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One page of sourced numbers per city: what a day costs, what the travel advisory says, and which months score best on the weather.

Data: GeoNames, Open-Meteo, World Bank, US State Department, UK FCDO.

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© 2026 Travel City Index. Every number on this site comes from a dataset named on the page that shows it.
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Argentina · Brazil

Buenos Aires vs Rio de Janeiro: cost, safety and weather compared (2026)

Every figure below comes from the same datasets for both cities, so the two columns are comparable.

Buenos Aires and Rio de Janeiro compared on cost, safety, weather and size
Buenos AiresArgentinaRio de JaneiroBrazil
Daily cost, per personestimate
Budget$45$50
Mid-range$110$120
Luxury$235$255
Price level0.46× US (2025)0.46× US (2025)
US advisoryLevel 1Level 2
Best monthsJan, Feb, Oct and NovApr, May, Jun and Sep
Annual rain1,084 mm901 mm
Average high21.9 °C27.7 °C
Population2.9M6.7M
Time zoneAmerica/Argentina/Buenos_AiresAmerica/Sao_Paulo

The short answer

Buenos Aires is about 8 % cheaper per day than Rio de Janeiro, $110 against $120 (mid-range estimate). Buenos Aires has the lower US advisory level (1 vs 2). In September, the daily average is 15 °C in Buenos Aires and 24 °C in Rio de Janeiro.

Keep reading

City overviews

  • Buenos Aires overview
  • Rio de Janeiro overview

Cost and safety in detail

  • Buenos Aires trip cost
  • Is Buenos Aires safe?
  • Rio de Janeiro trip cost
  • Is Rio de Janeiro safe?

Where they rank

  • Cheapest cities in South America
  • Safest cities in South America

Countries

  • All cities in Argentina
  • All cities in Brazil

Sources

  • GeoNames city database — CC BY 4.0, fetched September 14, 2026
  • Open-Meteo climate archive — CC BY 4.0, fetched September 21, 2026
  • World Bank price level and exchange rate — CC BY 4.0, data year 2025
  • US State Department travel advisories — public domain, fetched September 21, 2026

Dates are the most recent fetch across the cities on this page. Every sentence here is generated from the data by rule, with no AI writing; the formulas are public.