Portal, ND Weather & Growing Conditions
Today
69°F
Sunny
Sunny. High near 69, with temperatures falling to around 67 in the afternoon. West wind 9 to 16 mph, with gusts as high as 24 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 69°F | Sunny | 9 to 16 mph W | 0% |
| Tonight | 49°F | Mostly Clear | 5 to 13 mph SW | 1% |
| Wednesday | 76°F | Mostly Sunny | 12 to 17 mph W | 7% |
| Wednesday Night | 51°F | Partly Cloudy | 6 to 15 mph W | 8% |
| Thursday | 80°F | Sunny | 8 to 15 mph W | 1% |
| Thursday Night | 52°F | Mostly Clear | 6 to 12 mph N | 2% |
| Friday | 76°F | Sunny | 6 to 9 mph NW | 0% |
| Friday Night | 51°F | Partly Cloudy | 7 mph NE | 8% |
| Saturday | 78°F | Mostly Sunny | 6 to 9 mph NE | 8% |
| Saturday Night | 52°F | Partly Cloudy | 7 to 10 mph NE | 9% |
| Sunday | 76°F | Partly Sunny | 6 to 12 mph NE | 9% |
| Sunday Night | 53°F | Chance Rain Showers | 9 to 13 mph NE | 29% |
| Monday | 76°F | Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms | 10 mph NE | 29% |
| Monday Night | 53°F | Chance Showers And Thunderstorms | 10 mph E | 31% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Portal, ND
Last spring frost
May 20
First fall frost
Sep 19
Growing season
121 days
Hardiness zone
3b
Explore more for Portal, ND: full frost dates · planting calendar · North Dakota frost dates
Climate data from the nearest NOAA station, Northgate 5 Ese, Nd (21 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.