Greenville Weather Forecast

    • 67
    • 83

    Chance Thunderstorms

    • 61
    • 80

    Rain Showers Likely

    • 55
    • 75

    Partly Sunny

    • 61
    • 74

    Rain Showers

    • 59
    • 74

    Chance Rain Showers

    • 59
    • 75

    Chance Thunderstorms

Today 16 Sep Mercer

Partly sunny. A slight chance of Showers in the Morning, then a chance of Showers and Thunderstorms in the afternoon. Humid with Highs in the lower 80s. South Winds around 5 Mph, becoming west in the afternoon. Chance of rain 50 percent.

Tonight 16 Sep Mercer

Mostly cloudy with a chance of Showers and Thunderstorms. Warm with Lows in the mid 60s. North Winds around 5 Mph, becoming southeast after midnight. Chance of rain 50 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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