Slatedale, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Slatedale, a community in Lehigh County, Pennsylvania.
This Afternoon
68°F
Mostly Sunny
Mostly sunny, with a high near 68. Southwest wind 0 to 5 mph.
7-day forecast for Slatedale
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 68°F | Mostly Sunny | 0 to 5 mph SW | 3% |
| Tonight | 48°F | Partly Cloudy then Areas Of Fog | 0 mph | 2% |
| Wednesday | 72°F | Patchy Fog then Partly Sunny | 0 to 5 mph S | 2% |
| Wednesday Night | 56°F | Mostly Cloudy then Chance Light Rain | 0 to 5 mph S | 27% |
| Thursday | 70°F | Light Rain | 5 mph S | 81% |
| Thursday Night | 58°F | Light Rain Likely | 0 to 5 mph SW | 67% |
| Friday | 69°F | Light Rain Likely | 0 mph | 67% |
| Friday Night | 50°F | Light Rain Likely | 0 to 5 mph NW | 61% |
| Saturday | 65°F | Slight Chance Light Rain | 5 mph NW | 19% |
| Saturday Night | 43°F | Slight Chance Light Rain | 5 mph NW | 19% |
| Sunday | 61°F | Mostly Sunny | 5 mph NW | 14% |
| Sunday Night | 41°F | Partly Cloudy then Chance Light Rain | 0 to 5 mph NW | 25% |
| Monday | 57°F | Chance Light Rain | 5 to 10 mph NW | 34% |
| Monday Night | 40°F | Chance Light Rain | 5 to 10 mph W | 34% |
Forecast source: National Weather Service (api.weather.gov) for Slatedale (40.744, -75.659). Updated through the day.
Growing snapshot for Slatedale
Last spring frost
Apr 21
First fall frost
Oct 23
Growing season
184 days
Hardiness zone
6b
More local growing data for Slatedale: nearby ZIP 18079 weather · frost dates · planting calendar · Pennsylvania frost dates
Nearby towns & communities
Alburtis
Allentown
Ancient Oaks
Bethlehem
Breinigsville
Catasauqua
Cementon
Cetronia
Coopersburg
Coplay
DeSales University
Dorneyville
Egypt
Emmaus
Fountain Hill
Fullerton
Hokendauqua
Laurys Station
Macungie
New Tripoli
North Catasauqua
Schnecksville
Slatington
Stiles
Trexlertown
Wescosville
Climate data from the nearest NOAA station, Lehighton 1Ssw, Pa (5.8 mi from Slatedale). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 3, 2026.