Swissvale, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Swissvale, a borough in Allegheny County, Pennsylvania.
This Afternoon
78°F
Partly Sunny
Partly sunny, with a high near 78. North wind around 8 mph.
7-day forecast for Swissvale
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 78°F | Partly Sunny | 8 mph N | 11% |
| Tonight | 59°F | Partly Cloudy | 5 to 8 mph NE | 10% |
| Saturday | 80°F | Partly Sunny | 6 mph E | 5% |
| Saturday Night | 66°F | Mostly Cloudy then Showers And Thunderstorms Likely | 6 mph SE | 62% |
| Sunday | 79°F | Showers And Thunderstorms | 6 to 9 mph SW | 95% |
| Sunday Night | 60°F | Showers And Thunderstorms | 9 mph N | 95% |
| Monday | 70°F | Chance Rain Showers | 12 mph NE | 39% |
| Monday Night | 59°F | Showers And Thunderstorms Likely | 13 mph E | 63% |
| Tuesday | 67°F | Showers And Thunderstorms Likely | 13 to 16 mph E | 71% |
| Tuesday Night | 55°F | Showers And Thunderstorms Likely | 13 to 16 mph E | 69% |
| Wednesday | 65°F | Showers And Thunderstorms Likely | 15 mph E | 65% |
| Wednesday Night | 55°F | Chance Showers And Thunderstorms | 9 to 15 mph E | 52% |
| Thursday | 67°F | Chance Rain Showers | 10 mph E | 41% |
| Thursday Night | 53°F | Slight Chance Rain Showers | 5 to 10 mph NE | 21% |
Forecast source: National Weather Service (api.weather.gov) for Swissvale (40.420, -79.886). Updated through the day.
Growing snapshot for Swissvale
Last spring frost
Apr 5
First fall frost
Nov 10
Growing season
219 days
Hardiness zone
6b
More local growing data for Swissvale: nearby ZIP 15218 weather · frost dates · planting calendar · Pennsylvania frost dates
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Climate data from the nearest NOAA station, Braddock Lock 2, Pa (2.7 mi from Swissvale). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.