West Mifflin, PA Weather & Growing Conditions
This Afternoon
80°F
Mostly Cloudy
Mostly cloudy. High near 80, with temperatures falling to around 72 in the afternoon. South wind around 8 mph, with gusts as high as 21 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 80°F | Mostly Cloudy | 8 mph S | 13% |
| Tonight | 60°F | Light Rain | 10 mph S | 79% |
| Thursday | 68°F | Chance Light Rain then Mostly Sunny | 8 to 12 mph SW | 31% |
| Thursday Night | 49°F | Partly Cloudy | 8 mph SW | 0% |
| Friday | 61°F | Slight Chance Light Rain | 6 to 9 mph W | 22% |
| Friday Night | 42°F | Slight Chance Light Rain | 9 mph W | 22% |
| Saturday | 50°F | Mostly Cloudy then Chance Light Rain | 9 to 13 mph W | 26% |
| Saturday Night | 39°F | Chance Light Rain then Mostly Cloudy | 8 to 12 mph W | 26% |
| Sunday | 54°F | Mostly Sunny | 8 to 13 mph W | 1% |
| Sunday Night | 37°F | Partly Cloudy | 10 mph W | 2% |
| Monday | 57°F | Mostly Sunny | 9 to 13 mph W | 2% |
| Monday Night | 39°F | Mostly Clear | 10 mph SW | 2% |
| Tuesday | 62°F | Sunny | 9 to 13 mph SW | 0% |
| Tuesday Night | 38°F | Partly Cloudy | 6 to 9 mph W | 1% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for West Mifflin, PA
Last spring frost
Apr 18
First fall frost
Oct 28
Growing season
193 days
Hardiness zone
6b
Explore more for West Mifflin, PA: full frost dates · planting calendar · Pennsylvania frost dates
Climate data from the nearest NOAA station, Pittsburgh Allegheny Co Ap, Pa (1.4 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.