Mercer Weather Forecast

    • 64
    • 87

    Chance Thunderstorms

    • 63
    • 83

    Rain Showers Likely

    • 60
    • 77

    Rain Showers Likely

    • 63
    • 80

    Chance Rain Showers

    • 62
    • 80

    Chance Thunderstorms

    • 58
    • 80

    Chance Rain Showers

Today 17 Sep Mercer

Mostly sunny early this Morning, then becoming partly sunny. A slight chance of Showers and Thunderstorms this morning. A chance of Showers and Thunderstorms this afternoon. Highs in the upper 80s. Southeast Winds around 5 Mph, becoming southwest around 5 Mph this afternoon. Chance of rain 40 percent.

Tonight 17 Sep Mercer

Mostly cloudy with a chance of Showers. A chance of Thunderstorms, mainly in the evening. Lows in the mid 60s. Southeast Winds around 5 Mph. Chance of rain 50 percent.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Mercer Temperature Statistics

September Temperature

Lamoni, Lamoni Municipal Airport (20.5 miles)

  • Lowest 7 September, 2025

    43 °F

  • Average September

    67.1 °F

  • Highest 12 September, 2025

    93.9 °F

Climate (2020–Present)

Lamoni, Lamoni Municipal Airport (20.5 miles)

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

  • Average Low 2020–2025

    43.2 °F

  • Average 2020–2025

    53.1 °F

  • Average High 2020–2025

    63.1 °F
Get WillyWeather+ to remove ads