Knox, ND Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Knox, a city in Benson County, North Dakota.
Overnight
47°F
Mostly Clear
Mostly clear, with a low around 47. West northwest wind 8 to 12 mph.
7-day forecast for Knox
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 47°F | Mostly Clear | 8 to 12 mph WNW | 0% |
| Tuesday | 70°F | Sunny | 10 to 17 mph WNW | 0% |
| Tuesday Night | 48°F | Mostly Clear | 5 to 15 mph WSW | 0% |
| Wednesday | 79°F | Mostly Sunny | 8 to 20 mph WSW | 3% |
| Wednesday Night | 53°F | Partly Cloudy | 7 to 17 mph WSW | 14% |
| Thursday | 82°F | Sunny | 7 to 15 mph W | 3% |
| Thursday Night | 55°F | Mostly Clear | 6 to 13 mph W | 0% |
| Friday | 79°F | Sunny | 8 to 13 mph NW | 0% |
| Friday Night | 53°F | Mostly Clear | 5 to 13 mph NNE | 5% |
| Saturday | 79°F | Mostly Sunny | 5 to 12 mph NE | 5% |
| Saturday Night | 53°F | Mostly Clear | 6 to 13 mph NE | 10% |
| Sunday | 76°F | Mostly Sunny | 6 to 12 mph NNE | 10% |
| Sunday Night | 55°F | Chance Rain Showers | 8 to 13 mph ENE | 34% |
| Monday | 76°F | Chance Rain Showers | 8 to 12 mph NE | 34% |
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 Aug 4, 2026.