Harman US

Calvin, ND Weather & Growing Conditions

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

Today
66°F
Slight Chance Rain Showers then Partly Sunny
A slight chance of rain showers before 11am. Partly sunny. High near 66, with temperatures falling to around 64 in the afternoon. North northeast wind 10 to 16 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.

7-day forecast for Calvin

WhenTempForecastWindPrecip
Today 66°F Slight Chance Rain Showers then Partly Sunny 10 to 16 mph NNE 20%
Tonight 41°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 68°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 14 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) for Calvin (48.852, -98.938). Updated through the day.

Growing snapshot for Calvin

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

More local growing data for Calvin: nearby ZIP 58323 weather · frost dates · planting calendar · North Dakota frost dates

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