Greenville Weather Forecast

    • 59
    • 79

    Chance Thunderstorms

    • 55
    • 78

    Chance Rain Showers

    • 59
    • 81

    Mostly Sunny

    • 59
    • 81

    Rain Showers Likely

    • 55
    • 76

    Chance Thunderstorms

    • 55
    • 76

    Partly Sunny

Today 19 Aug Mercer

Mostly sunny this Morning, then partly sunny with a chance of Showers and Thunderstorms this afternoon. Highs in the upper 70s. Southwest Winds 5 to 10 Mph, becoming west this afternoon. Chance of rain 40 percent.

Tonight 19 Aug Mercer

Mostly cloudy. Patchy fog. A chance of Showers after midnight. Lows in the upper 50s. North Winds 5 to 10 Mph, becoming northeast after midnight. Chance of rain 30 percent.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

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)

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

  • Average Low 2021–2026

    42.7 °F

  • Average 2021–2026

    50.9 °F

  • Average High 2021–2026

    59.3 °F
Get WillyWeather+ to remove ads