Portland, ND Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Portland, a city in Traill County, North Dakota.
Today
46°F
Patchy Fog then Cloudy
Patchy fog before 9am. Cloudy, with a high near 46. North northwest wind around 20 mph, with gusts as high as 31 mph.
7-day forecast for Portland
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 46°F | Patchy Fog then Cloudy | 20 mph NNW | 7% |
| Tonight | 30°F | Mostly Cloudy | 17 mph N | 0% |
| Thursday | 39°F | Mostly Cloudy | 8 to 17 mph N | 0% |
| Thursday Night | 18°F | Partly Cloudy | 1 to 6 mph E | 0% |
| Friday | 43°F | Mostly Sunny | 2 to 14 mph S | 0% |
| Friday Night | 25°F | Partly Cloudy | 9 mph S | 0% |
| Saturday | 54°F | Mostly Sunny | 8 to 16 mph SW | 3% |
| Saturday Night | 31°F | Partly Cloudy | 7 to 14 mph WNW | 0% |
| Sunday | 54°F | Sunny | 7 to 12 mph SW | 0% |
| Sunday Night | 34°F | Partly Cloudy | 9 mph SW | 0% |
| Monday | 57°F | Mostly Sunny | 10 to 22 mph WNW | 1% |
| Monday Night | 31°F | Mostly Clear | 6 to 12 mph WNW | 0% |
| Tuesday | 51°F | Mostly Sunny | 6 to 10 mph WSW | 1% |
| Tuesday Night | 30°F | Partly Cloudy | 6 mph SSW | 1% |
Forecast source: National Weather Service (api.weather.gov) for Portland (47.500, -97.369). Updated through the day.
Growing snapshot for Portland
Last spring frost
May 13
First fall frost
Sep 27
Growing season
136 days
Hardiness zone
4a
More local growing data for Portland: nearby ZIP 58257 weather · frost dates · planting calendar · North Dakota frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Mayville, Nd (3.2 mi from Portland). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.