Greenville Weather Forecast

    • 71
    • 90

    Chance Thunderstorms

    • 69
    • 87

    Rain Showers Likely

    • 61
    • 82

    Chance Rain Showers

    • 55
    • 79

    Mostly Sunny

    • 56
    • 78

    Partly Sunny

    • 59
    • 79

    Mostly Cloudy

Today 2 Sep Mercer

Partly cloudy. Isolated Showers and Thunderstorms Early, then scattered Showers and Thunderstorms. Some Thunderstorms may be severe. Some Thunderstorms may be severe. Unseasonably warm with Highs in the upper 80s. Southwest Winds 5 to 10 Mph. Chance of rain 40 percent. Heat index Values in the upper 90s.

Tonight 2 Sep Mercer

Mostly cloudy with a chance of Showers. A chance of Thunderstorms. Some Thunderstorms may be severe in the evening. Warm with Lows in the lower 70s. Southwest Winds 5 to 10 Mph. Chance of rain 50 percent.

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Greenville Temperature Statistics

September Temperature

Port Meadville Airport (17.4 miles)

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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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