Tarentum, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Tarentum, a borough in Allegheny County, Pennsylvania.
Tonight
57°F
Partly Cloudy
Partly cloudy, with a low around 57. Northeast wind around 7 mph.
7-day forecast for Tarentum
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 57°F | Partly Cloudy | 7 mph NE | 10% |
| Saturday | 79°F | Partly Sunny | 6 mph E | 6% |
| Saturday Night | 64°F | Mostly Cloudy then Showers And Thunderstorms Likely | 6 mph SE | 65% |
| Sunday | 78°F | Showers And Thunderstorms | 5 to 8 mph SW | 96% |
| Sunday Night | 58°F | Showers And Thunderstorms | 8 mph N | 96% |
| Monday | 70°F | Chance Rain Showers | 12 mph NE | 35% |
| Monday Night | 57°F | Showers And Thunderstorms Likely | 13 mph E | 60% |
| Tuesday | 67°F | Showers And Thunderstorms Likely | 14 mph E | 70% |
| Tuesday Night | 54°F | Showers And Thunderstorms Likely | 15 mph E | 66% |
| Wednesday | 65°F | Showers And Thunderstorms Likely | 14 mph E | 63% |
| Wednesday Night | 53°F | Chance Showers And Thunderstorms | 8 to 14 mph E | 52% |
| Thursday | 66°F | Chance Showers And Thunderstorms | 9 mph E | 41% |
| Thursday Night | 52°F | Slight Chance Rain Showers | 3 to 9 mph NE | 22% |
| Friday | 71°F | Slight Chance Rain Showers then Partly Sunny | 5 to 8 mph N | 17% |
Forecast source: National Weather Service (api.weather.gov) for Tarentum (40.604, -79.760). Updated through the day.
Growing snapshot for Tarentum
Last spring frost
Apr 16
First fall frost
Nov 2
Growing season
199 days
Hardiness zone
6b
More local growing data for Tarentum: nearby ZIP 15014 weather · frost dates · planting calendar · Pennsylvania frost dates
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Climate data from the nearest NOAA station, Natrona Lock 4, Pa (1.2 mi from Tarentum). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.