Greensburg, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Greensburg, a city in Westmoreland County, Pennsylvania.
Today
79°F
Partly Sunny
Partly sunny, with a high near 79. East wind around 5 mph.
7-day forecast for Greensburg
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 79°F | Partly Sunny | 5 mph E | 3% |
| Tonight | 63°F | Chance Rain Showers | 6 to 9 mph SE | 42% |
| Sunday | 78°F | Showers And Thunderstorms | 8 to 13 mph SW | 96% |
| Sunday Night | 54°F | Showers And Thunderstorms | 10 mph N | 91% |
| Monday | 69°F | Chance Rain Showers | 12 mph NE | 41% |
| Monday Night | 52°F | Showers And Thunderstorms Likely | 13 mph E | 70% |
| Tuesday | 64°F | Showers And Thunderstorms Likely | 14 to 18 mph E | 70% |
| Tuesday Night | 50°F | Rain Showers Likely | 16 to 21 mph E | 59% |
| Wednesday | 61°F | Rain Showers Likely | 20 mph E | 59% |
| Wednesday Night | 50°F | Chance Showers And Thunderstorms | 10 to 18 mph E | 54% |
| Thursday | 66°F | Chance Rain Showers | 13 mph E | 53% |
| Thursday Night | 49°F | Chance Showers And Thunderstorms | 5 to 13 mph E | 30% |
| Friday | 69°F | Slight Chance Rain Showers | 5 to 10 mph NE | 19% |
| Friday Night | 48°F | Slight Chance Rain Showers then Partly Cloudy | 3 to 10 mph NE | 19% |
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 Sep 19, 2026.