Mercer Field Weather Forecast

    • 64
    • 87

    Chance Thunderstorms

    • 62
    • 85

    Chance Thunderstorms

    • 60
    • 80

    Rain Showers Likely

    • 58
    • 74

    Chance Thunderstorms

    • 57
    • 75

    Chance Thunderstorms

    • 59
    • 77

    Slight Chance Thunderstorms

Today 16 Sep Union

Partly sunny. A chance of Showers and Thunderstorms in the afternoon. Humid with Highs in the upper 80s. South Winds around 5 Mph. Chance of rain 30 percent.

Tonight 16 Sep Union

Mostly cloudy in the Evening, then becoming partly cloudy. A slight chance of Showers and Thunderstorms. Humid with Lows in the lower 60s. Southeast Winds around 5 Mph. Chance of rain 20 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Mercer Field Temperature Statistics

September Temperature

Creston Municipal Airport (5 miles)

  • Lowest 7 September, 2025

    41 °F

  • Average September

    65.4 °F

  • Highest 12 September, 2025

    96.8 °F

Climate (2020–Present)

Creston Municipal Airport (5 miles)

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  • Average Low 2020–2025

    41 °F

  • Average 2020–2025

    51.1 °F

  • Average High 2020–2025

    61.4 °F
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