Carnegie, PA Weather & Growing Conditions
Today
86°F
Areas Of Fog then Sunny
Areas of fog before 9am. Sunny, with a high near 86. Northeast wind 1 to 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 86°F | Areas Of Fog then Sunny | 1 to 5 mph NE | 0% |
| Tonight | 68°F | Partly Cloudy | 5 mph SE | 1% |
| Wednesday | 87°F | Partly Sunny then Scattered Showers And Thunderstorms | 1 to 6 mph S | 34% |
| Wednesday Night | 69°F | Scattered Showers And Thunderstorms | 5 mph S | 50% |
| Thursday | 85°F | Showers And Thunderstorms Likely | 3 to 8 mph SW | 70% |
| Thursday Night | 68°F | Showers And Thunderstorms Likely | 2 to 7 mph SW | 70% |
| Friday | 84°F | Showers And Thunderstorms | 3 to 8 mph SW | 83% |
| Friday Night | 67°F | Showers And Thunderstorms | 3 to 7 mph SW | 83% |
| Saturday | 84°F | Chance Showers And Thunderstorms | 5 to 9 mph SW | 54% |
| Saturday Night | 67°F | Chance Showers And Thunderstorms | 3 to 7 mph SW | 54% |
| Sunday | 86°F | Slight Chance Showers And Thunderstorms | 5 to 9 mph SW | 20% |
| Sunday Night | 70°F | Slight Chance Showers And Thunderstorms | 6 to 9 mph SW | 23% |
| Monday | 86°F | Slight Chance Showers And Thunderstorms | 8 to 12 mph SW | 35% |
| Monday Night | 69°F | Chance Showers And Thunderstorms | 6 to 10 mph SW | 49% |
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 Aug 4, 2026.