Carnegie, PA Weather & Growing Conditions
Overnight
50°F
Partly Cloudy
Partly cloudy, with a low around 50. Wind around 0 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 50°F | Partly Cloudy | 0 mph | 1% |
| Wednesday | 78°F | Mostly Cloudy then Chance Light Rain | 0 to 10 mph S | 28% |
| 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 | 16% |
| 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 | 20% |
| Friday Night | 42°F | Chance Light Rain | 5 to 8 mph W | 31% |
| Saturday | 53°F | Chance Light Rain | 9 to 13 mph W | 30% |
| Saturday Night | 37°F | Slight Chance Light Rain | 6 to 10 mph W | 24% |
| Sunday | 55°F | Partly Sunny | 6 to 13 mph W | 6% |
| Sunday Night | 35°F | Partly Cloudy | 9 mph W | 5% |
| Monday | 56°F | Mostly Sunny | 7 to 13 mph W | 9% |
| Monday Night | 36°F | Mostly Clear | 6 to 9 mph SW | 8% |
| Tuesday | 60°F | Mostly Sunny | 10 to 14 mph SW | 3% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Carnegie, PA
Last spring frost
Apr 24
First fall frost
Oct 27
Growing season
186 days
Hardiness zone
6b
Explore more for Carnegie, PA: full frost dates · planting calendar · Pennsylvania frost dates
Climate data from the nearest NOAA station, Emsworth L/D Ohio Rvr, Pa (6.7 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.