Greenville Weather Forecast

    • 47
    • 64

    Slight Chance Rain Showers

    • 49
    • 69

    Partly Sunny

    • 51
    • 70

    Rain Showers

    • 57
    • 68

    Rain Showers

    • 60
    • 78

    Rain Showers Likely

    • 60
    • 76

    Slight Chance Thunderstorms

Today 20 May Mercer

Considerable cloudiness with scattered Showers. Near steady temperature in the mid 50s. North Winds 5 to 10 Mph with Gusts up to 20 Mph. Chance of rain 50 percent.

Tonight 20 May Mercer

Considerable cloudiness. Lows in the upper 40s. North Winds 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Greenville Temperature Statistics

May Temperature

Port Meadville Airport (17.4 miles)

  • Lowest 2 May, 2026

    33.1 °F

  • Average May

    52.3 °F

  • Highest 18 May, 2026

    86 °F

Climate (2021–Present)

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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