Union City (GA) Temperature by Month
Union City, Georgia, United States of America has an average annual maximum temperature of 23°C (73°F), ranging from 12°C (54°F) in January to 32°C (90°F) in July. Below you'll find a full monthly breakdown and a comparison with cities worldwide.
Union City Monthly Temperatures
The climate in Union City is dynamic, ranging widely from chilly in winter to very warm in summer. Nights are significantly colder, with lows dropping from 21°C (70°F) in July to 0°C (32°F) in January.
The chart below illustrates the average maximum day and minimum night temperatures in Union City by month:
Daily lows are most common between 4 AM and 6 AM. By 3 PM temperatures reach their daily high, driven by peak solar heating. July, the warmest month of the year, receives 273 hours of sunshine.
The chart below shows the average temperature throughout the year:
Temperature: Union City vs the United States of America
The map below shows the annual temperature across the United States of America. You can also select individual months if you want to compare a specific time of year.
very warm
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pleasant
moderate
cold
very cold
Union City vs World: Temperature Compared
Union City's average annual maximum temperature is 23°C (73°F). To put that in context, here's how it compares to a few well-known destinations:
Lisbon, Portugal averages 21°C (70°F) annually — warm summers, mild winters, and rain mainly in the cooler months.
Reykjavík, Iceland averages 9°C (48°F) a year — mild summers by Icelandic standards, but cold winters and frequent wind.
Buenos Aires, Argentina averages 23°C (73°F) a year, with hot summers and mild winters — and seasons reversed compared to Europe.
Tokyo, Japan averages 21°C (70°F) a year, with hot summers, cool winters, and a well-defined cherry blossom spring.
What Does the Temperature Feel Like in Union City?
Temperature alone doesn't tell the whole story — humidity plays a big role in how warm or cold it actually feels. High humidity in summer makes the heat feel more intense, particularly once temperatures climb above 25°C. In winter, the same humidity can make cold air feel sharper than the thermometer suggests.
In the cooler months, when temperatures drop below 10°C, high humidity makes the cold feel more cutting than it would in dry conditions.
In Union City, January is the coolest month, with average highs of 12°C (54°F) and humidity around 67% — considered high. In July, the warmest month, temperatures average 32°C (90°F) with 74% humidity — conditions that feel high. For a full picture, see our humidity page.
Climate temperature data is typically calculated as a 30-year average. This smooths out year-to-year variability and gives a more reliable picture of what a place is actually like, rather than what happened in any single unusual year.
The readings come from a range of sources — land-based weather stations, ocean buoys, ships, and satellites. That data is collected by weather services around the world, then pooled, quality-checked, and averaged to produce the climate records you see here.
For cities and regions with significant elevation, altitude is one of the biggest factors shaping local temperatures. As a rule of thumb, temperatures fall by around 6°C for every 1,000 metres gained — so a city at 2,000 metres will typically be around 12°C cooler than a city at sea level in the same region. Higher ground also tends to see more dramatic day-to-night temperature swings, since thinner air loses heat faster after sunset.
For more on Union City's weather — including monthly rainfall, sunshine hours, and humidity — visit our Union City climate page.
