Swissvale, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Swissvale, a borough in Allegheny County, Pennsylvania.
This Afternoon
79°F
Sunny
Sunny. High near 79, with temperatures falling to around 72 in the afternoon. Southeast wind around 2 mph.
7-day forecast for Swissvale
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 79°F | Sunny | 2 mph SE | 1% |
| Tonight | 53°F | Mostly Clear | 2 to 6 mph SE | 2% |
| Wednesday | 78°F | Partly Sunny | 3 to 10 mph SE | 7% |
| Wednesday Night | 61°F | Light Rain | 9 mph S | 98% |
| Thursday | 72°F | Chance Light Rain | 7 to 14 mph SW | 32% |
| Thursday Night | 49°F | Partly Cloudy | 1 to 6 mph SW | 4% |
| Friday | 66°F | Partly Sunny | 1 to 7 mph W | 11% |
| Friday Night | 46°F | Chance Light Rain | 6 mph NW | 26% |
| Saturday | 57°F | Chance Light Rain | 7 to 13 mph W | 29% |
| Saturday Night | 39°F | Chance Light Rain then Mostly Cloudy | 3 to 9 mph W | 26% |
| Sunday | 56°F | Partly Sunny then Slight Chance Light Rain | 5 to 12 mph SW | 17% |
| Sunday Night | 38°F | Slight Chance Light Rain | 9 mph W | 19% |
| Monday | 57°F | Chance Light Rain | 9 to 17 mph W | 30% |
| Monday Night | 38°F | Chance Light Rain then Partly Cloudy | 12 mph SW | 30% |
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 Nov 4, 2026.