Hummelstown, PA Weather & Growing Conditions
Overnight
54°F
Patchy Fog
Patchy fog before 5am. Partly cloudy, with a low around 54. North wind around 3 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 54°F | Patchy Fog | 3 mph N | 0% |
| Saturday | 77°F | Partly Sunny | 6 mph E | 3% |
| Saturday Night | 62°F | Mostly Cloudy then Rain Showers | 6 to 12 mph SE | 78% |
| Sunday | 75°F | Rain Showers | 7 to 13 mph S | 91% |
| Sunday Night | 56°F | Showers And Thunderstorms | 6 to 10 mph W | 91% |
| Monday | 70°F | Slight Chance Rain Showers | 10 mph N | 17% |
| Monday Night | 51°F | Chance Rain Showers | 6 to 12 mph NE | 43% |
| Tuesday | 62°F | Chance Rain Showers | 12 mph E | 50% |
| Tuesday Night | 49°F | Chance Rain Showers | 10 to 14 mph NE | 46% |
| Wednesday | 62°F | Chance Rain Showers | 14 mph NE | 41% |
| Wednesday Night | 50°F | Chance Rain Showers | 10 to 14 mph NE | 36% |
| Thursday | 64°F | Chance Rain Showers | 13 mph NE | 38% |
| Thursday Night | 50°F | Chance Rain Showers | 6 to 12 mph NE | 37% |
| Friday | 68°F | Chance Rain Showers | 12 mph N | 27% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Hummelstown, PA
Last spring frost
Apr 9
First fall frost
Nov 2
Growing season
206 days
Hardiness zone
7a
Explore more for Hummelstown, PA: full frost dates · planting calendar · Pennsylvania frost dates
Climate data from the nearest NOAA station, Middletown Harrisburg Intl Ap, Pa (5 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.