Loyalhanna, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Loyalhanna, a community in Westmoreland County, Pennsylvania.
Today
86°F
Areas Of Fog then Sunny
Areas of fog before 9am. Sunny, with a high near 86. East wind 0 to 5 mph.
7-day forecast for Loyalhanna
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 86°F | Areas Of Fog then Sunny | 0 to 5 mph E | 0% |
| Tonight | 66°F | Partly Cloudy | 2 to 6 mph SE | 1% |
| Wednesday | 86°F | Patchy Fog then Scattered Showers And Thunderstorms | 1 to 5 mph SE | 30% |
| Wednesday Night | 68°F | Scattered Showers And Thunderstorms | 1 to 5 mph SE | 43% |
| Thursday | 86°F | Showers And Thunderstorms | 2 to 8 mph SW | 79% |
| Thursday Night | 68°F | Showers And Thunderstorms | 2 to 7 mph SW | 79% |
| Friday | 84°F | Showers And Thunderstorms | 3 to 9 mph SW | 82% |
| Friday Night | 67°F | Showers And Thunderstorms | 2 to 6 mph SW | 82% |
| Saturday | 83°F | Chance Showers And Thunderstorms | 5 to 9 mph SW | 54% |
| Saturday Night | 66°F | Chance Showers And Thunderstorms | 3 to 8 mph SW | 54% |
| Sunday | 86°F | Chance Showers And Thunderstorms | 5 to 10 mph SW | 26% |
| Sunday Night | 69°F | Chance Showers And Thunderstorms | 6 to 9 mph SW | 26% |
| Monday | 86°F | Slight Chance Rain Showers then Chance Showers And Thunderstorms | 10 to 14 mph SW | 43% |
| Monday Night | 68°F | Chance Showers And Thunderstorms | 6 to 12 mph SW | 51% |
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 Aug 4, 2026.