Youngsville, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Youngsville, a borough in Warren County, Pennsylvania.
Today
77°F
Mostly Cloudy
Mostly cloudy, with a high near 77. South wind around 9 mph.
7-day forecast for Youngsville
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 77°F | Mostly Cloudy | 9 mph S | 4% |
| Tonight | 58°F | Light Rain | 8 mph S | 99% |
| Thursday | 68°F | Light Rain Likely | 5 to 9 mph SW | 57% |
| Thursday Night | 45°F | Mostly Cloudy | 1 to 5 mph SW | 1% |
| Friday | 62°F | Mostly Cloudy then Chance Light Rain | 1 to 5 mph SW | 38% |
| Friday Night | 39°F | Light Rain Likely | 2 mph W | 60% |
| Saturday | 51°F | Light Rain Likely | 3 to 7 mph W | 60% |
| Saturday Night | 33°F | Light Rain Likely | 2 to 6 mph W | 57% |
| Sunday | 54°F | Slight Chance Light Rain then Partly Sunny | 5 to 8 mph W | 15% |
| Sunday Night | 31°F | Slight Chance Light Rain | 2 to 7 mph W | 21% |
| Monday | 55°F | Chance Light Rain | 3 to 8 mph W | 30% |
| Monday Night | 32°F | Slight Chance Light Rain then Partly Cloudy | 5 mph SW | 21% |
| Tuesday | 59°F | Mostly Sunny then Slight Chance Light Rain | 5 to 9 mph SW | 17% |
| Tuesday Night | 31°F | Slight Chance Light Rain | 1 to 5 mph W | 17% |
Forecast source: National Weather Service (api.weather.gov) for Youngsville (41.852, -79.317). Updated through the day.
Growing snapshot for Youngsville
Last spring frost
May 22
First fall frost
Sep 30
Growing season
131 days
Hardiness zone
5b
More local growing data for Youngsville: nearby ZIP 16371 weather · frost dates · planting calendar · Pennsylvania frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Chandlers Valley 1Se, Pa (4.5 mi from Youngsville). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.