Belle Vernon, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Belle Vernon, a borough in Washington County, Pennsylvania.
Today
80°F
Partly Sunny
Partly sunny, with a high near 80. Southeast wind around 3 mph.
7-day forecast for Belle Vernon
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 80°F | Partly Sunny | 3 mph SE | 3% |
| Tonight | 65°F | Chance Rain Showers | 6 mph SE | 46% |
| Sunday | 79°F | Showers And Thunderstorms | 7 to 10 mph SW | 94% |
| Sunday Night | 56°F | Showers And Thunderstorms | 6 to 10 mph N | 92% |
| Monday | 69°F | Chance Rain Showers | 10 mph NE | 43% |
| Monday Night | 54°F | Showers And Thunderstorms Likely | 10 mph E | 72% |
| Tuesday | 65°F | Showers And Thunderstorms Likely | 9 to 14 mph E | 72% |
| Tuesday Night | 51°F | Showers And Thunderstorms Likely | 14 mph E | 65% |
| Wednesday | 62°F | Rain Showers Likely | 14 mph E | 65% |
| Wednesday Night | 51°F | Showers And Thunderstorms Likely | 8 to 13 mph E | 56% |
| Thursday | 67°F | Rain Showers Likely | 9 mph E | 56% |
| Thursday Night | 50°F | Chance Showers And Thunderstorms | 5 to 9 mph NE | 36% |
| Friday | 69°F | Partly Sunny then Slight Chance Rain Showers | 5 to 9 mph NE | 22% |
| Friday Night | 49°F | Slight Chance Rain Showers then Partly Cloudy | 3 to 8 mph NE | 22% |
Forecast source: National Weather Service (api.weather.gov) for Belle Vernon (40.123, -79.862). Updated through the day.
Growing snapshot for Belle Vernon
Last spring frost
Apr 13
First fall frost
Nov 5
Growing season
205 days
Hardiness zone
6b
More local growing data for Belle Vernon: nearby ZIP 15432 weather · frost dates · planting calendar · Pennsylvania frost dates
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Climate data from the nearest NOAA station, Charleroi Lock 4, Pa (3.3 mi from Belle Vernon). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.