Greenville Weather Forecast

    • 67
    • 85

    Rain Showers

    • 55
    • 77

    Mostly Cloudy

    • 56
    • 76

    Mostly Sunny

    • 65
    • 81

    Chance Rain Showers

    • 62
    • 81

    Slight Chance Rain Showers

    • 67
    • 81

    Partly Sunny

Today 9 Sep Mercer

Partly sunny. A chance of Showers and Thunderstorms in the afternoon. Unseasonably warm. Humid with Highs in the mid 80s. Southwest Winds 10 to 15 Mph with Gusts up to 25 Mph. Chance of rain 50 percent.

Tonight 9 Sep Mercer

A chance of Thunderstorms. Showers, mainly in the evening. Warm with Lows in the upper 60s. West Winds 10 to 15 Mph. Chance of rain near 100 percent.

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Greenville Temperature Statistics

September Temperature

Port Meadville Airport (17.4 miles)

  • Lowest 6 September, 2026

    54 °F

  • Average September

    70.6 °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

    59.2 °F
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