Sewickley, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Sewickley, a borough in Allegheny County, Pennsylvania.
Overnight
56°F
Areas Of Fog
Areas of fog after 3am. Mostly clear, with a low around 56. Northeast wind around 1 mph.
7-day forecast for Sewickley
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 56°F | Areas Of Fog | 1 mph NE | 0% |
| Tuesday | 85°F | Areas Of Fog then Sunny | 0 to 3 mph E | 0% |
| Tuesday Night | 67°F | Mostly Clear | 3 mph E | 1% |
| Wednesday | 86°F | Mostly Sunny then Scattered Showers And Thunderstorms | 1 to 5 mph S | 41% |
| Wednesday Night | 68°F | Scattered Showers And Thunderstorms | 3 mph S | 50% |
| Thursday | 85°F | Showers And Thunderstorms Likely | 2 to 7 mph SW | 67% |
| Thursday Night | 68°F | Showers And Thunderstorms Likely | 1 to 6 mph SW | 67% |
| Friday | 83°F | Showers And Thunderstorms | 2 to 6 mph SW | 83% |
| Friday Night | 67°F | Showers And Thunderstorms then Chance Showers And Thunderstorms | 2 to 6 mph SW | 83% |
| Saturday | 83°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 3 to 7 mph SW | 47% |
| Saturday Night | 67°F | Chance Showers And Thunderstorms | 2 to 6 mph SW | 47% |
| Sunday | 85°F | Slight Chance Showers And Thunderstorms | 2 to 8 mph SW | 18% |
| Sunday Night | 70°F | Slight Chance Showers And Thunderstorms | 7 mph SW | 21% |
| Monday | 86°F | Chance Rain Showers | 6 to 9 mph SW | 36% |
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 Aug 4, 2026.