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Port Royal, PA Weather & Growing Conditions

Local forecast, frost dates, hardiness zone and planting guidance for Port Royal, a borough in Juniata County, Pennsylvania.

This Afternoon
74°F
Slight Chance Rain Showers
A slight chance of rain showers. Partly sunny, with a high near 74. Southeast wind around 1 mph. Chance of precipitation is 20%.

7-day forecast for Port Royal

WhenTempForecastWindPrecip
This Afternoon 74°F Slight Chance Rain Showers 1 mph SE 15%
Tonight 63°F Rain Showers Likely 1 to 6 mph E 65%
Sunday 78°F Rain Showers 2 to 6 mph S 95%
Sunday Night 54°F Showers And Thunderstorms Likely then Mostly Cloudy 5 mph N 61%
Monday 70°F Partly Sunny then Chance Rain Showers 5 mph NE 29%
Monday Night 52°F Rain Showers Likely 6 mph NE 60%
Tuesday 63°F Rain Showers Likely 6 mph E 61%
Tuesday Night 50°F Chance Rain Showers 7 mph E 52%
Wednesday 60°F Chance Rain Showers 7 mph E 45%
Wednesday Night 48°F Chance Rain Showers 6 mph E 32%
Thursday 62°F Slight Chance Rain Showers 6 mph NE 18%
Thursday Night 48°F Slight Chance Rain Showers 3 mph NE 22%
Friday 67°F Chance Rain Showers 5 mph N 25%
Friday Night 49°F Chance Rain Showers 3 mph N 25%

Forecast source: National Weather Service (api.weather.gov) for Port Royal (40.534, -77.389). Updated through the day.

Growing snapshot for Port Royal

Last spring frost
Apr 21
First fall frost
Oct 24
Growing season
185 days
Hardiness zone
7a

More local growing data for Port Royal: nearby ZIP 17056 weather · frost dates · planting calendar · Pennsylvania frost dates

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Climate data from the nearest NOAA station, Lewistown, Pa (11.8 mi from Port Royal). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.