Hellertown, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Hellertown, a borough in Northampton County, Pennsylvania.
Tonight
48°F
Partly Cloudy
Partly cloudy, with a low around 48. South wind 0 to 5 mph.
7-day forecast for Hellertown
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 48°F | Partly Cloudy | 0 to 5 mph S | 2% |
| Wednesday | 73°F | Patchy Fog then Sunny | 0 to 10 mph SW | 3% |
| Wednesday Night | 58°F | Mostly Cloudy | 5 mph S | 9% |
| Thursday | 72°F | Light Rain Likely | 5 to 10 mph S | 67% |
| Thursday Night | 60°F | Light Rain Likely | 0 to 5 mph W | 68% |
| Friday | 68°F | Light Rain Likely | 0 to 5 mph W | 68% |
| Friday Night | 49°F | Light Rain Likely | 0 to 5 mph NW | 64% |
| Saturday | 65°F | Slight Chance Light Rain | 0 to 5 mph NW | 24% |
| Saturday Night | 40°F | Slight Chance Light Rain then Partly Cloudy | 5 mph NW | 17% |
| Sunday | 60°F | Mostly Sunny | 5 mph W | 14% |
| Sunday Night | 38°F | Slight Chance Light Rain | 5 mph W | 19% |
| Monday | 59°F | Chance Light Rain | 5 to 15 mph NW | 25% |
| Monday Night | 36°F | Slight Chance Light Rain | 5 mph W | 20% |
| Tuesday | 61°F | Slight Chance Light Rain then Mostly Sunny | 5 to 15 mph W | 17% |
Forecast source: National Weather Service (api.weather.gov) for Hellertown (40.581, -75.338). Updated through the day.
Growing snapshot for Hellertown
Last spring frost
Apr 21
First fall frost
Oct 22
Growing season
184 days
Hardiness zone
7a
More local growing data for Hellertown: nearby ZIP 18015 weather · frost dates · planting calendar · Pennsylvania frost dates
Nearby towns & communities
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Northampton
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Climate data from the nearest NOAA station, Springtown 1 Nne, Pa (4.8 mi from Hellertown). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.