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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.

Today
74°F
Partly Sunny
Partly sunny, with a high near 74. East wind around 2 mph.

7-day forecast for Port Royal

WhenTempForecastWindPrecip
Today 74°F Partly Sunny 2 mph E 3%
Tonight 61°F Rain Showers 1 to 5 mph E 80%
Sunday 75°F Rain Showers 2 to 6 mph S 85%
Sunday Night 54°F Showers And Thunderstorms Likely 5 mph NW 69%
Monday 68°F Mostly Cloudy then Slight Chance Rain Showers 6 mph N 15%
Monday Night 50°F Chance Rain Showers 6 mph NE 51%
Tuesday 60°F Rain Showers Likely 7 mph E 59%
Tuesday Night 48°F Chance Rain Showers 5 to 8 mph E 51%
Wednesday 60°F Chance Rain Showers 8 mph E 47%
Wednesday Night 48°F Chance Rain Showers 6 mph E 39%
Thursday 62°F Chance Rain Showers 6 mph NE 38%
Thursday Night 48°F Chance Rain Showers 3 mph NE 37%
Friday 67°F Chance Rain Showers 5 mph N 29%
Friday Night 48°F Slight Chance Rain Showers 3 mph N 24%

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.