Sewickley, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Sewickley, a borough in Allegheny County, Pennsylvania.
Today
77°F
Partly Sunny
Partly sunny, with a high near 77. East wind around 5 mph.
7-day forecast for Sewickley
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 77°F | Partly Sunny | 5 mph E | 4% |
| Tonight | 65°F | Showers And Thunderstorms Likely | 5 mph SE | 70% |
| Sunday | 76°F | Showers And Thunderstorms | 5 to 8 mph SW | 97% |
| Sunday Night | 56°F | Showers And Thunderstorms | 9 mph N | 97% |
| Monday | 66°F | Chance Rain Showers | 10 mph NE | 36% |
| Monday Night | 54°F | Rain Showers Likely | 12 mph NE | 59% |
| Tuesday | 62°F | Rain Showers Likely | 14 mph E | 60% |
| Tuesday Night | 52°F | Rain Showers Likely | 15 mph E | 63% |
| Wednesday | 62°F | Rain Showers Likely | 14 mph E | 63% |
| Wednesday Night | 52°F | Showers And Thunderstorms Likely | 9 to 13 mph E | 62% |
| Thursday | 64°F | Rain Showers Likely | 9 mph E | 58% |
| Thursday Night | 51°F | Chance Rain Showers | 3 to 8 mph NE | 25% |
| Friday | 67°F | Slight Chance Rain Showers | 7 mph NE | 18% |
| Friday Night | 50°F | Slight Chance Rain Showers then Partly Cloudy | 3 to 7 mph NE | 18% |
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
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, Glenwillard Dashields L&D, Pa (3.4 mi from Sewickley). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.