  • Highest 21 March, 2026

    91.4 °F

Climate (2021–Present)

Newton Municipal Airport - Earl Johnson Field (0 miles)

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  • Average Low 2021–2026

    41.6 °F

  • Average 2021–2026

    51.4 °F

  • Average High 2021–2026

    61.5 °F
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