Greenville Weather Forecast

    • 54
    • 82

    Rain Showers Likely

    • 50
    • 69

    Partly Sunny

    • 64
    • 80

    Rain Showers Likely

    • 64
    • 82

    Chance Thunderstorms

    • 64
    • 82

    Rain Showers Likely

    • 59
    • 79

    Chance Rain Showers

Today 13 Sep Mercer

Patchy fog this morning. Considerable cloudiness this Morning, then partly sunny with Showers likely with a chance of Thunderstorms this afternoon. Highs in the lower 80s. West Winds 5 to 10 Mph. Chance of rain 70 percent.

Tonight 13 Sep Mercer

Mostly cloudy. A chance of Showers and Thunderstorms in the Evening, then a slight chance of Showers after midnight. Lows in the mid 50s. Northwest Winds 5 to 10 Mph. Chance of rain 50 percent.

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Greenville Temperature Statistics

September Temperature

Port Meadville Airport (17.4 miles)

  • Lowest 7 September, 2026

    52 °F

  • Average September

    69.5 °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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