Portland, ND Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Portland, a city in Traill County, North Dakota.
Today
74°F
Sunny
Sunny, with a high near 74. West northwest wind around 17 mph.
7-day forecast for Portland
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 74°F | Sunny | 17 mph WNW | 0% |
| Tonight | 48°F | Mostly Clear | 3 to 14 mph SW | 0% |
| Wednesday | 83°F | Sunny | 6 to 20 mph WSW | 0% |
| Wednesday Night | 57°F | Partly Cloudy then Slight Chance Rain Showers | 10 to 16 mph SW | 15% |
| Thursday | 86°F | Slight Chance Rain Showers then Sunny | 10 to 17 mph WSW | 15% |
| Thursday Night | 57°F | Mostly Clear | 7 to 15 mph WNW | 4% |
| Friday | 84°F | Sunny | 9 to 17 mph NW | 4% |
| Friday Night | 55°F | Mostly Clear | 5 to 16 mph NNE | 6% |
| Saturday | 83°F | Mostly Sunny | 5 to 17 mph NNE | 7% |
| Saturday Night | 56°F | Mostly Clear then Slight Chance Rain Showers | 8 to 17 mph NNE | 16% |
| Sunday | 81°F | Slight Chance Rain Showers then Mostly Sunny | 8 to 16 mph N | 16% |
| Sunday Night | 57°F | Partly Cloudy then Chance Showers And Thunderstorms | 8 to 16 mph NNE | 27% |
| Monday | 80°F | Chance Showers And Thunderstorms | 8 to 17 mph NNE | 27% |
| Monday Night | 57°F | Slight Chance Rain Showers | 7 to 17 mph NNE | 19% |
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 Aug 4, 2026.