Penbrook, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Penbrook, a borough in Dauphin County, Pennsylvania.
Tonight
51°F
Partly Cloudy
Partly cloudy, with a low around 51. Southeast wind around 3 mph.
7-day forecast for Penbrook
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 51°F | Partly Cloudy | 3 mph SE | 1% |
| Wednesday | 75°F | Mostly Sunny | 2 to 10 mph SE | 2% |
| Wednesday Night | 61°F | Mostly Cloudy then Rain Showers Likely | 6 to 9 mph S | 72% |
| Thursday | 73°F | Rain Showers | 5 to 9 mph S | 82% |
| Thursday Night | 58°F | Chance Rain Showers | 1 to 5 mph W | 54% |
| Friday | 69°F | Chance Rain Showers | 3 mph NW | 54% |
| Friday Night | 49°F | Chance Rain Showers | 3 mph NW | 49% |
| Saturday | 63°F | Slight Chance Rain Showers | 5 to 10 mph NW | 15% |
| Saturday Night | 41°F | Partly Cloudy | 5 to 9 mph NW | 14% |
| Sunday | 60°F | Mostly Sunny | 5 to 8 mph W | 8% |
| Sunday Night | 39°F | Slight Chance Rain Showers | 7 mph W | 20% |
| Monday | 59°F | Slight Chance Rain Showers | 7 to 14 mph NW | 23% |
| Monday Night | 39°F | Slight Chance Rain Showers | 5 to 9 mph W | 21% |
| Tuesday | 63°F | Mostly Sunny | 6 to 13 mph W | 12% |
Forecast source: National Weather Service (api.weather.gov) for Penbrook (40.278, -76.848). Updated through the day.
Growing snapshot for Penbrook
Last spring frost
Apr 15
First fall frost
Oct 23
Growing season
189 days
Hardiness zone
7a
More local growing data for Penbrook: nearby ZIP 17103 weather · frost dates · planting calendar · Pennsylvania frost dates
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Climate data from the nearest NOAA station, Harrisburg 1 Ne, Pa (0.6 mi from Penbrook). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.