Mercersville Weather Forecast

    • 57
    • 83

    Mostly Cloudy

    • 65
    • 77

    Slight Chance Rain Showers

    • 64
    • 81

    Rain Showers

    • 59
    • 73

    Rain Showers Likely

    • 53
    • 65

    Rain Showers Likely

    • 53
    • 60

    Chance Rain Showers

Today 18 Sep Washington

Mostly cloudy. Highs in the lower 80s. North Winds 5 to 10 Mph.

Tonight 18 Sep Washington

Partly cloudy. Lows in the upper 50s. Northeast Winds 5 to 10 Mph.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Mercersville Temperature Statistics

September Temperature

Eastern WV Regional Airport/Shepherd Field (13 miles)

  • Lowest 15 September, 2026

    46.9 °F

  • Average September

    74.6 °F

  • Highest 1 September, 2026

    94.6 °F

Climate (2021–2026)

Eastern WV Regional Airport/Shepherd Field (13 miles)

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

  • Average Low 2021–2026

    44.7 °F

  • Average 2021–2026

    55.3 °F

  • Average High 2021–2026

    65.9 °F
Get WillyWeather+ to remove ads