Harleysville, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Harleysville, a community in Montgomery County, Pennsylvania.
Today
84°F
Mostly Sunny
Mostly sunny, with a high near 84. Northeast wind around 0 mph.
7-day forecast for Harleysville
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 84°F | Mostly Sunny | 0 mph | 0% |
| Tonight | 64°F | Mostly Cloudy | 0 mph | 4% |
| Wednesday | 84°F | Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms | 0 to 5 mph E | 68% |
| Wednesday Night | 70°F | Showers And Thunderstorms Likely | 0 to 5 mph S | 64% |
| Thursday | 88°F | Slight Chance Rain Showers then Chance Showers And Thunderstorms | 0 to 10 mph SW | 43% |
| Thursday Night | 71°F | Chance Showers And Thunderstorms | 0 to 10 mph SW | 48% |
| Friday | 88°F | Mostly Sunny then Chance Showers And Thunderstorms | 0 to 5 mph SW | 46% |
| Friday Night | 69°F | Chance Showers And Thunderstorms | 0 to 5 mph W | 46% |
| Saturday | 87°F | Partly Sunny then Chance Showers And Thunderstorms | 0 to 5 mph W | 40% |
| Saturday Night | 68°F | Chance Showers And Thunderstorms | 0 to 5 mph NW | 40% |
| Sunday | 87°F | Mostly Sunny | 0 to 5 mph W | 12% |
| Sunday Night | 69°F | Mostly Clear | 0 to 5 mph SW | 12% |
| Monday | 89°F | Sunny | 0 to 10 mph W | 11% |
| Monday Night | 69°F | Slight Chance Showers And Thunderstorms | 0 to 10 mph W | 17% |
Forecast source: National Weather Service (api.weather.gov) for Harleysville (40.278, -75.388). Updated through the day.
Growing snapshot for Harleysville
Last spring frost
Apr 24
First fall frost
Oct 15
Growing season
173 days
Hardiness zone
7a
More local growing data for Harleysville: nearby ZIP 19438 weather · frost dates · planting calendar · Pennsylvania frost dates
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Climate data from the nearest NOAA station, Graterford 1 E, Pa (3.3 mi from Harleysville). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.