Harman US

Arthur, ND Weather & Growing Conditions

Local forecast, frost dates, hardiness zone and planting guidance for Arthur, a city in Cass County, North Dakota.

This Afternoon
48°F
Slight Chance Drizzle
A slight chance of drizzle. Cloudy. High near 48, with temperatures falling to around 43 in the afternoon. North wind around 22 mph, with gusts as high as 36 mph.

7-day forecast for Arthur

WhenTempForecastWindPrecip
This Afternoon 48°F Slight Chance Drizzle 22 mph N 11%
Tonight 36°F Chance Light Rain 17 to 23 mph N 26%
Wednesday 46°F Slight Chance Light Rain then Cloudy 23 to 26 mph N 24%
Wednesday Night 30°F Mostly Cloudy 18 to 22 mph N 0%
Thursday 39°F Mostly Cloudy 10 to 22 mph N 0%
Thursday Night 24°F Mostly Cloudy 2 to 8 mph ENE 0%
Friday 43°F Mostly Sunny 2 to 13 mph S 0%
Friday Night 27°F Partly Cloudy 9 mph SSW 0%
Saturday 54°F Mostly Sunny 10 to 16 mph WSW 10%
Saturday Night 32°F Partly Cloudy 12 mph WNW 5%
Sunday 54°F Mostly Sunny 12 mph SW 2%
Sunday Night 35°F Partly Cloudy 12 mph SSW 0%
Monday 57°F Mostly Sunny 13 to 24 mph W 1%
Monday Night 33°F Mostly Clear 7 to 13 mph WNW 0%

Forecast source: National Weather Service (api.weather.gov) for Arthur (47.104, -97.218). Updated through the day.

Growing snapshot for Arthur

Last spring frost
May 9
First fall frost
Oct 1
Growing season
143 days
Hardiness zone
4a

More local growing data for Arthur: nearby ZIP 58006 weather · frost dates · planting calendar · North Dakota frost dates

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Climate data from the nearest NOAA station, Casselton Agronomy Farm, Nd (15.3 mi from Arthur). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.