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
71°F
Mostly Clear
Mostly clear, with a low around 71. Wind around 0 mph.
7-day forecast for Union City
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 71°F | Mostly Clear | 0 mph | 1% |
| Saturday | 99°F | Sunny | 0 to 5 mph WSW | 2% |
| Saturday Night | 72°F | Mostly Clear | 0 mph | 0% |
| Sunday | 99°F | Sunny | 0 to 10 mph WSW | 0% |
| Sunday Night | 72°F | Partly Cloudy | 0 to 5 mph NNE | 2% |
| Monday | 95°F | Mostly Sunny then Chance Showers And Thunderstorms | 0 to 10 mph NNW | 26% |
| Monday Night | 67°F | Chance Showers And Thunderstorms | 5 mph N | 32% |
| Tuesday | 85°F | Slight Chance Showers And Thunderstorms | 5 to 15 mph N | 24% |
| Tuesday Night | 61°F | Slight Chance Rain Showers then Partly Cloudy | 5 to 15 mph N | 17% |
| Wednesday | 82°F | Mostly Sunny | 5 to 10 mph N | 7% |
| Wednesday Night | 59°F | Mostly Clear | 5 to 10 mph NNE | 6% |
| Thursday | 82°F | Sunny | 5 to 10 mph NNE | 6% |
| Thursday Night | 60°F | Partly Cloudy | 5 mph NNE | 6% |
| Friday | 81°F | Mostly Sunny | 5 to 10 mph NNE | 6% |
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 Sep 19, 2026.