Swissvale, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Swissvale, a borough in Allegheny County, Pennsylvania.
Overnight
58°F
Patchy Fog
Patchy fog between 4am and 5am. Clear, with a low around 58. Northeast wind around 2 mph.
7-day forecast for Swissvale
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 58°F | Patchy Fog | 2 mph NE | 0% |
| Tuesday | 87°F | Patchy Fog then Sunny | 5 mph E | 0% |
| Tuesday Night | 68°F | Mostly Clear | 2 to 6 mph E | 1% |
| Wednesday | 88°F | Partly Sunny then Isolated Showers And Thunderstorms | 2 to 6 mph S | 22% |
| Wednesday Night | 69°F | Scattered Showers And Thunderstorms | 2 to 6 mph S | 50% |
| Thursday | 87°F | Showers And Thunderstorms Likely | 3 to 8 mph SW | 72% |
| Thursday Night | 69°F | Showers And Thunderstorms Likely | 3 to 7 mph SW | 72% |
| Friday | 86°F | Showers And Thunderstorms | 3 to 8 mph SW | 82% |
| Friday Night | 68°F | Showers And Thunderstorms | 3 to 7 mph SW | 82% |
| Saturday | 85°F | Chance Showers And Thunderstorms | 5 to 9 mph SW | 54% |
| Saturday Night | 68°F | Chance Showers And Thunderstorms | 3 to 8 mph SW | 54% |
| Sunday | 88°F | Slight Chance Showers And Thunderstorms | 5 to 10 mph SW | 21% |
| Sunday Night | 70°F | Slight Chance Showers And Thunderstorms | 6 to 10 mph SW | 23% |
| Monday | 88°F | Chance Showers And Thunderstorms | 8 to 13 mph SW | 37% |
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
Nearby towns & communities
Allison Park
Arnold
Aspinwall
Avalon
Bairdford
Bakerstown
Baldwin
Bell Acres
Bellevue
Ben Avon
Ben Avon Heights
Bethel Park
Blaine Hill
Blawnox
Boston
Brackenridge
Braddock
Braddock Hills
Bradford Woods
Brentwood
Bridgeville
Buena Vista
Bunola
Carnegie
Carnot-Moon
Castle Shannon
Chalfant
Cheswick
Churchill
Clairton
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 Aug 4, 2026.