Mandan, ND Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Mandan, a city in Morton County, North Dakota.
Tonight
55°F
Patchy Fog
Patchy fog after 10pm. Cloudy. Low around 55, with temperatures rising to around 57 overnight. East wind 2 to 9 mph.
7-day forecast for Mandan
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 55°F | Patchy Fog | 2 to 9 mph E | 3% |
| Saturday | 67°F | Patchy Fog then Slight Chance Rain Showers | 2 to 9 mph E | 24% |
| Saturday Night | 52°F | Chance Rain Showers | 10 mph NE | 30% |
| Sunday | 63°F | Chance Rain Showers | 10 mph E | 46% |
| Sunday Night | 50°F | Chance Rain Showers | 5 to 8 mph E | 46% |
| Monday | 67°F | Slight Chance Rain Showers then Partly Sunny | 3 to 9 mph SE | 16% |
| Monday Night | 49°F | Partly Cloudy | 8 mph SE | 4% |
| Tuesday | 70°F | Partly Sunny | 8 to 17 mph SE | 4% |
| Tuesday Night | 53°F | Mostly Cloudy | 15 mph SE | 12% |
| Wednesday | 74°F | Partly Sunny | 15 mph SE | 12% |
| Wednesday Night | 54°F | Slight Chance Rain Showers | 5 to 13 mph SE | 19% |
| Thursday | 77°F | Mostly Sunny | 5 to 9 mph SE | 11% |
| Thursday Night | 54°F | Mostly Clear | 8 mph SE | 6% |
| Friday | 76°F | Mostly Sunny | 7 to 15 mph SE | 7% |
Forecast source: National Weather Service (api.weather.gov) for Mandan (46.829, -100.887). Updated through the day.
Growing snapshot for Mandan
Last spring frost
May 13
First fall frost
Sep 27
Growing season
136 days
Hardiness zone
4a
More local growing data for Mandan: nearby ZIP 58554 weather · frost dates · planting calendar · North Dakota frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Mandan Exp Stn, Nd (4.4 mi from Mandan). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.