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
76°F
Partly Sunny
Partly sunny. High near 76, with temperatures falling to around 70 in the afternoon. South wind 5 to 9 mph.
7-day forecast for New Alexandria
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 76°F | Partly Sunny | 5 to 9 mph S | 9% |
| Tonight | 61°F | Light Rain | 7 to 10 mph S | 92% |
| Thursday | 70°F | Chance Light Rain then Partly Sunny | 8 to 15 mph SW | 46% |
| Thursday Night | 47°F | Partly Cloudy | 2 to 6 mph SW | 2% |
| Friday | 63°F | Partly Sunny then Slight Chance Light Rain | 2 to 9 mph SW | 21% |
| Friday Night | 40°F | Chance Light Rain | 2 to 8 mph W | 44% |
| Saturday | 53°F | Chance Light Rain | 8 to 15 mph W | 44% |
| Saturday Night | 34°F | Chance Light Rain | 8 to 15 mph W | 30% |
| Sunday | 54°F | Slight Chance Light Rain then Partly Sunny | 9 to 17 mph W | 15% |
| Sunday Night | 31°F | Partly Cloudy | 9 to 14 mph W | 9% |
| Monday | 55°F | Mostly Sunny then Slight Chance Light Rain | 10 to 17 mph W | 15% |
| Monday Night | 32°F | Slight Chance Light Rain then Partly Cloudy | 8 to 14 mph SW | 15% |
| Tuesday | 59°F | Mostly Sunny | 15 to 21 mph SW | 4% |
| Tuesday Night | 32°F | Partly Cloudy | 5 to 13 mph W | 4% |
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 Nov 4, 2026.