Greenville Weather Forecast

    • 63
    • 79

    Increasing Clouds

    • 66
    • 82

    Chance Rain Showers

    • 63
    • 83

    Rain Showers Likely

    • 58
    • 77

    Slight Chance Rain Showers

    • 64
    • 79

    Chance Thunderstorms

    • 59
    • 77

    Chance Rain Showers

Today 15 Sep Mercer

Mostly sunny. Highs in the upper 70s. South Winds 10 to 15 Mph.

Tonight 15 Sep Mercer

Mainly clear. A slight chance of Showers after midnight. Lows in the lower 60s. South Winds 5 to 10 Mph. Chance of rain 20 percent.

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Greenville Temperature Statistics

September Temperature

Port Meadville Airport (17.4 miles)

  • Lowest 7 September, 2026

    52 °F

  • Average September

    69.3 °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

    59.3 °F
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