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
79°F
Patchy Fog then Sunny
Patchy fog before 9am. Sunny, with a high near 79. South wind 0 to 3 mph.
7-day forecast for Port Allegany
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 79°F | Patchy Fog then Sunny | 0 to 3 mph S | 0% |
| Tonight | 57°F | Mostly Clear then Patchy Fog | 6 mph SE | 0% |
| Wednesday | 81°F | Patchy Fog then Chance Showers And Thunderstorms | 6 mph SE | 27% |
| Wednesday Night | 63°F | Chance Showers And Thunderstorms | 6 mph S | 49% |
| Thursday | 81°F | Showers And Thunderstorms | 6 mph SW | 84% |
| Thursday Night | 63°F | Showers And Thunderstorms | 5 mph SW | 84% |
| Friday | 80°F | Showers And Thunderstorms | 6 mph SW | 83% |
| Friday Night | 61°F | Showers And Thunderstorms then Chance Showers And Thunderstorms | 1 to 5 mph SW | 83% |
| Saturday | 79°F | Showers And Thunderstorms Likely | 1 to 6 mph SW | 57% |
| Saturday Night | 61°F | Showers And Thunderstorms Likely | 1 to 5 mph SW | 57% |
| Sunday | 82°F | Partly Sunny then Slight Chance Showers And Thunderstorms | 2 to 7 mph SW | 22% |
| Sunday Night | 63°F | Slight Chance Showers And Thunderstorms | 6 mph SW | 22% |
| Monday | 81°F | Chance Showers And Thunderstorms | 6 to 10 mph W | 44% |
| Monday Night | 61°F | Chance Showers And Thunderstorms | 2 to 8 mph W | 44% |
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 Aug 4, 2026.