Mount Lebanon, PA Weather & Growing Conditions
Overnight
54°F
Mostly Clear
Mostly clear, with a low around 54. South wind around 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 54°F | Mostly Clear | 5 mph S | 1% |
| Wednesday | 78°F | Mostly Cloudy then Chance Light Rain | 5 to 10 mph S | 26% |
| Wednesday Night | 60°F | Light Rain | 12 mph S | 96% |
| Thursday | 69°F | Slight Chance Light Rain then Partly Sunny | 7 to 14 mph SW | 19% |
| Thursday Night | 48°F | Partly Cloudy | 2 to 6 mph SW | 1% |
| Friday | 63°F | Partly Sunny then Slight Chance Light Rain | 2 to 9 mph SW | 21% |
| Friday Night | 43°F | Chance Light Rain | 5 to 8 mph W | 30% |
| Saturday | 55°F | Chance Light Rain | 7 to 12 mph W | 28% |
| Saturday Night | 39°F | Chance Light Rain then Mostly Cloudy | 3 to 8 mph W | 26% |
| Sunday | 56°F | Partly Sunny then Slight Chance Light Rain | 3 to 12 mph W | 15% |
| Sunday Night | 38°F | Slight Chance Light Rain | 9 mph W | 19% |
| Monday | 57°F | Chance Light Rain | 9 to 14 mph W | 28% |
| Monday Night | 39°F | Chance Light Rain then Partly Cloudy | 8 to 13 mph SW | 28% |
| Tuesday | 60°F | Mostly Sunny | 13 to 17 mph SW | 8% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Mount Lebanon, PA
Last spring frost
Apr 18
First fall frost
Oct 28
Growing season
193 days
Hardiness zone
6b
Explore more for Mount Lebanon, PA: full frost dates · planting calendar · Pennsylvania frost dates
Climate data from the nearest NOAA station, Pittsburgh Allegheny Co Ap, Pa (8.2 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.