Harman US

Calvin, ND Weather & Growing Conditions

Today
66°F
Patchy Fog then Mostly Cloudy
Patchy fog and a slight chance of rain showers before 11am. Mostly cloudy. High near 66, with temperatures falling to around 64 in the afternoon. North wind 2 to 16 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.

7-day forecast

WhenTempForecastWindPrecip
Today 66°F Patchy Fog then Mostly Cloudy 2 to 16 mph N 23%
Tonight 42°F Partly Cloudy 8 to 15 mph NE 0%
Sunday 63°F Mostly Cloudy 9 mph ENE 0%
Sunday Night 38°F Partly Cloudy 7 mph ESE 0%
Monday 67°F Sunny 3 to 9 mph SSE 0%
Monday Night 41°F Mostly Clear 7 to 10 mph SSE 0%
Tuesday 67°F Sunny 10 to 22 mph S 0%
Tuesday Night 47°F Mostly Clear 15 to 18 mph SSE 4%
Wednesday 69°F Mostly Sunny 17 to 21 mph S 5%
Wednesday Night 50°F Partly Cloudy 13 to 16 mph SSE 12%
Thursday 71°F Mostly Sunny 12 to 16 mph SSE 12%
Thursday Night 52°F Partly Cloudy 13 mph S 9%
Friday 72°F Partly Sunny 13 to 21 mph S 9%
Friday Night 53°F Mostly Cloudy then Slight Chance Rain Showers 16 to 20 mph S 16%

Forecast source: National Weather Service (api.weather.gov). Updated through the day.

Growing snapshot for Calvin, ND

Last spring frost
May 18
First fall frost
Sep 23
Growing season
127 days
Hardiness zone
3b

Explore more for Calvin, ND: full frost dates · planting calendar · North Dakota frost dates

Climate data from the nearest NOAA station, Hansboro 4 Nne, Nd (22.1 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.