Grafton, ND Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Grafton, a city in Walsh County, North Dakota.
Today
69°F
Patchy Fog then Slight Chance Rain Showers
Patchy fog before 10am, then a slight chance of rain showers between 1pm and 3pm. Mostly cloudy. High near 69, with temperatures falling to around 67 in the afternoon. North northwest wind 0 to 16 mph. Chance of precipitation is 20%.
7-day forecast for Grafton
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 69°F | Patchy Fog then Slight Chance Rain Showers | 0 to 16 mph NNW | 20% |
| Tonight | 45°F | Partly Cloudy | 8 to 16 mph NNE | 0% |
| Sunday | 66°F | Mostly Cloudy | 9 mph NE | 0% |
| Sunday Night | 41°F | Partly Cloudy | 1 to 8 mph E | 0% |
| Monday | 69°F | Sunny | 1 to 8 mph SE | 0% |
| Monday Night | 41°F | Mostly Clear | 8 mph SSE | 0% |
| Tuesday | 69°F | Sunny | 8 to 20 mph SSE | 0% |
| Tuesday Night | 46°F | Mostly Clear | 16 mph SSE | 1% |
| Wednesday | 71°F | Mostly Sunny | 15 to 22 mph SSE | 7% |
| Wednesday Night | 50°F | Partly Cloudy | 12 to 16 mph SSE | 12% |
| Thursday | 73°F | Partly Sunny | 10 to 16 mph SSE | 12% |
| Thursday Night | 53°F | Partly Cloudy | 13 mph SSE | 12% |
| Friday | 75°F | Mostly Sunny | 10 to 21 mph S | 8% |
| Friday Night | 55°F | Mostly Cloudy then Slight Chance Rain Showers | 17 mph S | 15% |
Forecast source: National Weather Service (api.weather.gov) for Grafton (48.414, -97.406). Updated through the day.
Growing snapshot for Grafton
Last spring frost
May 4
First fall frost
Oct 7
Growing season
156 days
Hardiness zone
4a
More local growing data for Grafton: nearby ZIP 58237 weather · frost dates · planting calendar · North Dakota frost dates
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Climate data from the nearest NOAA station, Grafton, Nd (1.1 mi from Grafton). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.