Greenville Weather Forecast

    • 54
    • 75

    Increasing Clouds

    • 63
    • 76

    Chance Rain Showers

    • 64
    • 78

    Chance Rain Showers

    • 49
    • 72

    Rain Showers

    • 49
    • 68

    Mostly Cloudy

    • 46
    • 69

    Slight Chance Rain Showers

    • 40
    • 62

    Partly Sunny

Today 29 Sep Mercer

Mostly sunny. Highs in the lower 60s.

Tonight 29 Sep Mercer

Mainly clear. Patchy fog after midnight. Lows in the mid 50s. South Winds around 5 Mph.

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

    64.9 °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