New Alexandria, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for New Alexandria, a borough in Westmoreland County, Pennsylvania.
Today
77°F
Partly Sunny
Partly sunny, with a high near 77. East wind around 6 mph.
7-day forecast for New Alexandria
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 77°F | Partly Sunny | 6 mph E | 3% |
| Tonight | 63°F | Chance Rain Showers | 5 to 9 mph SE | 48% |
| Sunday | 77°F | Showers And Thunderstorms | 7 to 13 mph SW | 98% |
| Sunday Night | 54°F | Showers And Thunderstorms | 9 mph N | 95% |
| Monday | 68°F | Chance Rain Showers | 12 mph NE | 39% |
| Monday Night | 52°F | Showers And Thunderstorms Likely | 13 mph E | 69% |
| Tuesday | 63°F | Showers And Thunderstorms Likely | 14 to 18 mph E | 69% |
| Tuesday Night | 49°F | Rain Showers Likely | 17 to 21 mph E | 56% |
| Wednesday | 60°F | Rain Showers Likely | 20 mph E | 56% |
| Wednesday Night | 49°F | Showers And Thunderstorms Likely | 12 to 18 mph E | 55% |
| Thursday | 65°F | Chance Rain Showers | 12 mph E | 54% |
| Thursday Night | 48°F | Chance Showers And Thunderstorms | 3 to 12 mph E | 29% |
| Friday | 68°F | Slight Chance Rain Showers | 5 to 9 mph NE | 18% |
| Friday Night | 48°F | Slight Chance Rain Showers then Partly Cloudy | 3 to 9 mph NE | 18% |
Forecast source: National Weather Service (api.weather.gov) for New Alexandria (40.394, -79.418). Updated through the day.
Growing snapshot for New Alexandria
Last spring frost
May 2
First fall frost
Oct 14
Growing season
163 days
Hardiness zone
6b
More local growing data for New Alexandria: nearby ZIP 15670 weather · frost dates · planting calendar · Pennsylvania frost dates
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Climate data from the nearest NOAA station, Loyalhanna Lake, Pa (3.6 mi from New Alexandria). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.