Greenville Weather Forecast

    • 56
    • 78

    Chance Rain Showers

    • 61
    • 81

    Mostly Sunny

    • 59
    • 81

    Rain Showers Likely

    • 55
    • 76

    Chance Rain Showers

    • 54
    • 76

    Partly Sunny

    • 58
    • 79

    Partly Sunny

Today 20 Aug Mercer

Considerable cloudiness in the Morning, then becoming partly sunny. A chance of Showers. A slight chance of Thunderstorms in the afternoon. Humid with Highs in the upper 70s. East Winds 5 to 10 Mph. Chance of rain 50 percent.

Tonight 20 Aug Mercer

Mainly clear. Lows in the upper 50s. Northeast Winds 5 to 10 Mph.

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Greenville Temperature Statistics

August Temperature

Port Meadville Airport (17.4 miles)

  • Lowest 4 August, 2026

    53.1 °F

  • Average August

    71.2 °F

  • Highest 6 August, 2026

    82.9 °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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