Union City, TN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Union City, a city in Obion County, Tennessee.
Overnight
57°F
Rain Showers Likely
Rain showers likely before 4am. Mostly cloudy. Low around 57, with temperatures rising to around 60 overnight. South wind 5 to 10 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast for Union City
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 57°F | Rain Showers Likely | 5 to 10 mph S | 58% |
| Wednesday | 69°F | Partly Sunny | 5 to 10 mph WSW | 9% |
| Wednesday Night | 42°F | Partly Cloudy | 0 to 5 mph WSW | 0% |
| Thursday | 69°F | Sunny | 0 to 5 mph WSW | 0% |
| Thursday Night | 44°F | Partly Cloudy | 0 mph | 1% |
| Friday | 63°F | Partly Sunny | 0 to 10 mph N | 2% |
| Friday Night | 38°F | Partly Cloudy | 0 to 5 mph N | 1% |
| Saturday | 59°F | Mostly Sunny | 0 to 5 mph N | 0% |
| Saturday Night | 34°F | Mostly Cloudy | 0 mph | 1% |
| Sunday | 61°F | Mostly Sunny | 0 to 5 mph NW | 6% |
| Sunday Night | 32°F | Mostly Clear | 0 to 5 mph NW | 5% |
| Monday | 64°F | Sunny | 0 to 5 mph WNW | 1% |
| Monday Night | 35°F | Mostly Clear | 0 mph | 0% |
| Tuesday | 68°F | Sunny | 0 to 5 mph SW | 0% |
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 Nov 4, 2026.