Napoleon, ND Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Napoleon, a city in Logan County, North Dakota.
Tonight
31°F
Patchy Fog
Patchy fog. Mostly cloudy. Low around 31, with temperatures rising to around 33 overnight. Northwest wind 12 to 17 mph.
7-day forecast for Napoleon
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 31°F | Patchy Fog | 12 to 17 mph NW | 0% |
| Wednesday | 45°F | Patchy Fog then Mostly Cloudy | 14 to 20 mph NW | 0% |
| Wednesday Night | 28°F | Mostly Cloudy | 9 to 15 mph N | 0% |
| Thursday | 41°F | Mostly Sunny | 6 to 12 mph N | 0% |
| Thursday Night | 25°F | Partly Cloudy | 7 mph SE | 0% |
| Friday | 46°F | Mostly Sunny | 7 to 12 mph SW | 0% |
| Friday Night | 30°F | Partly Cloudy | 7 to 10 mph SW | 0% |
| Saturday | 54°F | Mostly Sunny | 10 to 18 mph W | 4% |
| Saturday Night | 32°F | Mostly Clear | 6 to 12 mph W | 2% |
| Sunday | 56°F | Sunny | 6 to 14 mph SW | 1% |
| Sunday Night | 38°F | Partly Cloudy | 12 to 15 mph SW | 0% |
| Monday | 55°F | Mostly Sunny | 13 to 21 mph W | 0% |
| Monday Night | 33°F | Partly Cloudy | 6 to 9 mph W | 0% |
| Tuesday | 53°F | Mostly Sunny | 6 to 14 mph W | 0% |
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 Nov 4, 2026.