Greenville Weather Forecast

    • 65
    • 80

    Rain Showers

    • 54
    • 82

    Rain Showers Likely

    • 50
    • 69

    Mostly Sunny

    • 62
    • 79

    Chance Rain Showers

    • 65
    • 83

    Chance Rain Showers

    • 62
    • 84

    Rain Showers Likely

    • 56
    • 78

    Chance Rain Showers

Today 12 Sep Mercer

Showers with a chance of Thunderstorms. Some Thunderstorms may produce heavy rainfall. Near steady temperature in the mid 70s. Southwest Winds 5 to 10 Mph. Chance of rain 90 percent.

Tonight 12 Sep Mercer

Considerable cloudiness. Showers with a chance of Thunderstorms this Evening, then a chance of Showers with a slight chance of Thunderstorms after midnight. Patchy fog. Some Thunderstorms may produce heavy rainfall this evening. Some Thunderstorms may produce heavy rainfall after midnight. Warm with Lows in the mid 60s. South Winds around 5 Mph. Chance of rain 90 percent.

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Greenville Temperature Statistics

September Temperature

Port Meadville Airport (17.4 miles)

  • Lowest 7 September, 2026

    52 °F

  • Average September

    69.9 °F

  • Highest 2 September, 2026

    87.1 °F

Climate (2021–2026)

Port Meadville Airport (17.4 miles)

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  • Average Low 2021–2026

    42.7 °F

  • Average 2021–2026

    50.9 °F

  • Average High 2021–2026

    59.3 °F
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