Royalton, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Royalton, a borough in Dauphin County, Pennsylvania.
Overnight
49°F
Patchy Fog
Patchy fog after 4am. Mostly clear, with a low around 49. Southeast wind around 3 mph.
7-day forecast for Royalton
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 49°F | Patchy Fog | 3 mph SE | 0% |
| Wednesday | 76°F | Patchy Fog then Mostly Sunny | 1 to 12 mph S | 1% |
| Wednesday Night | 61°F | Mostly Cloudy then Chance Light Rain | 7 to 12 mph SE | 52% |
| Thursday | 75°F | Light Rain | 7 to 12 mph S | 81% |
| Thursday Night | 59°F | Chance Light Rain then Rain Showers Likely | 1 to 6 mph W | 65% |
| Friday | 70°F | Rain Showers Likely | 3 mph NW | 60% |
| Friday Night | 48°F | Chance Rain Showers | 5 mph NW | 51% |
| Saturday | 64°F | Slight Chance Rain Showers | 6 to 12 mph NW | 16% |
| Saturday Night | 40°F | Partly Cloudy | 6 to 9 mph NW | 14% |
| 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 | 6 to 10 mph W | 20% |
| Tuesday | 64°F | Sunny | 7 to 14 mph W | 13% |
Forecast source: National Weather Service (api.weather.gov) for Royalton (40.186, -76.724). Updated through the day.
Growing snapshot for Royalton
Last spring frost
Apr 9
First fall frost
Nov 2
Growing season
206 days
Hardiness zone
7a
More local growing data for Royalton: nearby ZIP 17057 weather · frost dates · planting calendar · Pennsylvania frost dates
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Climate data from the nearest NOAA station, Middletown Harrisburg Intl Ap, Pa (2 mi from Royalton). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.