Arcanum, OH Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Arcanum, a village in Darke County, Ohio.
Tonight
57°F
Partly Cloudy
Partly cloudy, with a low around 57. East wind 6 to 9 mph.
7-day forecast for Arcanum
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 57°F | Partly Cloudy | 6 to 9 mph E | 3% |
| Saturday | 80°F | Showers And Thunderstorms Likely | 8 mph SE | 59% |
| Saturday Night | 65°F | Showers And Thunderstorms Likely | 8 mph S | 69% |
| Sunday | 80°F | Showers And Thunderstorms Likely | 8 mph W | 56% |
| Sunday Night | 59°F | Showers And Thunderstorms Likely | 10 to 14 mph NE | 56% |
| Monday | 70°F | Showers And Thunderstorms Likely | 10 to 15 mph NE | 57% |
| Monday Night | 55°F | Chance Showers And Thunderstorms | 12 to 16 mph NE | 49% |
| Tuesday | 69°F | Chance Showers And Thunderstorms | 14 mph NE | 35% |
| Tuesday Night | 56°F | Chance Showers And Thunderstorms | 8 to 15 mph NE | 29% |
| Wednesday | 69°F | Slight Chance Rain Showers | 10 mph N | 23% |
| Wednesday Night | 55°F | Slight Chance Rain Showers | 7 to 12 mph N | 15% |
| Thursday | 70°F | Partly Sunny | 10 mph N | 11% |
| Thursday Night | 54°F | Mostly Cloudy | 6 to 10 mph N | 10% |
| Friday | 70°F | Partly Sunny | 7 to 10 mph N | 6% |
Forecast source: National Weather Service (api.weather.gov) for Arcanum (39.992, -84.554). Updated through the day.
Growing snapshot for Arcanum
Last spring frost
Apr 21
First fall frost
Oct 20
Growing season
180 days
Hardiness zone
6a
More local growing data for Arcanum: nearby ZIP 45304 weather · frost dates · planting calendar · Ohio frost dates
Nearby towns & communities
Ansonia
Bradford
Gettysburg
Greenville
Hollansburg
Ithaca
New Madison
New Weston
North Star
Osgood
Palestine
Pitsburg
Rossburg
Union City
Versailles
Wayne Lakes
Yorkshire
Climate data from the nearest NOAA station, Greenville Wtp, Oh (10.7 mi from Arcanum). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.