Greenville Weather Forecast
- 68
- 83
Rain Showers Likely
- 61
- 81
Rain Showers Likely
- 55
- 77
Partly Sunny
- 62
- 76
Rain Showers
- 58
- 75
Chance Rain Showers
- 59
- 72
Chance Rain Showers
- 59
- 73
Chance Rain Showers
Today 16 Sep Mercer
Mostly cloudy in the Morning, then becoming partly sunny. A chance of Showers. Highs in the lower 70s. Chance of rain 40 percent.
Tonight 16 Sep Mercer
Showers likely. A chance of Thunderstorms, mainly this evening. Patchy fog. Warm with Lows in the upper 60s. North Winds around 5 Mph, becoming southeast after midnight. Chance of rain 70 percent.
Greenville Temperature Statistics
September Temperature
Port Meadville Airport (17.4 miles)
Lowest 7 September, 2026
52 °FAverage September
68.6 °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