Allentown, PA Weather & Growing Conditions
This Afternoon
82°F
Mostly Sunny
Mostly sunny, with a high near 82. North wind around 10 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 82°F | Mostly Sunny | 10 mph N | 0% |
| Tonight | 54°F | Mostly Clear | 5 to 10 mph N | 0% |
| Saturday | 73°F | Mostly Sunny | 5 mph E | 1% |
| Saturday Night | 59°F | Patchy Fog | 5 mph SE | 53% |
| Sunday | 71°F | Rain Showers | 5 to 10 mph S | 93% |
| Sunday Night | 58°F | Patchy Fog | 0 to 5 mph W | 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 | 31% |
| Tuesday | 62°F | Chance Rain Showers | 10 mph NE | 37% |
| Tuesday Night | 50°F | Chance Rain Showers | 10 mph NE | 35% |
| Wednesday | 61°F | Chance Rain Showers | 10 to 15 mph NE | 33% |
| Wednesday Night | 50°F | Chance Showers And Thunderstorms | 10 mph NE | 39% |
| Thursday | 62°F | Chance Showers And Thunderstorms | 10 mph NE | 36% |
| Thursday Night | 51°F | Chance Showers And Thunderstorms | 5 to 10 mph NE | 32% |
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 (3.3 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.