Greenville Weather Forecast

    • 68
    • 87

    Slight Chance Thunderstorms

    • 57
    • 88

    Thunderstorms

    • 43
    • 65

    Chance Rain Showers

    • 48
    • 67

    Partly Sunny

    • 54
    • 69

    Rain Showers

    • 58
    • 72

    Rain Showers Likely

Today 18 May Mercer

Sunny. Unseasonably warm. Near steady temperature in the mid 80s. Southwest Winds 10 to 15 Mph with Gusts up to 25 Mph.

Tonight 18 May Mercer

Partly cloudy with a slight chance of Showers and Thunderstorms in the Evening, then mostly cloudy after midnight. Warm with Lows in the upper 60s. South Winds 5 to 10 Mph. Chance of rain 20 percent.

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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

    49.7 °F

  • Highest 4 May, 2026

    71.1 °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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