Penbrook, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Penbrook, a borough in Dauphin County, Pennsylvania.
Overnight
54°F
Patchy Fog
Patchy fog between 4am and 5am. Partly cloudy, with a low around 54. North wind around 3 mph.
7-day forecast for Penbrook
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 54°F | Patchy Fog | 3 mph N | 0% |
| Saturday | 76°F | Partly Sunny | 5 mph E | 3% |
| Saturday Night | 62°F | Mostly Cloudy then Rain Showers | 5 to 10 mph SE | 79% |
| Sunday | 75°F | Rain Showers | 6 to 12 mph S | 91% |
| Sunday Night | 56°F | Showers And Thunderstorms | 6 to 10 mph NW | 91% |
| Monday | 69°F | Slight Chance Rain Showers | 9 mph N | 18% |
| Monday Night | 52°F | Chance Rain Showers | 6 to 9 mph NE | 45% |
| Tuesday | 61°F | Chance Rain Showers | 10 mph E | 53% |
| Tuesday Night | 50°F | Chance Rain Showers | 12 mph NE | 48% |
| Wednesday | 61°F | Chance Rain Showers | 13 mph NE | 41% |
| Wednesday Night | 50°F | Chance Rain Showers | 12 mph NE | 36% |
| Thursday | 62°F | Chance Rain Showers | 10 mph NE | 39% |
| Thursday Night | 50°F | Chance Rain Showers | 5 to 9 mph NE | 39% |
| Friday | 67°F | Chance Rain Showers | 9 mph N | 27% |
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 Sep 19, 2026.