Portland, ND Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Portland, a city in Traill County, North Dakota.
This Afternoon
71°F
Partly Sunny
Partly sunny, with a high near 71. Southeast wind around 16 mph.
7-day forecast for Portland
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 71°F | Partly Sunny | 16 mph SE | 1% |
| Tonight | 51°F | Mostly Cloudy then Patchy Fog | 3 to 15 mph E | 2% |
| Saturday | 71°F | Patchy Fog then Mostly Cloudy | 3 to 16 mph NE | 11% |
| Saturday Night | 48°F | Mostly Cloudy | 9 to 17 mph NNE | 2% |
| Sunday | 68°F | Mostly Cloudy | 10 to 14 mph NE | 0% |
| Sunday Night | 45°F | Mostly Cloudy | 3 to 10 mph E | 0% |
| Monday | 68°F | Mostly Sunny | 3 to 10 mph ESE | 0% |
| Monday Night | 42°F | Mostly Clear | 7 mph SE | 0% |
| Tuesday | 69°F | Mostly Sunny | 6 to 18 mph SSE | 0% |
| Tuesday Night | 46°F | Partly Cloudy | 13 to 16 mph SSE | 3% |
| Wednesday | 71°F | Mostly Sunny | 13 to 21 mph SSE | 8% |
| Wednesday Night | 50°F | Mostly Cloudy | 12 to 20 mph SSE | 14% |
| Thursday | 74°F | Mostly Sunny | 10 to 15 mph S | 14% |
| Thursday Night | 52°F | Mostly Clear | 8 to 12 mph SSE | 8% |
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 Sep 19, 2026.