Union City, TN Weather & Growing Conditions
This Afternoon
99°F
Sunny
Sunny, with a high near 99. Heat index values as high as 102. West southwest wind around 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 99°F | Sunny | 5 mph WSW | 1% |
| Tonight | 71°F | Mostly Clear | 0 to 5 mph SSW | 1% |
| Sunday | 98°F | Mostly Sunny | 0 to 10 mph WSW | 0% |
| Sunday Night | 71°F | Partly Cloudy | 0 to 5 mph ENE | 4% |
| Monday | 93°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 0 to 10 mph N | 24% |
| Monday Night | 65°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 5 to 10 mph NNE | 37% |
| Tuesday | 82°F | Chance Showers And Thunderstorms | 5 to 15 mph N | 30% |
| Tuesday Night | 60°F | Slight Chance Rain Showers then Partly Cloudy | 5 to 15 mph N | 15% |
| Wednesday | 80°F | Mostly Sunny | 5 to 10 mph N | 5% |
| Wednesday Night | 58°F | Mostly Clear | 5 to 10 mph NNE | 2% |
| Thursday | 80°F | Mostly Sunny | 5 to 10 mph NNE | 2% |
| Thursday Night | 58°F | Partly Cloudy | 0 to 10 mph NNE | 3% |
| Friday | 81°F | Mostly Sunny | 5 to 10 mph NNE | 4% |
| Friday Night | 58°F | Partly Cloudy | 5 to 10 mph NNE | 4% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Union City, TN
Last spring frost
Apr 3
First fall frost
Oct 29
Growing season
208 days
Hardiness zone
7b
Explore more for Union City, TN: full frost dates · planting calendar · Tennessee frost dates
Climate data from the nearest NOAA station, Union City, Tn (5.2 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.