Greenville Weather Forecast

    • 64
    • 81

    Rain Showers

    • 56
    • 79

    Partly Sunny

    • 55
    • 77

    Mostly Sunny

    • 57
    • 79

    Partly Sunny

    • 63
    • 80

    Mostly Cloudy

    • 67
    • 82

    Chance Rain Showers

Today 4 Sep Mercer

Patchy fog this morning. Mostly cloudy with a chance of Showers. A slight chance of Thunderstorms this Morning, then a chance of Thunderstorms this afternoon. Highs in the lower 80s. West Winds 5 to 10 Mph. Chance of rain 50 percent.

Tonight 4 Sep Mercer

Mostly cloudy with a chance of Showers and Thunderstorms. Warm with Lows in the mid 60s. Northwest Winds around 5 Mph in the Evening, becoming light and variable. Chance of rain 50 percent.

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Greenville Temperature Statistics

September Temperature

Port Meadville Airport (17.4 miles)

  • Lowest 1 September, 2026

    71.1 °F

  • Average September

    76.3 °F

  • Highest 1 September, 2026

    84.9 °F

Climate (2021–2026)

Port Meadville Airport (17.4 miles)

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  • Average Low 2021–2026

    42.6 °F

  • Average 2021–2026

    50.9 °F

  • Average High 2021–2026

    59.2 °F
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