Hummelstown, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Hummelstown, a borough in Dauphin County, Pennsylvania.
This Afternoon
72°F
Partly Sunny
Partly sunny, with a high near 72. South wind around 6 mph.
7-day forecast for Hummelstown
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 72°F | Partly Sunny | 6 mph S | 2% |
| Tonight | 51°F | Partly Cloudy | 5 mph SE | 2% |
| Wednesday | 76°F | Mostly Sunny | 2 to 12 mph SE | 2% |
| Wednesday Night | 61°F | Mostly Cloudy then Rain Showers Likely | 6 to 9 mph S | 68% |
| Thursday | 75°F | Rain Showers | 6 to 10 mph S | 84% |
| Thursday Night | 59°F | Rain Showers Likely | 1 to 6 mph SW | 59% |
| Friday | 71°F | Rain Showers Likely | 3 mph NW | 58% |
| Friday Night | 48°F | Chance Rain Showers | 5 mph NW | 50% |
| Saturday | 65°F | Slight Chance Rain Showers | 6 to 12 mph NW | 16% |
| Saturday Night | 41°F | Slight Chance Rain Showers then Partly Cloudy | 6 to 10 mph NW | 15% |
| Sunday | 61°F | Mostly Sunny | 6 to 9 mph W | 8% |
| Sunday Night | 39°F | Slight Chance Rain Showers | 8 mph W | 21% |
| Monday | 61°F | Slight Chance Rain Showers | 8 to 15 mph W | 22% |
| Monday Night | 38°F | Slight Chance Rain Showers | 5 to 12 mph W | 21% |
Forecast source: National Weather Service (api.weather.gov) for Hummelstown (40.265, -76.713). Updated through the day.
Growing snapshot for Hummelstown
Last spring frost
Apr 9
First fall frost
Nov 2
Growing season
206 days
Hardiness zone
7a
More local growing data for Hummelstown: nearby ZIP 17036 weather · frost dates · planting calendar · Pennsylvania frost dates
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Climate data from the nearest NOAA station, Middletown Harrisburg Intl Ap, Pa (5 mi from Hummelstown). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 3, 2026.