Greenville Weather Forecast

    • 34
    • 64

    Mostly Sunny

    • 37
    • 64

    Mostly Sunny

    • 31
    • 61

    Sunny

    • 34
    • 63

    Mostly Sunny

    • 40
    • 66

    Partly Sunny

    • 43
    • 67

    Partly Sunny

Today 21 Oct Mercer

Areas of frost with patchy fog in the morning. Sunny. Highs in the lower 60s. East Winds around 5 Mph, becoming north in the afternoon.

Tonight 21 Oct Mercer

Mainly clear. Patchy fog after midnight. Lows in the mid 30s. North Winds around 5 Mph.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Greenville Temperature Statistics

October Temperature

Port Meadville Airport (17.4 miles)

  • Lowest 18 October, 2026

    34 °F

  • Average October

    56.6 °F

  • Highest 13 October, 2026

    81 °F

Climate (2021–2026)

Port Meadville Airport (17.4 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2021–2026

    42.6 °F

  • Average 2021–2026

    50.8 °F

  • Average High 2021–2026

    59.2 °F
Get WillyWeather+ to remove ads