Greenville Weather Forecast

    • 54
    • 68

    Decreasing Clouds

    • 54
    • 74

    Mostly Cloudy

    • 60
    • 77

    Partly Sunny

    • 58
    • 80

    Chance Rain Showers

    • 50
    • 70

    Chance Rain Showers

    • 52
    • 68

    Chance Rain Showers

Today 28 Sep Mercer

Cloudy. Highs in the upper 60s. North Winds 5 to 10 Mph.

Tonight 28 Sep Mercer

Mostly cloudy. Patchy fog in the Evening, then Areas of fog after midnight. Lows in the mid 50s. North Winds 5 to 10 Mph in the Evening, becoming light and variable.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Greenville Temperature Statistics

September Temperature

Port Meadville Airport (17.4 miles)

  • Lowest 25 September, 2026

    41 °F

  • Average September

    65.5 °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