Loyalhanna, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Loyalhanna, a community in Westmoreland County, Pennsylvania.
Overnight
51°F
Mostly Clear
Mostly clear, with a low around 51. East wind around 1 mph.
7-day forecast for Loyalhanna
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 51°F | Mostly Clear | 1 mph E | 1% |
| Wednesday | 78°F | Partly Sunny | 0 to 10 mph SE | 1% |
| Wednesday Night | 60°F | Light Rain | 7 to 10 mph S | 90% |
| Thursday | 70°F | Light Rain Likely then Partly Sunny | 8 to 15 mph SW | 69% |
| Thursday Night | 48°F | Partly Cloudy | 1 to 6 mph SW | 3% |
| Friday | 63°F | Partly Sunny then Slight Chance Light Rain | 2 to 9 mph SW | 19% |
| Friday Night | 40°F | Chance Light Rain | 1 to 7 mph W | 47% |
| Saturday | 52°F | Chance Light Rain | 8 to 16 mph W | 47% |
| Saturday Night | 35°F | Chance Light Rain | 7 to 14 mph W | 32% |
| Sunday | 54°F | Slight Chance Light Rain then Partly Sunny | 8 to 17 mph W | 15% |
| Sunday Night | 32°F | Partly Cloudy | 8 to 14 mph W | 10% |
| Monday | 55°F | Mostly Sunny then Slight Chance Light Rain | 10 to 18 mph W | 15% |
| Monday Night | 33°F | Slight Chance Light Rain then Partly Cloudy | 8 to 14 mph SW | 15% |
| Tuesday | 59°F | Mostly Sunny | 14 to 21 mph SW | 5% |
Forecast source: National Weather Service (api.weather.gov) for Loyalhanna (40.314, -79.356). Updated through the day.
Growing snapshot for Loyalhanna
Last spring frost
May 1
First fall frost
Oct 13
Growing season
164 days
Hardiness zone
6b
More local growing data for Loyalhanna: nearby ZIP 15661 weather · frost dates · planting calendar · Pennsylvania frost dates
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Climate data from the nearest NOAA station, Mt Pleasant, Pa (10.4 mi from Loyalhanna). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.