Greenville Weather Forecast

    • 48
    • 69

    Increasing Clouds

    • 64
    • 80

    Chance Rain Showers

    • 67
    • 82

    Chance Thunderstorms

    • 65
    • 84

    Rain Showers Likely

    • 60
    • 79

    Slight Chance Rain Showers

    • 60
    • 78

    Rain Showers Likely

Today 14 Sep Mercer

Mostly sunny. Highs in the upper 60s. North Winds 5 to 10 Mph.

Tonight 14 Sep Mercer

Partly cloudy. Lows in the upper 40s. Northeast Winds around 5 Mph, becoming southeast around 5 Mph after midnight.

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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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