Greenville, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Greenville, a borough in Mercer County, Pennsylvania.
Overnight
55°F
Mostly Cloudy
Mostly cloudy, with a low around 55. East wind around 3 mph.
7-day forecast for Greenville
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 55°F | Mostly Cloudy | 3 mph E | 1% |
| Saturday | 74°F | Mostly Cloudy | 7 mph E | 8% |
| Saturday Night | 61°F | Showers And Thunderstorms Likely | 6 mph SE | 63% |
| Sunday | 72°F | Showers And Thunderstorms | 6 to 12 mph W | 89% |
| Sunday Night | 50°F | Chance Rain Showers then Mostly Cloudy | 7 to 12 mph NE | 48% |
| Monday | 67°F | Mostly Cloudy | 12 mph NE | 9% |
| Monday Night | 49°F | Chance Rain Showers | 12 mph NE | 45% |
| Tuesday | 63°F | Chance Rain Showers | 15 mph E | 45% |
| Tuesday Night | 48°F | Rain Showers Likely | 17 mph E | 56% |
| Wednesday | 63°F | Rain Showers Likely | 14 to 18 mph E | 56% |
| Wednesday Night | 49°F | Showers And Thunderstorms Likely | 13 to 16 mph SE | 62% |
| Thursday | 65°F | Showers And Thunderstorms Likely | 9 to 13 mph E | 59% |
| Thursday Night | 48°F | Slight Chance Rain Showers | 5 to 9 mph E | 21% |
| Friday | 69°F | Slight Chance Rain Showers | 6 to 10 mph NE | 19% |
Forecast source: National Weather Service (api.weather.gov) for Greenville (41.405, -80.384). Updated through the day.
Growing snapshot for Greenville
Last spring frost
May 4
First fall frost
Oct 14
Growing season
161 days
Hardiness zone
6a
More local growing data for Greenville: nearby ZIP 16125 weather · frost dates · planting calendar · Pennsylvania frost dates
Nearby towns & communities
Clark
Farrell
Fredonia
Grove City
Hermitage
Jackson Center
Lake Latonka
Mercer
New Lebanon
Reynolds Heights
Sandy Lake
Sharon
Sharpsville
Sheakleyville
Stoneboro
West Middlesex
Wheatland
Climate data from the nearest NOAA station, Jamestown 2 Nw, Pa (8.2 mi from Greenville). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.