Greenville Weather Forecast

    • 68
    • 83

    Rain Showers Likely

    • 61
    • 81

    Rain Showers Likely

    • 55
    • 77

    Partly Sunny

    • 62
    • 76

    Rain Showers

    • 58
    • 75

    Chance Rain Showers

    • 59
    • 72

    Chance Rain Showers

    • 59
    • 73

    Chance Rain Showers

Today 16 Sep Mercer

Mostly cloudy in the Morning, then becoming partly sunny. A chance of Showers. Highs in the lower 70s. Chance of rain 40 percent.

Tonight 16 Sep Mercer

Showers likely. A chance of Thunderstorms, mainly this evening. Patchy fog. Warm with Lows in the upper 60s. North Winds around 5 Mph, becoming southeast after midnight. Chance of rain 70 percent.

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Greenville Temperature Statistics

September Temperature

Port Meadville Airport (17.4 miles)

  • Lowest 7 September, 2026

    52 °F

  • Average September

    68.6 °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

    59.2 °F
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