Napoleon, ND Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Napoleon, a city in Logan County, North Dakota.
Today
73°F
Sunny
Sunny, with a high near 73. Northwest wind 7 to 17 mph, with gusts as high as 26 mph.
7-day forecast for Napoleon
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 73°F | Sunny | 7 to 17 mph NW | 0% |
| Tonight | 49°F | Mostly Clear | 3 to 15 mph SW | 1% |
| Wednesday | 81°F | Sunny | 6 to 15 mph SW | 0% |
| Wednesday Night | 55°F | Partly Cloudy | 7 to 13 mph SW | 1% |
| Thursday | 86°F | Sunny | 9 to 14 mph W | 0% |
| Thursday Night | 58°F | Mostly Clear | 6 to 12 mph E | 1% |
| Friday | 84°F | Sunny | 12 to 16 mph NW | 1% |
| Friday Night | 57°F | Mostly Clear | 8 to 12 mph E | 2% |
| Saturday | 86°F | Mostly Sunny | 12 to 17 mph E | 3% |
| Saturday Night | 57°F | Mostly Clear | 10 to 15 mph E | 5% |
| Sunday | 84°F | Mostly Sunny | 10 to 16 mph E | 8% |
| Sunday Night | 59°F | Chance Showers And Thunderstorms | 15 mph E | 30% |
| Monday | 82°F | Chance Rain Showers | 15 to 18 mph NE | 30% |
| Monday Night | 58°F | Slight Chance Rain Showers | 12 to 17 mph E | 23% |
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 Aug 4, 2026.