Port Allegany, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Port Allegany, a borough in Mckean County, Pennsylvania.
Today
67°F
Partly Sunny
Partly sunny, with a high near 67. Southeast wind around 5 mph.
7-day forecast for Port Allegany
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 67°F | Partly Sunny | 5 mph SE | 1% |
| Tonight | 54°F | Rain Showers | 5 to 13 mph SE | 95% |
| Sunday | 66°F | Rain Showers | 6 to 10 mph SW | 95% |
| Sunday Night | 44°F | Chance Rain Showers then Mostly Cloudy | 9 to 13 mph N | 32% |
| Monday | 61°F | Mostly Cloudy | 10 mph NE | 2% |
| Monday Night | 42°F | Mostly Cloudy then Chance Rain Showers | 10 mph NE | 41% |
| Tuesday | 58°F | Chance Rain Showers | 9 mph E | 41% |
| Tuesday Night | 41°F | Chance Rain Showers | 12 mph E | 39% |
| Wednesday | 55°F | Chance Rain Showers | 12 mph E | 39% |
| Wednesday Night | 42°F | Chance Rain Showers | 7 to 10 mph SE | 44% |
| Thursday | 59°F | Chance Rain Showers then Slight Chance Showers And Thunderstorms | 7 mph E | 44% |
| Thursday Night | 42°F | Slight Chance Showers And Thunderstorms | 2 to 7 mph NE | 21% |
| Friday | 63°F | Slight Chance Rain Showers | 3 to 8 mph NE | 17% |
| Friday Night | 42°F | Slight Chance Rain Showers | 2 to 8 mph NE | 16% |
Forecast source: National Weather Service (api.weather.gov) for Port Allegany (41.815, -78.276). Updated through the day.
Growing snapshot for Port Allegany
Last spring frost
May 15
First fall frost
Oct 6
Growing season
144 days
Hardiness zone
5b
More local growing data for Port Allegany: nearby ZIP 16743 weather · frost dates · planting calendar · Pennsylvania frost dates
Nearby towns & communities
Bradford
Eldred
Foster Brook
Kane
Lewis Run
Mount Jewett
Rew
Smethport
University of Pittsburgh Bradford
Climate data from the nearest NOAA station, Port Allegany, Pa (4.3 mi from Port Allegany). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.