Union City, GA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Union City, a city in Fulton County, Georgia.
Today
94°F
Sunny then Slight Chance Showers And Thunderstorms
A slight chance of showers and thunderstorms after 2pm. Sunny, with a high near 94. Heat index values as high as 100. Northeast wind 0 to 5 mph. Chance of precipitation is 20%.
7-day forecast for Union City
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 94°F | Sunny then Slight Chance Showers And Thunderstorms | 0 to 5 mph NE | 24% |
| Tonight | 71°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 to 5 mph SE | 30% |
| Sunday | 91°F | Mostly Sunny | 0 to 5 mph E | 13% |
| Sunday Night | 71°F | Mostly Clear | 0 mph | 11% |
| Monday | 92°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 0 to 5 mph W | 24% |
| Monday Night | 70°F | Chance Showers And Thunderstorms | 0 mph | 54% |
| Tuesday | 88°F | Showers And Thunderstorms Likely | 0 to 5 mph E | 61% |
| Tuesday Night | 69°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 5 mph E | 61% |
| Wednesday | 82°F | Chance Rain Showers then Chance Showers And Thunderstorms | 5 to 10 mph E | 39% |
| Wednesday Night | 65°F | Chance Showers And Thunderstorms then Partly Cloudy | 5 to 10 mph E | 34% |
| Thursday | 81°F | Mostly Sunny | 5 to 10 mph NE | 10% |
| Thursday Night | 63°F | Partly Cloudy | 5 to 10 mph NE | 10% |
| Friday | 81°F | Mostly Sunny | 5 mph N | 10% |
| Friday Night | 62°F | Partly Cloudy | 5 mph NE | 10% |
Forecast source: National Weather Service (api.weather.gov) for Union City (33.594, -84.563). Updated through the day.
Growing snapshot for Union City
Last spring frost
Mar 15
First fall frost
Nov 20
Growing season
252 days
Hardiness zone
8a
More local growing data for Union City: nearby ZIP 30291 weather · frost dates · planting calendar · Georgia frost dates
Nearby towns & communities
Alpharetta
Atlanta
Chattahoochee Hills
College Park
Duluth
East Point
Fairburn
Hapeville
Johns Creek
Milton
Mountain Park
Palmetto
Roswell
Sandy Springs
South Fulton
Climate data from the nearest NOAA station, Atlanta Hartsfield Intl Ap, Ga (7 mi from Union City). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.