Union City, TN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Union City, a city in Obion County, Tennessee.
Today
87°F
Sunny
Sunny, with a high near 87. North northeast wind 0 to 5 mph.
7-day forecast for Union City
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 87°F | Sunny | 0 to 5 mph NNE | 0% |
| Tonight | 67°F | Mostly Clear | 0 to 5 mph NE | 0% |
| Wednesday | 90°F | Sunny | 0 mph | 0% |
| Wednesday Night | 69°F | Mostly Clear | 0 mph | 0% |
| Thursday | 91°F | Mostly Sunny | 0 to 5 mph SSW | 5% |
| Thursday Night | 72°F | Partly Cloudy | 0 to 5 mph S | 13% |
| Friday | 90°F | Chance Showers And Thunderstorms | 0 to 5 mph SSW | 33% |
| Friday Night | 71°F | Chance Showers And Thunderstorms | 0 to 5 mph S | 29% |
| Saturday | 90°F | Chance Showers And Thunderstorms | 0 to 5 mph SW | 33% |
| Saturday Night | 71°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 to 5 mph S | 33% |
| Sunday | 91°F | Mostly Sunny | 0 to 5 mph SSW | 13% |
| Sunday Night | 72°F | Mostly Clear | 0 to 5 mph S | 13% |
| Monday | 92°F | Sunny | 5 mph SSW | 7% |
| Monday Night | 73°F | Partly Cloudy | 0 to 5 mph SSW | 7% |
Forecast source: National Weather Service (api.weather.gov) for Union City (36.427, -89.048). Updated through the day.
Growing snapshot for Union City
Last spring frost
Apr 3
First fall frost
Oct 29
Growing season
208 days
Hardiness zone
7b
More local growing data for Union City: nearby ZIP 38261 weather · frost dates · planting calendar · Tennessee frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Union City, Tn (5.2 mi from Union City). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.