Knox, ND Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Knox, a city in Benson County, North Dakota.
This Afternoon
54°F
Mostly Sunny
Mostly sunny. High near 54, with temperatures falling to around 49 in the afternoon. North wind around 13 mph.
7-day forecast for Knox
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 54°F | Mostly Sunny | 13 mph N | 0% |
| Tonight | 27°F | Mostly Cloudy then Patchy Fog | 9 to 13 mph N | 0% |
| Thursday | 38°F | Patchy Fog then Mostly Cloudy | 3 to 12 mph ENE | 0% |
| Thursday Night | 22°F | Partly Cloudy | 3 to 9 mph SSE | 0% |
| Friday | 48°F | Mostly Sunny | 12 mph SSW | 0% |
| Friday Night | 29°F | Partly Cloudy | 8 mph SSW | 0% |
| Saturday | 54°F | Mostly Sunny | 9 to 18 mph WSW | 1% |
| Saturday Night | 29°F | Mostly Clear | 3 to 12 mph W | 0% |
| Sunday | 54°F | Sunny | 3 to 12 mph SW | 0% |
| Sunday Night | 37°F | Partly Cloudy | 12 mph SW | 0% |
| Monday | 54°F | Mostly Sunny | 13 to 20 mph WNW | 0% |
| Monday Night | 29°F | Partly Cloudy | 5 to 10 mph W | 1% |
| Tuesday | 51°F | Mostly Sunny | 5 to 9 mph WSW | 1% |
| Tuesday Night | 31°F | Partly Cloudy | 6 mph SSW | 1% |
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 Nov 4, 2026.