Greenville Weather Forecast

    • 61
    • 80

    Chance Rain Showers

    • 56
    • 77

    Partly Sunny

    • 63
    • 72

    Rain Showers

    • 56
    • 74

    Chance Rain Showers

    • 57
    • 71

    Chance Rain Showers

    • 56
    • 71

    Chance Rain Showers

Today 17 Sep Mercer

Mostly cloudy with a chance of Showers with a slight chance of Thunderstorms. Highs around 80. Southwest Winds around 5 Mph, becoming northwest this afternoon. Chance of rain 50 percent.

Tonight 17 Sep Mercer

Mostly cloudy. Humid with Lows in the lower 60s. 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

    68.3 °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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