Similar Climates › City Pairings › Atlanta ≈ Porto Alegre
City Pairings
fair match
Atlanta, Georgia and Porto Alegre, Brazil are a fair climate match — 7,901 km (4,909 mi) apart. Atlanta is Köppen zone Cfa; Porto Alegre is Cfa.
See Atlanta on the interactive map →Atlanta and Porto Alegre both sit in the humid subtropical (Cfa) zone, so their seasonal arcs line up. Because one city is in the opposite hemisphere, the comparison flips seasons: Atlanta’s January against Porto Alegre’s July. They are about 7,901 km (4,909 mi) apart, so Porto Alegre is a reachable stand-in when you want Atlanta’s weather elsewhere.
It is a fair match — close on the main numbers, with a few seasonal quirks between Atlanta and Porto Alegre. January means differ by 8°C (Porto Alegre warmer); July by 1°C (Porto Alegre cooler). Rainfall shifts more: Porto Alegre is 21 mm wetter in January.
Sunshine stays close: Porto Alegre at 9.1 h/day on average versus 8.9 h/day in Atlanta (January 7.1 h / 6.7 h, July 11 h / 11.2 h). PM2.5 averages stay near each other (10 µg/m³ in Porto Alegre, 13 in Atlanta). Humidity: dew point in Porto Alegre runs about 11°C higher in January (11°C vs 0°C), so the air feels muggier.
January & July · °C and mm
Porto Alegre is in the southern hemisphere, so its July lines up with Atlanta's January — the bars above pair each city's summer and winter, not the calendar month.
Compare Atlanta and Porto Alegre month by month on the interactive map →
See Porto Alegre's climate twin on its own page.
On Similar Climates, Porto Alegre, Brazil is the closest distant match for Atlanta, Georgia — scored fair, about 7,901 km (4,909 mi) away.
Atlanta and Porto Alegre are separated by roughly 7,901 km (4,909 mi) on the great-circle route.
No — they sit in opposite hemispheres, so seasons run about six months apart: Porto Alegre’s July pairs with Atlanta’s January in the comparison.
Yes — both are humid subtropical (Cfa).
Atlanta has a humid subtropical climate (Cfa). January averages a high of 12°C and a low of 2°C with 104 mm of rain; July averages 32°C / 22°C and 135 mm.
Atlanta averages about 6.7 hours of sunshine a day in January and 11.2 hours in July.
January PM2.5 averages about 8.9 µg/m³ (US AQI 45); July averages 17.6 µg/m³ (US AQI 78).
Other close climate matches for Atlanta: Buenos Aires (loose), Shanghai (loose), Islamabad (loose).
All humid subtropical (Cfa) cities on Similar Climates →
Explore Atlanta and Porto Alegre on the interactive map →