Napoleon, OH Weather & Growing Conditions
Overnight
55°F
Clear
Clear, with a low around 55. South wind around 0 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 55°F | Clear | 0 mph | 0% |
| Tuesday | 83°F | Sunny | 0 mph | 0% |
| Tuesday Night | 57°F | Mostly Clear | 0 mph | 0% |
| Wednesday | 86°F | Sunny | 0 to 5 mph W | 0% |
| Wednesday Night | 64°F | Partly Cloudy | 0 to 5 mph SW | 11% |
| Thursday | 84°F | Showers And Thunderstorms Likely | 0 to 5 mph SW | 60% |
| Thursday Night | 64°F | Showers And Thunderstorms Likely | 0 to 5 mph SW | 64% |
| Friday | 84°F | Chance Showers And Thunderstorms | 0 to 5 mph SW | 54% |
| Friday Night | 63°F | Chance Showers And Thunderstorms | 0 to 5 mph SW | 50% |
| Saturday | 85°F | Mostly Sunny | 0 to 5 mph SW | 12% |
| Saturday Night | 65°F | Partly Cloudy then Slight Chance Rain Showers | 5 mph SW | 21% |
| Sunday | 87°F | Slight Chance Rain Showers then Mostly Sunny | 5 to 15 mph SW | 21% |
| Sunday Night | 68°F | Chance Showers And Thunderstorms | 10 to 15 mph SW | 39% |
| Monday | 87°F | Chance Rain Showers | 10 mph SW | 39% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Napoleon, OH
Last spring frost
Apr 24
First fall frost
Oct 21
Growing season
179 days
Hardiness zone
6a
Explore more for Napoleon, OH: full frost dates · planting calendar · Ohio frost dates
Climate data from the nearest NOAA station, Napoleon, Oh (0.7 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.