Southwest Greensburg, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Southwest Greensburg, a borough in Westmoreland County, Pennsylvania.
This Afternoon
79°F
Slight Chance Rain Showers
A slight chance of rain showers before 2pm. Partly sunny, with a high near 79. Southeast wind around 5 mph. Chance of precipitation is 20%.
7-day forecast for Southwest Greensburg
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 79°F | Slight Chance Rain Showers | 5 mph SE | 16% |
| Tonight | 64°F | Showers And Thunderstorms | 5 to 8 mph S | 85% |
| Sunday | 78°F | Showers And Thunderstorms | 8 to 13 mph SW | 96% |
| Sunday Night | 55°F | Showers And Thunderstorms Likely | 9 mph N | 59% |
| Monday | 69°F | Chance Rain Showers | 12 mph NE | 39% |
| Monday Night | 53°F | Showers And Thunderstorms Likely | 12 mph E | 67% |
| Tuesday | 64°F | Showers And Thunderstorms Likely | 12 to 17 mph E | 69% |
| Tuesday Night | 50°F | Rain Showers Likely | 15 to 20 mph E | 70% |
| Wednesday | 61°F | Rain Showers Likely | 20 mph E | 70% |
| Wednesday Night | 50°F | Chance Rain Showers | 12 to 18 mph E | 46% |
| Thursday | 66°F | Chance Rain Showers | 14 mph E | 46% |
| Thursday Night | 49°F | Slight Chance Rain Showers | 3 to 12 mph E | 16% |
| Friday | 69°F | Slight Chance Rain Showers | 3 to 9 mph NE | 16% |
| Friday Night | 48°F | Partly Cloudy | 2 to 9 mph NE | 14% |
Forecast source: National Weather Service (api.weather.gov) for Southwest Greensburg (40.292, -79.548). Updated through the day.
Growing snapshot for Southwest Greensburg
Last spring frost
May 1
First fall frost
Oct 13
Growing season
164 days
Hardiness zone
6b
More local growing data for Southwest Greensburg: nearby ZIP 15601 weather · frost dates · planting calendar · Pennsylvania frost dates
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Greensburg
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Climate data from the nearest NOAA station, Mt Pleasant, Pa (7 mi from Southwest Greensburg). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.