Tarentum, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Tarentum, a borough in Allegheny County, Pennsylvania.
This Afternoon
80°F
Sunny
Sunny. High near 80, with temperatures falling to around 74 in the afternoon. South wind 0 to 3 mph.
7-day forecast for Tarentum
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 80°F | Sunny | 0 to 3 mph S | 1% |
| Tonight | 51°F | Mostly Clear | 5 mph SE | 2% |
| Wednesday | 78°F | Partly Sunny | 2 to 9 mph SE | 7% |
| Wednesday Night | 61°F | Light Rain | 8 mph S | 98% |
| Thursday | 72°F | Chance Light Rain | 7 to 13 mph SW | 46% |
| Thursday Night | 48°F | Partly Cloudy | 0 to 5 mph SW | 4% |
| Friday | 67°F | Partly Sunny | 1 to 7 mph W | 12% |
| Friday Night | 44°F | Chance Light Rain | 2 to 6 mph NW | 28% |
| Saturday | 57°F | Chance Light Rain | 6 to 12 mph W | 30% |
| Saturday Night | 36°F | Slight Chance Light Rain then Mostly Cloudy | 3 to 8 mph W | 24% |
| Sunday | 57°F | Partly Sunny then Slight Chance Light Rain | 3 to 10 mph SW | 17% |
| Sunday Night | 35°F | Slight Chance Light Rain | 9 mph W | 22% |
| Monday | 57°F | Chance Light Rain | 9 to 16 mph W | 31% |
| Monday Night | 36°F | Chance Light Rain then Partly Cloudy | 8 to 12 mph SW | 31% |
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 Nov 3, 2026.