Loyalhanna, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Loyalhanna, a community in Westmoreland County, Pennsylvania.
Tonight
57°F
Partly Cloudy then Patchy Fog
Patchy fog between 2am and 3am. Partly cloudy, with a low around 57. Northeast wind around 3 mph.
7-day forecast for Loyalhanna
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 57°F | Partly Cloudy then Patchy Fog | 3 mph NE | 5% |
| Saturday | 78°F | Partly Sunny | 6 mph E | 3% |
| Saturday Night | 64°F | Mostly Cloudy then Chance Showers And Thunderstorms | 5 to 12 mph SE | 54% |
| Sunday | 77°F | Showers And Thunderstorms | 6 to 12 mph SW | 95% |
| Sunday Night | 60°F | Showers And Thunderstorms | 7 mph N | 95% |
| Monday | 70°F | Chance Rain Showers | 7 to 12 mph NE | 43% |
| Monday Night | 57°F | Showers And Thunderstorms Likely | 12 to 15 mph E | 69% |
| Tuesday | 66°F | Showers And Thunderstorms Likely | 16 to 20 mph E | 73% |
| Tuesday Night | 53°F | Showers And Thunderstorms Likely | 18 to 22 mph E | 67% |
| Wednesday | 63°F | Showers And Thunderstorms Likely | 20 mph E | 65% |
| Wednesday Night | 53°F | Chance Showers And Thunderstorms | 12 to 20 mph E | 53% |
| Thursday | 65°F | Chance Showers And Thunderstorms | 12 mph E | 47% |
| Thursday Night | 52°F | Chance Rain Showers | 2 to 10 mph NE | 28% |
| Friday | 70°F | Slight Chance Rain Showers | 2 to 9 mph NE | 21% |
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 Sep 19, 2026.