Greenville Weather Forecast
- 67
- 87
Severe Tstms
- 64
- 82
Rain Showers Likely
- 54
- 79
Partly Sunny
- 55
- 77
Mostly Sunny
- 57
- 78
Partly Sunny
- 63
- 81
Mostly Cloudy
- 67
- 84
Chance Thunderstorms
Today 3 Sep Mercer
Partly cloudy with a chance of Showers and Thunderstorms. Some Thunderstorms may be severe with heavy rainfall. Unseasonably warm. Near steady temperature in the mid 80s. West Winds 5 to 10 Mph. Chance of rain 50 percent.
Tonight 3 Sep Mercer
Showers and Thunderstorms likely this Evening, then Showers likely with a chance of Thunderstorms after midnight. Some Thunderstorms may be severe with gusty Winds and heavy rainfall this evening. Some Thunderstorms may produce gusty Winds after midnight. Warm with Lows in the upper 60s. West Winds 5 to 10 Mph. Chance of rain 70 percent.
Greenville Temperature Statistics
September Temperature
Port Meadville Airport (17.4 miles)
Lowest 1 September, 2026
71.1 °FAverage September
76.3 °FHighest 1 September, 2026
84.9 °F
Climate (2021–2026)
Port Meadville Airport (17.4 miles)
Average Low 2021–2026
42.6 °FAverage 2021–2026
50.9 °FAverage High 2021–2026
59.2 °F