Portland, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Portland, a borough in Northampton County, Pennsylvania.
Today
73°F
Mostly Sunny
Mostly sunny, with a high near 73. East wind 0 to 5 mph.
7-day forecast for Portland
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 73°F | Mostly Sunny | 0 to 5 mph E | 0% |
| Tonight | 55°F | Mostly Cloudy then Chance Rain Showers | 0 mph | 29% |
| Sunday | 69°F | Rain Showers | 0 to 5 mph S | 99% |
| Sunday Night | 53°F | Showers And Thunderstorms | 0 to 5 mph W | 90% |
| Monday | 69°F | Partly Sunny | 5 mph NE | 8% |
| Monday Night | 47°F | Mostly Cloudy then Chance Rain Showers | 5 mph NE | 29% |
| Tuesday | 63°F | Chance Rain Showers | 5 mph NE | 29% |
| Tuesday Night | 46°F | Chance Rain Showers | 5 to 10 mph NE | 26% |
| Wednesday | 64°F | Slight Chance Rain Showers | 10 mph NE | 23% |
| Wednesday Night | 46°F | Chance Rain Showers | 10 mph NE | 30% |
| Thursday | 63°F | Chance Rain Showers | 10 mph NE | 34% |
| Thursday Night | 47°F | Chance Rain Showers | 5 to 10 mph NE | 35% |
| Friday | 67°F | Chance Rain Showers | 5 to 10 mph N | 27% |
| Friday Night | 47°F | Chance Rain Showers | 5 to 10 mph N | 27% |
Forecast source: National Weather Service (api.weather.gov) for Portland (40.922, -75.098). Updated through the day.
Growing snapshot for Portland
Last spring frost
Apr 30
First fall frost
Oct 18
Growing season
168 days
Hardiness zone
6b
More local growing data for Portland: nearby ZIP 18351 weather · frost dates · planting calendar · Pennsylvania frost dates
Nearby towns & communities
Ackermanville
Bangor
Bath
Belfast
Chapman
Cherryville
Chestnut Hill
East Bangor
Eastlawn Gardens
Easton
Freemansburg
Glendon
Hellertown
Martins Creek
Middletown
Morgan Hill
Mount Bethel
Nazareth
Northampton
Old Orchard
Palmer Heights
Pen Argyl
Raubsville
Roseto
Stockertown
Tatamy
Walnutport
West Easton
Wilson
Wind Gap
Climate data from the nearest NOAA station, Belvidere Brg, Nj (6.5 mi from Portland). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.