Greenville Weather Forecast

    • 61
    • 74

    Rain Showers

    • 50
    • 72

    Rain Showers

    • 49
    • 67

    Chance Rain Showers

    • 49
    • 63

    Rain Showers Likely

    • 49
    • 62

    Rain Showers Likely

    • 49
    • 65

    Slight Chance Rain Showers

Today 19 Sep Mercer

Mostly cloudy. Highs in the mid 70s. East Winds 5 to 10 Mph.

Tonight 19 Sep Mercer

Considerable cloudiness with a slight chance of Thunderstorms. A chance of Showers in the Evening, then Showers likely after midnight. Lows in the lower 60s. Southeast Winds 5 to 10 Mph. Chance of rain 70 percent.

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Greenville Temperature Statistics

September Temperature

Port Meadville Airport (17.4 miles)

  • Lowest 7 September, 2026

    52 °F

  • Average September

    68.7 °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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