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
86°F
Patchy Fog then Sunny
Patchy fog before 9am. Sunny, with a high near 86. East wind around 3 mph.
7-day forecast for Belle Vernon
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 86°F | Patchy Fog then Sunny | 3 mph E | 0% |
| Tonight | 67°F | Partly Cloudy | 1 to 5 mph SE | 1% |
| Wednesday | 87°F | Mostly Sunny then Isolated Showers And Thunderstorms | 1 to 5 mph S | 17% |
| Wednesday Night | 69°F | Scattered Showers And Thunderstorms | 5 mph S | 48% |
| Thursday | 86°F | Showers And Thunderstorms | 3 to 8 mph SW | 76% |
| Thursday Night | 68°F | Showers And Thunderstorms then Chance Showers And Thunderstorms | 2 to 6 mph SW | 76% |
| Friday | 85°F | Showers And Thunderstorms | 3 to 8 mph SW | 82% |
| Friday Night | 67°F | Showers And Thunderstorms | 6 mph SW | 82% |
| Saturday | 84°F | Showers And Thunderstorms Likely | 6 to 9 mph SW | 59% |
| Saturday Night | 67°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 3 to 7 mph SW | 59% |
| Sunday | 86°F | Slight Chance Showers And Thunderstorms | 5 to 9 mph SW | 24% |
| Sunday Night | 69°F | Slight Chance Showers And Thunderstorms | 8 mph SW | 24% |
| Monday | 87°F | Chance Showers And Thunderstorms | 8 to 12 mph SW | 36% |
| Monday Night | 68°F | Chance Showers And Thunderstorms | 6 to 9 mph SW | 48% |
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 Aug 4, 2026.