Greenville Weather Forecast
- 56
- 76
Increasing Clouds
- 62
- 74
Rain Showers
- 54
- 73
Rain Showers
- 53
- 68
Chance Rain Showers
- 52
- 65
Rain Showers Likely
- 52
- 64
Rain Showers Likely
Today 18 Sep Mercer
Mostly sunny. Near steady temperature in the lower 70s. North Winds 5 to 10 Mph.
Tonight 18 Sep Mercer
Partly cloudy. Lows in the mid 50s. Northeast Winds 5 to 10 Mph.
Greenville Temperature Statistics
September Temperature
Port Meadville Airport (17.4 miles)
Lowest 7 September, 2026
52 °FAverage September
68.5 °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