Blawnox, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Blawnox, a borough in Allegheny County, Pennsylvania.
Tonight
58°F
Partly Cloudy
Partly cloudy, with a low around 58. Northeast wind around 7 mph.
7-day forecast for Blawnox
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 58°F | Partly Cloudy | 7 mph NE | 10% |
| Saturday | 81°F | Partly Sunny | 6 mph E | 5% |
| Saturday Night | 66°F | Mostly Cloudy then Showers And Thunderstorms Likely | 7 mph SE | 64% |
| Sunday | 79°F | Showers And Thunderstorms | 9 mph SW | 95% |
| Sunday Night | 59°F | Showers And Thunderstorms | 10 mph N | 95% |
| Monday | 71°F | Chance Rain Showers | 13 mph NE | 38% |
| Monday Night | 58°F | Showers And Thunderstorms Likely | 14 mph E | 62% |
| Tuesday | 68°F | Showers And Thunderstorms Likely | 15 mph E | 71% |
| Tuesday Night | 55°F | Showers And Thunderstorms Likely | 16 mph E | 68% |
| Wednesday | 66°F | Showers And Thunderstorms Likely | 15 mph E | 64% |
| Wednesday Night | 54°F | Chance Showers And Thunderstorms | 9 to 15 mph E | 52% |
| Thursday | 67°F | Chance Showers And Thunderstorms | 10 mph E | 41% |
| Thursday Night | 53°F | Slight Chance Rain Showers | 5 to 10 mph NE | 22% |
| Friday | 72°F | Slight Chance Rain Showers then Partly Sunny | 6 to 9 mph N | 17% |
Forecast source: National Weather Service (api.weather.gov) for Blawnox (40.493, -79.859). Updated through the day.
Growing snapshot for Blawnox
Last spring frost
Apr 16
First fall frost
Nov 1
Growing season
197 days
Hardiness zone
6b
More local growing data for Blawnox: nearby ZIP 15147 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
Boston
Brackenridge
Braddock
Braddock Hills
Bradford Woods
Brentwood
Bridgeville
Buena Vista
Bunola
Carnegie
Carnot-Moon
Castle Shannon
Chalfant
Cheswick
Churchill
Clairton
Clinton
Climate data from the nearest NOAA station, Acmetonia Lock 3, Pa (2.8 mi from Blawnox). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.