Portland, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Portland, a borough in Northampton County, Pennsylvania.
Overnight
46°F
Patchy Fog
Patchy fog after 4am. Mostly clear, with a low around 46. South wind around 0 mph.
7-day forecast for Portland
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 46°F | Patchy Fog | 0 mph | 3% |
| Wednesday | 74°F | Patchy Fog then Mostly Sunny | 0 to 5 mph S | 5% |
| Wednesday Night | 57°F | Mostly Cloudy | 0 to 5 mph S | 13% |
| Thursday | 72°F | Light Rain Likely | 5 mph S | 72% |
| Thursday Night | 58°F | Light Rain Likely | 0 to 5 mph SW | 67% |
| Friday | 69°F | Light Rain Likely | 0 mph | 67% |
| Friday Night | 49°F | Light Rain Likely | 0 mph | 60% |
| Saturday | 66°F | Slight Chance Light Rain | 0 to 5 mph NW | 21% |
| Saturday Night | 40°F | Slight Chance Light Rain | 0 to 5 mph NW | 19% |
| Sunday | 62°F | Slight Chance Light Rain then Mostly Sunny | 0 to 5 mph W | 16% |
| Sunday Night | 37°F | Slight Chance Light Rain | 0 mph | 18% |
| Monday | 61°F | Chance Light Rain | 0 to 10 mph NW | 25% |
| Monday Night | 35°F | Slight Chance Light Rain | 0 to 5 mph W | 24% |
| Tuesday | 63°F | Slight Chance Light Rain then Mostly Sunny | 5 to 10 mph W | 17% |
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 Nov 4, 2026.