Portal, ND Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Portal, a city in Burke County, North Dakota.
Tonight
55°F
Slight Chance Rain Showers
A slight chance of rain showers before 1am, then a chance of rain showers and patchy fog between 1am and 3am, then patchy fog and a slight chance of rain showers. Cloudy. Low around 55, with temperatures rising to around 57 overnight. Northeast wind around 7 mph. Chance of precipitation is 30%.
7-day forecast for Portal
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 55°F | Slight Chance Rain Showers | 7 mph NE | 25% |
| Saturday | 63°F | Patchy Fog | 8 to 13 mph NE | 12% |
| Saturday Night | 46°F | Mostly Cloudy | 12 mph E | 2% |
| Sunday | 62°F | Mostly Cloudy | 10 mph E | 7% |
| Sunday Night | 45°F | Partly Cloudy | 8 mph SE | 7% |
| Monday | 68°F | Mostly Sunny | 7 to 13 mph SE | 1% |
| Monday Night | 48°F | Mostly Clear | 12 mph SE | 1% |
| Tuesday | 69°F | Mostly Sunny | 13 to 18 mph SE | 1% |
| Tuesday Night | 51°F | Partly Cloudy | 14 mph SE | 4% |
| Wednesday | 73°F | Mostly Sunny | 13 mph S | 7% |
| Wednesday Night | 52°F | Mostly Clear | 8 mph S | 8% |
| Thursday | 75°F | Sunny | 8 mph S | 3% |
| Thursday Night | 53°F | Mostly Clear | 6 to 10 mph SE | 4% |
| Friday | 74°F | Mostly Sunny | 10 to 15 mph SE | 7% |
Forecast source: National Weather Service (api.weather.gov) for Portal (48.994, -102.548). Updated through the day.
Growing snapshot for Portal
Last spring frost
May 20
First fall frost
Sep 19
Growing season
121 days
Hardiness zone
3b
More local growing data for Portal: nearby ZIP 58772 weather · frost dates · planting calendar · North Dakota frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Northgate 5 Ese, Nd (21 mi from Portal). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.