Greenville Weather Forecast
- 61
- 80
Chance Rain Showers
- 56
- 77
Partly Sunny
- 63
- 72
Rain Showers
- 56
- 74
Chance Rain Showers
- 57
- 71
Chance Rain Showers
- 56
- 71
Chance Rain Showers
Today 17 Sep Mercer
Mostly cloudy with a chance of Showers with a slight chance of Thunderstorms. Highs around 80. Southwest Winds around 5 Mph, becoming northwest this afternoon. Chance of rain 50 percent.
Tonight 17 Sep Mercer
Mostly cloudy. Humid with Lows in the lower 60s. North Winds around 5 Mph.
Greenville Temperature Statistics
September Temperature
Port Meadville Airport (17.4 miles)
Lowest 7 September, 2026
52 °FAverage September
68.3 °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