Portal, ND Weather & Growing Conditions
Tonight
25°F
Mostly Clear
Mostly clear. Low around 25, with temperatures rising to around 27 overnight. West wind around 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 25°F | Mostly Clear | 5 mph W | 0% |
| Wednesday | 51°F | Sunny | 7 mph NW | 0% |
| Wednesday Night | 23°F | Partly Cloudy | 2 to 6 mph NE | 0% |
| Thursday | 44°F | Mostly Sunny | 3 to 8 mph SE | 0% |
| Thursday Night | 27°F | Partly Cloudy | 8 mph S | 0% |
| Friday | 52°F | Mostly Sunny | 10 mph SW | 0% |
| Friday Night | 33°F | Partly Cloudy | 7 to 14 mph SW | 3% |
| Saturday | 53°F | Mostly Sunny | 13 to 21 mph W | 4% |
| Saturday Night | 29°F | Mostly Clear | 6 to 10 mph SW | 1% |
| Sunday | 57°F | Mostly Sunny | 6 to 10 mph S | 0% |
| Sunday Night | 37°F | Partly Cloudy | 10 to 18 mph SW | 1% |
| Monday | 53°F | Sunny | 10 to 21 mph W | 0% |
| Monday Night | 30°F | Partly Cloudy | 8 mph W | 1% |
| Tuesday | 53°F | Mostly Sunny | 7 to 12 mph W | 0% |
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 Nov 4, 2026.