Greenville Weather Forecast

    • 56
    • 76

    Increasing Clouds

    • 62
    • 74

    Rain Showers

    • 54
    • 73

    Rain Showers

    • 53
    • 68

    Chance Rain Showers

    • 52
    • 65

    Rain Showers Likely

    • 52
    • 64

    Rain Showers Likely

Today 18 Sep Mercer

Mostly sunny. Near steady temperature in the lower 70s. North Winds 5 to 10 Mph.

Tonight 18 Sep Mercer

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

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Greenville Temperature Statistics

September Temperature

Port Meadville Airport (17.4 miles)

  • Lowest 7 September, 2026

    52 °F

  • Average September

    68.5 °F

  • Highest 2 September, 2026

    87.1 °F

Climate (2021–2026)

Port Meadville Airport (17.4 miles)

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

  • Average Low 2021–2026

    42.7 °F

  • Average 2021–2026

    50.9 °F

  • Average High 2021–2026

    59.2 °F
Get WillyWeather+ to remove ads