Greenville Weather Forecast

    • 68
    • 89

    Rain Showers

    • 55
    • 78

    Mostly Cloudy

    • 56
    • 76

    Mostly Sunny

    • 65
    • 81

    Chance Rain Showers

    • 63
    • 81

    Mostly Cloudy

    • 67
    • 81

    Partly Sunny

Today 9 Sep Mercer

Partly cloudy Early, then becoming partly sunny. A slight chance of Showers and Thunderstorms. Unseasonably warm with Highs in the mid 80s. Southwest Winds 10 to 15 Mph with Gusts up to 25 Mph. Chance of rain 20 percent.

Tonight 9 Sep Mercer

Considerable cloudiness with a chance of Thunderstorms. Showers, mainly in the evening. Warm with Lows in the upper 60s. Southwest Winds 10 to 15 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

    69.6 °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

    42.6 °F

  • Average 2021–2026

    50.9 °F

  • Average High 2021–2026

    59.2 °F
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