Knox, ND Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Knox, a city in Benson County, North Dakota.
Overnight
52°F
Patchy Fog
Patchy fog. Mostly cloudy. Low around 52, with temperatures rising to around 54 overnight. South southeast wind around 5 mph.
7-day forecast for Knox
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 52°F | Patchy Fog | 5 mph SSE | 6% |
| Saturday | 67°F | Patchy Fog then Cloudy | 1 to 15 mph ENE | 20% |
| Saturday Night | 45°F | Mostly Cloudy | 10 to 14 mph NE | 2% |
| Sunday | 64°F | Mostly Cloudy | 8 to 12 mph E | 4% |
| Sunday Night | 44°F | Mostly Cloudy | 5 to 8 mph ESE | 4% |
| Monday | 67°F | Sunny | 5 to 10 mph SE | 2% |
| Monday Night | 44°F | Mostly Clear | 9 mph SSE | 0% |
| Tuesday | 68°F | Mostly Sunny | 9 to 21 mph SSE | 1% |
| Tuesday Night | 49°F | Partly Cloudy | 16 mph SSE | 6% |
| Wednesday | 70°F | Partly Sunny | 15 to 18 mph SSE | 12% |
| Wednesday Night | 52°F | Partly Cloudy | 9 to 14 mph SSE | 14% |
| Thursday | 73°F | Mostly Sunny | 8 to 12 mph SSE | 14% |
| Thursday Night | 53°F | Mostly Clear | 9 mph SSE | 10% |
| Friday | 73°F | Mostly Sunny | 9 to 17 mph SSE | 8% |
Forecast source: National Weather Service (api.weather.gov) for Knox (48.344, -99.691). Updated through the day.
Growing snapshot for Knox
Last spring frost
May 11
First fall frost
Sep 28
Growing season
138 days
Hardiness zone
4a
More local growing data for Knox: nearby ZIP 58343 weather · frost dates · planting calendar · North Dakota frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Esmond 9 Nnw, Nd (10.6 mi from Knox). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.