Knox, ND Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Knox, a city in Benson County, North Dakota.
Today
67°F
Slight Chance Rain Showers then Mostly Cloudy
A slight chance of rain showers before 11am. Mostly cloudy, with a high near 67. Northeast wind 5 to 16 mph. Chance of precipitation is 20%.
7-day forecast for Knox
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 67°F | Slight Chance Rain Showers then Mostly Cloudy | 5 to 16 mph NE | 15% |
| Tonight | 44°F | Mostly Cloudy | 10 to 15 mph NE | 0% |
| Sunday | 63°F | Mostly Cloudy | 8 to 12 mph E | 0% |
| Sunday Night | 41°F | Partly Cloudy | 5 to 8 mph ESE | 0% |
| Monday | 67°F | Sunny | 5 to 10 mph SE | 0% |
| Monday Night | 43°F | Mostly Clear | 9 mph SSE | 0% |
| Tuesday | 68°F | Mostly Sunny | 9 to 21 mph SSE | 1% |
| Tuesday Night | 48°F | Partly Cloudy | 16 mph SSE | 6% |
| Wednesday | 70°F | Partly Sunny | 18 mph SSE | 6% |
| Wednesday Night | 52°F | Partly Cloudy | 10 to 16 mph SSE | 12% |
| Thursday | 73°F | Mostly Sunny | 9 to 13 mph SSE | 12% |
| Thursday Night | 53°F | Partly Cloudy | 12 mph SSE | 9% |
| Friday | 73°F | Mostly Sunny | 10 to 20 mph SSE | 9% |
| Friday Night | 54°F | Mostly Cloudy then Slight Chance Rain Showers | 17 mph SSE | 21% |
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.