Harleysville, PA Weather & Growing Conditions
This Afternoon
74°F
Mostly Sunny
Mostly sunny, with a high near 74. East wind around 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 74°F | Mostly Sunny | 5 mph E | 2% |
| Tonight | 57°F | Mostly Cloudy then Slight Chance Rain Showers | 5 to 10 mph E | 20% |
| Sunday | 73°F | Rain Showers Likely then Slight Chance Showers And Thunderstorms | 5 to 10 mph S | 66% |
| Sunday Night | 56°F | Showers And Thunderstorms | 5 to 10 mph W | 86% |
| Monday | 68°F | Slight Chance Rain Showers | 5 to 10 mph NE | 23% |
| Monday Night | 49°F | Chance Rain Showers | 5 to 10 mph NE | 34% |
| Tuesday | 62°F | Chance Rain Showers | 10 to 15 mph NE | 40% |
| Tuesday Night | 48°F | Chance Rain Showers | 10 to 15 mph NE | 36% |
| Wednesday | 62°F | Chance Rain Showers | 15 mph NE | 30% |
| Wednesday Night | 48°F | Chance Rain Showers | 15 mph NE | 32% |
| Thursday | 62°F | Chance Rain Showers | 15 mph NE | 33% |
| Thursday Night | 48°F | Chance Rain Showers | 10 to 15 mph NE | 33% |
| Friday | 65°F | Chance Rain Showers | 10 to 15 mph N | 26% |
| Friday Night | 48°F | Chance Rain Showers | 5 to 15 mph N | 25% |
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 19, 2026.