Greenville Weather Forecast

    • 55
    • 66

    Dense Fog

    • 54
    • 75

    Areas Fog

    • 61
    • 76

    Mostly Cloudy

    • 58
    • 80

    Rain Showers Likely

    • 49
    • 68

    Rain Showers Likely

    • 52
    • 69

    Chance Rain Showers

    • 48
    • 69

    Chance Rain Showers

Today 28 Sep Mercer

Partly sunny in the Morning, then becoming partly cloudy. Highs in the lower 60s.

Tonight 28 Sep Mercer

Mostly cloudy. Patchy fog. Lows in the mid 50s. North Winds around 5 Mph this Evening, becoming light and variable.

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  • Temperature Forecast NOAA

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Greenville Temperature Statistics

September Temperature

Port Meadville Airport (17.4 miles)

  • Lowest 25 September, 2026

    41 °F

  • Average September

    65.2 °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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