Allentown, PA Weather & Growing Conditions
Tonight
53°F
Mostly Clear
Mostly clear, with a low around 53. North wind around 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 53°F | Mostly Clear | 5 mph N | 0% |
| Saturday | 72°F | Mostly Sunny | 5 mph E | 1% |
| Saturday Night | 59°F | Chance Rain Showers | 5 mph SE | 54% |
| Sunday | 71°F | Rain Showers | 5 to 10 mph S | 93% |
| Sunday Night | 58°F | Patchy Fog | 5 mph NW | 93% |
| Monday | 67°F | Chance Rain Showers | 5 to 10 mph NE | 34% |
| Monday Night | 53°F | Chance Rain Showers | 5 to 10 mph NE | 32% |
| Tuesday | 62°F | Chance Rain Showers | 10 to 15 mph NE | 37% |
| Tuesday Night | 49°F | Chance Rain Showers | 10 to 15 mph NE | 36% |
| Wednesday | 61°F | Chance Rain Showers | 10 to 15 mph NE | 33% |
| Wednesday Night | 49°F | Chance Showers And Thunderstorms | 10 to 15 mph NE | 39% |
| Thursday | 62°F | Chance Showers And Thunderstorms | 10 to 15 mph NE | 36% |
| Thursday Night | 50°F | Chance Showers And Thunderstorms | 5 to 10 mph NE | 33% |
| Friday | 68°F | Slight Chance Rain Showers | 5 to 10 mph N | 20% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Allentown, PA
Last spring frost
Apr 20
First fall frost
Oct 24
Growing season
184 days
Hardiness zone
7a
Explore more for Allentown, PA: full frost dates · planting calendar · Pennsylvania frost dates
Climate data from the nearest NOAA station, Allentown Intl Ap, Pa (5.8 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.