Arcanum, OH Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Arcanum, a village in Darke County, Ohio.
Tonight
61°F
Mostly Cloudy then Rain Showers Likely
Rain showers likely after 3am. Mostly cloudy, with a low around 61. South wind 13 to 17 mph, with gusts as high as 28 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast for Arcanum
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 61°F | Mostly Cloudy then Rain Showers Likely | 13 to 17 mph S | 68% |
| Wednesday | 68°F | Rain Showers | 13 to 20 mph S | 98% |
| Wednesday Night | 49°F | Slight Chance Rain Showers then Mostly Cloudy | 7 to 12 mph SW | 16% |
| Thursday | 63°F | Mostly Sunny | 8 to 15 mph SW | 0% |
| Thursday Night | 44°F | Partly Cloudy | 3 to 9 mph W | 1% |
| Friday | 58°F | Partly Sunny | 3 to 10 mph NW | 14% |
| Friday Night | 38°F | Mostly Cloudy | 10 mph NW | 14% |
| Saturday | 53°F | Slight Chance Light Rain | 9 mph NW | 17% |
| Saturday Night | 33°F | Partly Cloudy | 6 mph W | 6% |
| Sunday | 56°F | Mostly Sunny | 5 to 12 mph W | 12% |
| Sunday Night | 34°F | Partly Cloudy | 7 to 10 mph W | 13% |
| Monday | 58°F | Sunny | 7 to 13 mph W | 14% |
| Monday Night | 37°F | Mostly Clear | 12 mph SW | 10% |
| Tuesday | 63°F | Sunny | 12 mph W | 3% |
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 Nov 4, 2026.