Greenville Weather Forecast
- 54
- 75
Increasing Clouds
- 63
- 76
Chance Rain Showers
- 64
- 78
Chance Rain Showers
- 49
- 72
Rain Showers
- 49
- 68
Mostly Cloudy
- 46
- 69
Slight Chance Rain Showers
- 40
- 62
Partly Sunny
Today 29 Sep Mercer
Mostly sunny. Highs in the lower 60s.
Tonight 29 Sep Mercer
Mainly clear. Patchy fog after midnight. Lows in the mid 50s. South Winds around 5 Mph.
Greenville Temperature Statistics
September Temperature
Port Meadville Airport (17.4 miles)
Lowest 25 September, 2026
41 °FAverage September
64.9 °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