Harleysville, PA Weather & Growing Conditions
Tonight
59°F
Mostly Cloudy then Chance Rain Showers
A chance of rain showers after 2am. Mostly cloudy, with a low around 59. East wind 5 to 10 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 59°F | Mostly Cloudy then Chance Rain Showers | 5 to 10 mph E | 26% |
| Sunday | 76°F | Rain Showers | 5 to 10 mph S | 85% |
| Sunday Night | 57°F | Showers And Thunderstorms then Mostly Cloudy | 5 to 10 mph W | 77% |
| Monday | 70°F | Partly Sunny then Chance Rain Showers | 5 to 10 mph NE | 25% |
| Monday Night | 51°F | Chance Rain Showers | 5 to 10 mph NE | 32% |
| Tuesday | 64°F | Chance Rain Showers | 10 mph NE | 41% |
| Tuesday Night | 50°F | Chance Rain Showers | 10 to 15 mph NE | 41% |
| Wednesday | 63°F | Slight Chance Rain Showers | 15 mph NE | 23% |
| Wednesday Night | 50°F | Slight Chance Rain Showers | 10 to 15 mph NE | 24% |
| Thursday | 62°F | Chance Rain Showers | 10 to 15 mph NE | 27% |
| Thursday Night | 49°F | Chance Rain Showers | 10 to 15 mph NE | 33% |
| Friday | 65°F | Chance Rain Showers | 10 to 15 mph N | 32% |
| Friday Night | 49°F | Chance Rain Showers | 5 to 15 mph N | 32% |
| Saturday | 70°F | Chance Rain Showers | 10 to 15 mph N | 29% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Harleysville, PA
Last spring frost
Apr 24
First fall frost
Oct 15
Growing season
173 days
Hardiness zone
7a
Explore more for Harleysville, PA: full frost dates · planting calendar · Pennsylvania frost dates
Climate data from the nearest NOAA station, Graterford 1 E, Pa (3.3 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.