Greensburg, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Greensburg, a city in Westmoreland County, Pennsylvania.
Today
86°F
Sunny
Sunny, with a high near 86. East wind 1 to 5 mph.
7-day forecast for Greensburg
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 86°F | Sunny | 1 to 5 mph E | 0% |
| Tonight | 66°F | Partly Cloudy | 2 to 6 mph E | 1% |
| Wednesday | 87°F | Partly Sunny then Scattered Showers And Thunderstorms | 2 to 6 mph SE | 25% |
| Wednesday Night | 68°F | Scattered Showers And Thunderstorms | 2 to 6 mph SE | 45% |
| Thursday | 86°F | Showers And Thunderstorms | 3 to 9 mph SW | 77% |
| Thursday Night | 68°F | Showers And Thunderstorms | 3 to 7 mph SW | 77% |
| Friday | 85°F | Showers And Thunderstorms | 5 to 9 mph SW | 82% |
| Friday Night | 66°F | Showers And Thunderstorms | 3 to 7 mph SW | 82% |
| Saturday | 84°F | Showers And Thunderstorms Likely | 6 to 9 mph SW | 55% |
| Saturday Night | 66°F | Showers And Thunderstorms Likely | 5 to 8 mph SW | 55% |
| Sunday | 86°F | Chance Showers And Thunderstorms | 6 to 12 mph SW | 26% |
| Sunday Night | 69°F | Chance Showers And Thunderstorms | 9 mph SW | 26% |
| Monday | 87°F | Chance Showers And Thunderstorms | 10 to 15 mph SW | 43% |
| Monday Night | 68°F | Chance Showers And Thunderstorms | 7 to 12 mph SW | 51% |
Forecast source: National Weather Service (api.weather.gov) for Greensburg (40.311, -79.544). Updated through the day.
Growing snapshot for Greensburg
Last spring frost
May 1
First fall frost
Oct 13
Growing season
164 days
Hardiness zone
6b
More local growing data for Greensburg: nearby ZIP 15601 weather · frost dates · planting calendar · Pennsylvania frost dates
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Level Green
Climate data from the nearest NOAA station, Mt Pleasant, Pa (7 mi from Greensburg). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.