Harrisburg, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Harrisburg, a city in Dauphin County, Pennsylvania.
Tonight
54°F
Mostly Clear then Patchy Fog
Patchy fog between 4am and 5am. Mostly clear, with a low around 54. North wind around 6 mph.
7-day forecast for Harrisburg
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 54°F | Mostly Clear then Patchy Fog | 6 mph N | 0% |
| Saturday | 76°F | Patchy Fog then Mostly Sunny | 3 mph E | 3% |
| Saturday Night | 63°F | Mostly Cloudy then Chance Rain Showers | 3 to 8 mph SE | 51% |
| Sunday | 77°F | Rain Showers | 5 to 10 mph S | 96% |
| Sunday Night | 61°F | Showers And Thunderstorms | 3 to 8 mph NW | 96% |
| Monday | 70°F | Chance Rain Showers | 8 mph NE | 35% |
| Monday Night | 57°F | Chance Rain Showers | 6 to 9 mph NE | 49% |
| Tuesday | 63°F | Rain Showers Likely | 10 mph E | 60% |
| Tuesday Night | 52°F | Rain Showers Likely | 12 mph NE | 60% |
| Wednesday | 61°F | Chance Rain Showers | 10 mph NE | 50% |
| Wednesday Night | 52°F | Chance Showers And Thunderstorms | 9 mph NE | 50% |
| Thursday | 63°F | Chance Showers And Thunderstorms | 8 mph NE | 43% |
| Thursday Night | 53°F | Chance Showers And Thunderstorms | 3 to 7 mph N | 39% |
| Friday | 68°F | Slight Chance Rain Showers then Partly Sunny | 8 mph N | 24% |
Forecast source: National Weather Service (api.weather.gov) for Harrisburg (40.276, -76.885). Updated through the day.
Growing snapshot for Harrisburg
Last spring frost
Apr 15
First fall frost
Oct 23
Growing season
189 days
Hardiness zone
7a
More local growing data for Harrisburg: nearby ZIP 17120 weather · frost dates · planting calendar · Pennsylvania frost dates
Nearby towns & communities
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Climate data from the nearest NOAA station, Harrisburg 1 Ne, Pa (1.3 mi from Harrisburg). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.