Greenville Weather Forecast

    • 47
    • 67

    Partly Sunny

    • 44
    • 68

    Becoming Sunny

    • 48
    • 69

    Mostly Sunny

    • 49
    • 71

    Mostly Sunny

    • 49
    • 69

    Partly Sunny

    • 49
    • 70

    Partly Sunny

    • 55
    • 72

    Partly Sunny

Today 23 Sep Mercer

Partly cloudy in the Morning, then partly sunny with a chance of Showers in the afternoon. Highs in the mid 70s. Chance of rain 30 percent.

Tonight 23 Sep Mercer

Mainly clear. Lows in the upper 40s. East Winds 5 to 10 Mph.

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Greenville Temperature Statistics

September Temperature

Port Meadville Airport (17.4 miles)

  • Lowest 7 September, 2026

    52 °F

  • Average September

    67.3 °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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