Youngstown, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Youngstown, a borough in Westmoreland County, Pennsylvania.
This Afternoon
78°F
Sunny
Sunny. High near 78, with temperatures falling to around 72 in the afternoon. South wind around 7 mph.
7-day forecast for Youngstown
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 78°F | Sunny | 7 mph S | 1% |
| Tonight | 53°F | Mostly Clear | 6 mph SE | 2% |
| Wednesday | 78°F | Partly Sunny | 3 to 9 mph SE | 3% |
| Wednesday Night | 61°F | Light Rain | 7 to 12 mph S | 99% |
| Thursday | 71°F | Light Rain Likely | 8 to 14 mph SW | 61% |
| Thursday Night | 52°F | Mostly Cloudy then Slight Chance Light Rain | 1 to 7 mph SW | 15% |
| Friday | 66°F | Slight Chance Light Rain | 1 to 7 mph W | 21% |
| Friday Night | 46°F | Chance Light Rain | 1 to 7 mph NW | 38% |
| Saturday | 56°F | Chance Light Rain | 7 to 14 mph W | 38% |
| Saturday Night | 38°F | Chance Light Rain | 5 to 12 mph W | 32% |
| Sunday | 56°F | Slight Chance Light Rain | 6 to 14 mph SW | 19% |
| Sunday Night | 37°F | Chance Light Rain | 14 mph SW | 26% |
| Monday | 56°F | Chance Light Rain | 14 to 18 mph W | 35% |
| Monday Night | 38°F | Chance Light Rain | 14 to 17 mph SW | 35% |
Forecast source: National Weather Service (api.weather.gov) for Youngstown (40.280, -79.366). Updated through the day.
Growing snapshot for Youngstown
Last spring frost
May 1
First fall frost
Oct 13
Growing season
164 days
More local growing data for Youngstown: nearby ZIP 15696 weather · frost dates · planting calendar · Pennsylvania frost dates
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Climate data from the nearest NOAA station, Mt Pleasant, Pa (8.3 mi from Youngstown). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 3, 2026.