Greenville Weather Forecast

    • 57
    • 78

    Decreasing Clouds

    • 58
    • 77

    Partly Sunny

    • 65
    • 80

    Rain Showers Likely

    • 59
    • 81

    Slight Chance Thunderstorms

    • 63
    • 79

    Partly Sunny

    • 62
    • 84

    Rain Showers Likely

Today 10 Sep Mercer

Mostly cloudy. Humid with Highs in the upper 70s. West Winds 5 to 10 Mph.

Tonight 10 Sep Mercer

Mostly cloudy. Lows in the upper 50s. North Winds around 5 Mph.

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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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