Greenville Weather Forecast

    • 67
    • 87

    Severe Tstms

    • 64
    • 82

    Rain Showers Likely

    • 54
    • 79

    Partly Sunny

    • 55
    • 77

    Mostly Sunny

    • 57
    • 78

    Partly Sunny

    • 63
    • 81

    Mostly Cloudy

    • 67
    • 84

    Chance Thunderstorms

Today 3 Sep Mercer

Partly cloudy with a chance of Showers and Thunderstorms. Some Thunderstorms may be severe with heavy rainfall. Unseasonably warm. Near steady temperature in the mid 80s. West Winds 5 to 10 Mph. Chance of rain 50 percent.

Tonight 3 Sep Mercer

Showers and Thunderstorms likely this Evening, then Showers likely with a chance of Thunderstorms after midnight. Some Thunderstorms may be severe with gusty Winds and heavy rainfall this evening. Some Thunderstorms may produce gusty Winds after midnight. Warm with Lows in the upper 60s. West Winds 5 to 10 Mph. Chance of rain 70 percent.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Greenville Temperature Statistics

September Temperature

Port Meadville Airport (17.4 miles)

  • Lowest 1 September, 2026

    71.1 °F

  • Average September

    76.3 °F

  • Highest 1 September, 2026

    84.9 °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

    42.6 °F

  • Average 2021–2026

    50.9 °F

  • Average High 2021–2026

    59.2 °F
Get WillyWeather+ to remove ads