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
87°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms between 9am and 2pm, then showers and thunderstorms likely between 2pm and 5pm, then showers and thunderstorms likely. Mostly sunny. High near 87, with temperatures falling to around 83 in the afternoon. Southwest wind 0 to 5 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for Union City
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 87°F | Chance Showers And Thunderstorms | 0 to 5 mph SW | 64% |
| Tonight | 70°F | Showers And Thunderstorms Likely | 0 to 5 mph E | 56% |
| Wednesday | 87°F | Showers And Thunderstorms Likely | 0 to 5 mph SE | 73% |
| Wednesday Night | 71°F | Chance Showers And Thunderstorms | 0 to 5 mph S | 29% |
| Thursday | 89°F | Showers And Thunderstorms Likely | 0 to 5 mph S | 60% |
| Thursday Night | 71°F | Showers And Thunderstorms Likely | 0 mph | 60% |
| Friday | 89°F | Chance Showers And Thunderstorms | 0 to 5 mph SE | 32% |
| Friday Night | 71°F | Chance Showers And Thunderstorms | 0 to 5 mph SE | 32% |
| Saturday | 89°F | Chance Showers And Thunderstorms | 0 to 5 mph SE | 38% |
| Saturday Night | 72°F | Chance Showers And Thunderstorms | 0 mph | 38% |
| Sunday | 89°F | Chance Showers And Thunderstorms | 0 to 5 mph S | 44% |
| Sunday Night | 72°F | Chance Showers And Thunderstorms | 0 mph | 44% |
| Monday | 89°F | Chance Showers And Thunderstorms | 0 to 5 mph SW | 42% |
| Monday Night | 72°F | Chance Showers And Thunderstorms | 0 mph | 42% |
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 Aug 4, 2026.