Napoleon, ND Weather & Growing Conditions
This Afternoon
66°F
Mostly Cloudy
Mostly cloudy. High near 66, with temperatures falling to around 60 in the afternoon. Northeast wind around 9 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 66°F | Mostly Cloudy | 9 mph NE | 3% |
| Tonight | 53°F | Chance Rain Showers | 8 to 15 mph NE | 31% |
| Sunday | 61°F | Slight Chance Rain Showers | 12 to 15 mph E | 19% |
| Sunday Night | 47°F | Cloudy | 7 to 10 mph E | 14% |
| Monday | 64°F | Mostly Sunny | 7 to 10 mph E | 3% |
| Monday Night | 44°F | Partly Cloudy | 7 to 10 mph SE | 3% |
| Tuesday | 64°F | Mostly Sunny | 10 to 21 mph SE | 1% |
| Tuesday Night | 49°F | Partly Cloudy | 17 to 22 mph SE | 4% |
| Wednesday | 67°F | Partly Sunny then Chance Showers And Thunderstorms | 22 to 25 mph SE | 26% |
| Wednesday Night | 52°F | Showers And Thunderstorms Likely | 15 to 23 mph SE | 59% |
| Thursday | 72°F | Chance Showers And Thunderstorms | 8 to 14 mph SE | 47% |
| Thursday Night | 53°F | Partly Cloudy | 6 to 9 mph SE | 6% |
| Friday | 74°F | Mostly Sunny | 9 to 21 mph SE | 6% |
| Friday Night | 56°F | Partly Cloudy then Slight Chance Rain Showers | 18 to 22 mph SE | 16% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Napoleon, ND
Last spring frost
May 13
First fall frost
Sep 28
Growing season
136 days
Hardiness zone
4a
Explore more for Napoleon, ND: full frost dates · planting calendar · North Dakota frost dates
Climate data from the nearest NOAA station, Napoleon, Nd (8.5 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.