Portland, ND Weather & Growing Conditions
Tonight
51°F
Mostly Cloudy then Patchy Fog
Patchy fog after 1am. Mostly cloudy. Low around 51, with temperatures rising to around 53 overnight. East wind 3 to 8 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 51°F | Mostly Cloudy then Patchy Fog | 3 to 8 mph E | 2% |
| Saturday | 71°F | Patchy Fog then Mostly Cloudy | 3 to 16 mph NE | 11% |
| Saturday Night | 48°F | Mostly Cloudy | 10 to 17 mph NNE | 3% |
| 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 | 47°F | Partly Cloudy | 13 to 16 mph SSE | 4% |
| Wednesday | 71°F | Partly Sunny | 13 to 20 mph SSE | 9% |
| Wednesday Night | 50°F | Slight Chance Rain Showers | 9 to 18 mph SSE | 15% |
| Thursday | 74°F | Mostly Sunny | 9 to 15 mph S | 14% |
| Thursday Night | 52°F | Mostly Clear | 7 to 10 mph SSE | 8% |
| Friday | 75°F | Mostly Sunny | 7 to 17 mph SSE | 7% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Portland, ND
Last spring frost
May 13
First fall frost
Sep 27
Growing season
136 days
Hardiness zone
4a
Explore more for Portland, ND: full frost dates · planting calendar · North Dakota frost dates
Climate data from the nearest NOAA station, Mayville, Nd (6.4 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.