Herminie, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Herminie, a community in Westmoreland County, Pennsylvania.
Today
79°F
Partly Sunny
Partly sunny, with a high near 79. East wind around 5 mph.
7-day forecast for Herminie
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 79°F | Partly Sunny | 5 mph E | 3% |
| Tonight | 64°F | Chance Rain Showers | 8 mph SE | 42% |
| Sunday | 78°F | Showers And Thunderstorms | 8 to 12 mph SW | 94% |
| Sunday Night | 55°F | Showers And Thunderstorms | 12 mph N | 89% |
| Monday | 68°F | Chance Rain Showers | 13 mph NE | 41% |
| Monday Night | 53°F | Showers And Thunderstorms Likely | 13 mph E | 70% |
| Tuesday | 64°F | Showers And Thunderstorms Likely | 13 to 17 mph E | 70% |
| Tuesday Night | 50°F | Rain Showers Likely | 14 to 18 mph E | 62% |
| Wednesday | 61°F | Rain Showers Likely | 17 mph E | 62% |
| Wednesday Night | 50°F | Showers And Thunderstorms Likely | 9 to 16 mph E | 56% |
| Thursday | 66°F | Chance Rain Showers | 12 mph E | 54% |
| Thursday Night | 49°F | Chance Showers And Thunderstorms | 5 to 12 mph NE | 32% |
| Friday | 68°F | Partly Sunny then Slight Chance Rain Showers | 6 to 10 mph NE | 20% |
| Friday Night | 49°F | Slight Chance Rain Showers then Partly Cloudy | 5 to 9 mph NE | 20% |
Forecast source: National Weather Service (api.weather.gov) for Herminie (40.263, -79.714). Updated through the day.
Growing snapshot for Herminie
Last spring frost
May 2
First fall frost
Oct 20
Growing season
170 days
Hardiness zone
6b
More local growing data for Herminie: nearby ZIP 15637 weather · frost dates · planting calendar · Pennsylvania frost dates
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Level Green
Climate data from the nearest NOAA station, Mckeesport, Pa (9.5 mi from Herminie). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.