Napoleon, ND Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Napoleon, a city in Logan County, North Dakota.
This Afternoon
65°F
Patchy Drizzle
Patchy drizzle before 5pm. Cloudy. High near 65, with temperatures falling to around 60 in the afternoon. East wind around 10 mph, with gusts as high as 20 mph.
7-day forecast for Napoleon
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 65°F | Patchy Drizzle | 10 mph E | 10% |
| Tonight | 53°F | Patchy Fog | 5 to 10 mph E | 2% |
| Saturday | 66°F | Patchy Fog then Mostly Cloudy | 6 to 14 mph NE | 7% |
| Saturday Night | 51°F | Slight Chance Rain Showers | 14 mph NE | 15% |
| Sunday | 62°F | Cloudy then Slight Chance Rain Showers | 16 mph E | 17% |
| Sunday Night | 48°F | Slight Chance Rain Showers | 7 to 12 mph E | 20% |
| Monday | 64°F | Slight Chance Rain Showers then Partly Sunny | 7 to 13 mph E | 18% |
| Monday Night | 47°F | Mostly Cloudy | 12 mph SE | 5% |
| Tuesday | 66°F | Partly Sunny | 12 to 23 mph SE | 5% |
| Tuesday Night | 51°F | Mostly Cloudy | 16 to 20 mph SE | 11% |
| Wednesday | 70°F | Partly Sunny then Slight Chance Rain Showers | 22 mph SE | 18% |
| Wednesday Night | 52°F | Slight Chance Rain Showers | 9 to 18 mph SE | 24% |
| Thursday | 72°F | Slight Chance Rain Showers then Mostly Sunny | 9 to 13 mph SE | 19% |
| Thursday Night | 53°F | Mostly Clear | 12 mph SE | 7% |
Forecast source: National Weather Service (api.weather.gov) for Napoleon (46.504, -99.768). Updated through the day.
Growing snapshot for Napoleon
Last spring frost
May 13
First fall frost
Sep 28
Growing season
136 days
Hardiness zone
4a
More local growing data for Napoleon: nearby ZIP 58561 weather · frost dates · planting calendar · North Dakota frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Napoleon, Nd (5.1 mi from Napoleon). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.