Greenville Weather Forecast
- 64
- 79
Rain Showers
- 67
- 82
Thunderstorms
- 61
- 80
Rain Showers Likely
- 57
- 76
Partly Sunny
- 64
- 79
Rain Showers Likely
- 59
- 77
Chance Rain Showers
Today 15 Sep Mercer
Mostly sunny. Near steady temperature in the upper 70s. South Winds 10 to 15 Mph.
Tonight 15 Sep Mercer
Mainly clear. Isolated Showers after midnight. Warm with Lows in the mid 60s. South Winds 5 to 10 Mph. Chance of rain 20 percent.
Greenville Temperature Statistics
September Temperature
Port Meadville Airport (17.4 miles)
Lowest 7 September, 2026
52 °FAverage September
69.3 °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
59.3 °F