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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

WhenTempForecastWindPrecip
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

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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.