Sewickley, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Sewickley, a borough in Allegheny County, Pennsylvania.
Overnight
54°F
Partly Cloudy
Partly cloudy, with a low around 54. Southeast wind around 1 mph.
7-day forecast for Sewickley
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 54°F | Partly Cloudy | 1 mph SE | 1% |
| Wednesday | 76°F | Mostly Cloudy then Chance Light Rain | 1 to 9 mph SE | 35% |
| Wednesday Night | 60°F | Light Rain | 7 to 10 mph S | 93% |
| Thursday | 68°F | Mostly Sunny | 6 to 12 mph SW | 9% |
| Thursday Night | 48°F | Partly Cloudy | 1 to 5 mph SW | 1% |
| Friday | 62°F | Partly Sunny then Slight Chance Light Rain | 2 to 7 mph SW | 17% |
| Friday Night | 42°F | Chance Light Rain | 3 to 7 mph W | 36% |
| Saturday | 52°F | Chance Light Rain | 7 to 10 mph W | 31% |
| Saturday Night | 37°F | Chance Light Rain | 5 to 8 mph W | 25% |
| Sunday | 54°F | Mostly Sunny | 5 to 12 mph W | 6% |
| Sunday Night | 35°F | Partly Cloudy | 8 mph W | 5% |
| Monday | 55°F | Mostly Sunny | 6 to 10 mph W | 10% |
| Monday Night | 36°F | Mostly Clear | 7 mph SW | 8% |
| Tuesday | 59°F | Mostly Sunny | 8 to 13 mph SW | 3% |
Forecast source: National Weather Service (api.weather.gov) for Sewickley (40.540, -80.179). Updated through the day.
Growing snapshot for Sewickley
Last spring frost
Apr 8
First fall frost
Nov 8
Growing season
212 days
Hardiness zone
6b
More local growing data for Sewickley: nearby ZIP 15143 weather · frost dates · planting calendar · Pennsylvania frost dates
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Climate data from the nearest NOAA station, Glenwillard Dashields L&D, Pa (3.4 mi from Sewickley). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.