Harman US

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

WhenTempForecastWindPrecip
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.