Napoleon, OH Weather & Growing Conditions
Tonight
56°F
Mostly Cloudy
Mostly cloudy. Low around 56, with temperatures rising to around 62 overnight. Northeast wind around 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 56°F | Mostly Cloudy | 5 mph NE | 6% |
| Saturday | 75°F | Showers And Thunderstorms Likely | 5 mph E | 65% |
| Saturday Night | 63°F | Chance Showers And Thunderstorms then Showers And Thunderstorms | 0 to 5 mph S | 80% |
| Sunday | 72°F | Showers And Thunderstorms | 5 to 15 mph NW | 89% |
| Sunday Night | 52°F | Chance Rain Showers | 10 to 15 mph NE | 50% |
| Monday | 65°F | Chance Rain Showers | 15 to 20 mph NE | 33% |
| Monday Night | 49°F | Slight Chance Rain Showers | 15 mph NE | 20% |
| Tuesday | 63°F | Mostly Cloudy then Slight Chance Rain Showers | 15 to 20 mph NE | 18% |
| Tuesday Night | 52°F | Chance Rain Showers | 15 to 20 mph NE | 36% |
| Wednesday | 65°F | Chance Rain Showers | 15 mph NE | 38% |
| Wednesday Night | 52°F | Slight Chance Rain Showers then Mostly Cloudy | 5 to 10 mph NE | 24% |
| Thursday | 67°F | Mostly Cloudy | 10 mph NE | 9% |
| Thursday Night | 51°F | Mostly Cloudy | 5 to 10 mph N | 9% |
| Friday | 69°F | Mostly Sunny | 5 to 10 mph N | 7% |
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 Sep 19, 2026.