Greenville Weather Forecast
- 54
- 78
Mostly Sunny
- 64
- 82
Partly Sunny
- 67
- 85
Rain Showers
- 56
- 76
Slight Chance Thunderstorms
- 55
- 74
Partly Sunny
- 62
- 80
Slight Chance Thunderstorms
Today 7 Sep Mercer
Mostly sunny. Highs in the upper 70s. East Winds around 5 Mph.
Tonight 7 Sep Mercer
Mainly clear. Lows in the mid 50s. East Winds around 5 Mph.
Greenville Temperature Statistics
September Temperature
Port Meadville Airport (17.4 miles)
Lowest 5 September, 2026
57.9 °FAverage September
71.9 °FHighest 2 September, 2026
87.1 °F
Climate (2021–2026)
Port Meadville Airport (17.4 miles)
Average Low 2021–2026
42.7 °FAverage 2021–2026
50.9 °FAverage High 2021–2026
59.2 °F