Greenville Weather Forecast
- 63
- 73
Rain Showers Likely
- 51
- 73
Rain Showers
- 51
- 68
Slight Chance Rain Showers
- 51
- 65
Rain Showers Likely
- 50
- 63
Chance Rain Showers
- 49
- 65
Slight Chance Rain Showers
- 49
- 69
Partly Sunny
Today 19 Sep Mercer
Mostly sunny. Highs around 70.
Tonight 19 Sep Mercer
Showers likely with a slight chance of Thunderstorms. Lows in the lower 60s. Southeast Winds around 5 Mph. Chance of rain 70 percent.
Greenville Temperature Statistics
September Temperature
Port Meadville Airport (17.4 miles)
Lowest 7 September, 2026
52 °FAverage September
68.7 °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