Greenville Weather Forecast

    • 56
    • 71

    Mostly Cloudy

    • 55
    • 68

    Mostly Cloudy

    • 56
    • 74

    Partly Sunny

    • 59
    • 76

    Partly Sunny

    • 59
    • 79

    Chance Rain Showers

    • 48
    • 68

    Chance Rain Showers

    • 48
    • 66

    Slight Chance Rain Showers

Today 27 Sep Mercer

Partly sunny. A chance of Showers in the afternoon. Highs in the mid 60s. Chance of rain 40 percent.

Tonight 27 Sep Mercer

Mostly cloudy. Lows in the mid 50s. North Winds 10 to 15 Mph.

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Greenville Temperature Statistics

September Temperature

Port Meadville Airport (17.4 miles)

  • Lowest 25 September, 2026

    41 °F

  • Average September

    65.5 °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

    59.2 °F
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