Harrisburg, PA Weather & Growing Conditions
Tonight
51°F
Mostly Clear then Patchy Fog
Patchy fog between midnight and 1am. Mostly clear, with a low around 51. Southeast wind around 3 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 51°F | Mostly Clear then Patchy Fog | 3 mph SE | 0% |
| Wednesday | 75°F | Mostly Sunny | 1 to 10 mph S | 0% |
| Wednesday Night | 61°F | Mostly Cloudy then Rain Showers Likely | 5 to 8 mph S | 73% |
| Thursday | 74°F | Rain Showers | 5 to 9 mph S | 81% |
| Thursday Night | 58°F | Chance Rain Showers | 0 to 5 mph SW | 52% |
| Friday | 70°F | Chance Rain Showers | 2 mph NW | 52% |
| Friday Night | 49°F | Chance Rain Showers | 3 mph NW | 48% |
| Saturday | 64°F | Slight Chance Rain Showers | 5 to 10 mph NW | 15% |
| Saturday Night | 41°F | Partly Cloudy | 5 to 8 mph NW | 14% |
| Sunday | 61°F | Mostly Sunny | 5 to 8 mph W | 7% |
| Sunday Night | 39°F | Slight Chance Rain Showers | 6 mph W | 20% |
| Monday | 60°F | Slight Chance Rain Showers | 6 to 14 mph NW | 23% |
| Monday Night | 38°F | Slight Chance Rain Showers | 5 to 9 mph W | 21% |
| Tuesday | 64°F | Mostly Sunny | 6 to 13 mph W | 11% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Harrisburg, PA
Last spring frost
Apr 15
First fall frost
Oct 23
Growing season
189 days
Hardiness zone
7a
Explore more for Harrisburg, PA: full frost dates · planting calendar · Pennsylvania frost dates
Climate data from the nearest NOAA station, Harrisburg 1 Ne, Pa (0.6 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.