Union City, OH Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Union City, a village in Darke County, Ohio.
This Afternoon
75°F
Sunny
Sunny, with a high near 75. South wind around 14 mph.
7-day forecast for Union City
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 75°F | Sunny | 14 mph S | 2% |
| Tonight | 62°F | Mostly Cloudy then Rain Showers | 13 to 17 mph SE | 78% |
| Wednesday | 69°F | Rain Showers | 13 to 18 mph S | 95% |
| Wednesday Night | 48°F | Slight Chance Rain Showers then Mostly Cloudy | 7 to 12 mph SW | 21% |
| Thursday | 63°F | Mostly Sunny | 8 to 15 mph SW | 0% |
| Thursday Night | 45°F | Mostly Cloudy | 3 to 8 mph W | 1% |
| Friday | 57°F | Slight Chance Light Rain | 3 to 10 mph NW | 21% |
| Friday Night | 38°F | Slight Chance Light Rain | 9 mph NW | 21% |
| Saturday | 53°F | Slight Chance Light Rain then Partly Sunny | 8 mph NW | 15% |
| Saturday Night | 33°F | Partly Cloudy | 5 mph W | 4% |
| Sunday | 56°F | Mostly Sunny | 3 to 12 mph W | 12% |
| Sunday Night | 34°F | Partly Cloudy | 6 to 9 mph W | 12% |
| Monday | 59°F | Sunny | 6 to 12 mph W | 13% |
| Monday Night | 38°F | Mostly Clear | 10 mph SW | 10% |
Forecast source: National Weather Service (api.weather.gov) for Union City (40.199, -84.789). Updated through the day.
Growing snapshot for Union City
Last spring frost
Apr 20
First fall frost
Oct 21
Growing season
183 days
Hardiness zone
6a
More local growing data for Union City: nearby ZIP 45390 weather · frost dates · planting calendar · Ohio frost dates
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Wayne Lakes
Yorkshire
Climate data from the nearest NOAA station, Winchester Airport 3 E, In (9 mi from Union City). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.