Greenville Weather Forecast
- 54
- 77
Becoming Sunny
- 54
- 78
Partly Sunny
- 65
- 82
Partly Sunny
- 66
- 87
Rain Showers Likely
- 56
- 76
Slight Chance Thunderstorms
- 53
- 74
Mostly Sunny
Today 6 Sep Mercer
Mostly sunny. Highs in the upper 70s. Northeast Winds 5 to 10 Mph.
Tonight 6 Sep Mercer
Mainly clear. Lows in the mid 50s. Northeast Winds 5 to 10 Mph.
Greenville Temperature Statistics
September Temperature
Port Meadville Airport (17.4 miles)
Lowest 4 September, 2026
66 °FAverage September
72.9 °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