Greenville Weather Forecast

    • 56
    • 78

    Becoming Sunny

    • 54
    • 78

    Partly Sunny

    • 55
    • 79

    Mostly Sunny

    • 65
    • 82

    Mostly Cloudy

    • 66
    • 87

    Rain Showers Likely

    • 56
    • 76

    Slight Chance Rain Showers

Today 5 Sep Mercer

Areas of fog this morning. Mostly cloudy with a slight chance of Showers this Morning, then partly cloudy this afternoon. Highs in the upper 70s. North Winds 5 to 10 Mph. Chance of rain 20 percent.

Tonight 5 Sep Mercer

Mainly clear. Lows in the mid 50s. Northeast Winds 5 to 10 Mph.

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Greenville Temperature Statistics

September Temperature

Port Meadville Airport (17.4 miles)

  • Lowest 3 September, 2026

    66.9 °F

  • Average September

    74 °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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