Blawnox, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Blawnox, a borough in Allegheny County, Pennsylvania.
This Afternoon
80°F
Sunny
Sunny, with a high near 80. South wind around 2 mph.
7-day forecast for Blawnox
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 80°F | Sunny | 2 mph S | 1% |
| Tonight | 52°F | Mostly Clear | 2 to 6 mph SE | 2% |
| Wednesday | 79°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 | 8 to 14 mph SW | 36% |
| Thursday Night | 49°F | Partly Cloudy | 1 to 6 mph SW | 4% |
| Friday | 67°F | Partly Sunny | 1 to 7 mph W | 11% |
| Friday Night | 45°F | Chance Light Rain | 3 to 7 mph NW | 26% |
| Saturday | 58°F | Chance Light Rain | 7 to 13 mph W | 29% |
| Saturday Night | 38°F | Chance Light Rain then Mostly Cloudy | 5 to 9 mph W | 26% |
| Sunday | 57°F | Partly Sunny then Slight Chance Light Rain | 5 to 12 mph SW | 17% |
| Sunday Night | 37°F | Slight Chance Light Rain | 10 mph W | 20% |
| Monday | 58°F | Chance Light Rain | 10 to 17 mph W | 30% |
| Monday Night | 37°F | Chance Light Rain then Partly Cloudy | 9 to 13 mph SW | 30% |
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
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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 Nov 3, 2026.