Union, KY Weather & Growing Conditions
Today
89°F
Mostly Cloudy then Chance Showers And Thunderstorms
A chance of showers and thunderstorms between 3pm and 5pm, then showers and thunderstorms likely. Mostly cloudy, with a high near 89. South wind around 7 mph. Chance of precipitation is 60%. New rainfall amounts between a half and three quarters of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 89°F | Mostly Cloudy then Chance Showers And Thunderstorms | 7 mph S | 58% |
| Tonight | 69°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 6 mph S | 71% |
| Sunday | 90°F | Mostly Sunny then Slight Chance Rain Showers | 5 to 9 mph SW | 20% |
| Sunday Night | 63°F | Chance Showers And Thunderstorms | 9 mph N | 46% |
| Monday | 76°F | Chance Rain Showers | 10 mph NE | 42% |
| Monday Night | 58°F | Chance Showers And Thunderstorms | 7 to 12 mph NE | 48% |
| Tuesday | 72°F | Chance Showers And Thunderstorms | 8 mph NE | 34% |
| Tuesday Night | 59°F | Slight Chance Showers And Thunderstorms | 5 to 9 mph NE | 39% |
| Wednesday | 72°F | Chance Showers And Thunderstorms | 6 mph N | 44% |
| Wednesday Night | 57°F | Chance Showers And Thunderstorms | 3 to 7 mph N | 44% |
| Thursday | 72°F | Partly Sunny | 7 mph N | 13% |
| Thursday Night | 56°F | Mostly Cloudy | 7 mph N | 13% |
| Friday | 72°F | Mostly Sunny | 5 to 8 mph NE | 5% |
| Friday Night | 54°F | Partly Cloudy | 7 mph NE | 3% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Union, KY
Last spring frost
Apr 18
First fall frost
Oct 25
Growing season
188 days
Hardiness zone
6b
Explore more for Union, KY: full frost dates · planting calendar · Kentucky frost dates
Climate data from the nearest NOAA station, Cincinnati Northern Ky Ap, Ky (9.8 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.