Climate
Buenos Aires logs 0 frost days a year to San Juan's 18 — Buenos Aires wins by 18. Buenos Aires also leads on hot days by 115.
Buenos Aires
Feels-like °C
Dinner outside
San Juan
Feels-like °C
Dinner outside
Cost of Living
Buenos Aires averages $1,148/mo for balanced living; San Juan has no cost baseline yet.
Buenos Aires
$1,148monthly · balanced
Mobility
Buenos Aires scores 3.0 on mobility (0–5 scale); San Juan has no mobility baseline.
Culture
Buenos Aires's culture score of 4.1 sits well above San Juan's 0.0.
Nature & Outdoors
Buenos Aires scores 3.2 on nature & outdoors (0–5 scale); San Juan has no nature & outdoors baseline.
Safety
Buenos Aires scores 1.5 on safety (0–5 scale); San Juan has no safety baseline.
Career
Buenos Aires scores 3.4 on career (0–5 scale); San Juan has no career baseline.
Social & Community
Buenos Aires scores 3.2 on social & community (0–5 scale); San Juan has no social & community baseline.
Food & Dining
Buenos Aires scores 3.4 on food & dining (0–5 scale); San Juan has no food & dining baseline.
Family
Buenos Aires scores 3.1 on family (0–5 scale); San Juan has no family baseline.
Healthcare
Buenos Aires scores 2.7 on healthcare (0–5 scale); San Juan has no healthcare baseline.
Air Quality
Buenos Aires averages 15.4 µg/m³ (sensitive-groups) PM2.5 annually versus San Juan's 19.1 µg/m³ (sensitive-groups) — Buenos Aires breathes ~19% cleaner air (3.7 µg/m³ lower).
Buenos Aires
San Juan
PM2.5 annual average
WHO classification
City Scale
Both maps at the same real-world scale — 1 cm on either map is the same distance.
Buenos Aires (14.2M) and San Juan (465K) are 31x in population — Buenos Aires is the larger metro, San Juan the smaller; on land area Buenos Aires spans roughly 20x more ground.
Buenos Aires is roughly 25x the scale of San Juan
Combined population & area comparison
Buenos AiresSan JuanCity Scale Rankings
Buenos Aires14.2M31xSan Juan465K1xBuenos Aires2,186 km²20xSan Juan109 km²1xBuenos Aires
San Juan
Who Thrives Here
Buenos Aires is the stronger fit for the big city energy. Both cities work well for the sunshine lover.
Also compared
Barcelona 
Berlin 
MiamiFrequently asked about Buenos Aires vs San Juan
▶Which is cheaper, Buenos Aires or San Juan?
▶How does the climate compare between Buenos Aires and San Juan?
▶Is Buenos Aires or San Juan safer?
▶Should I move to Buenos Aires or San Juan?
The best city depends on what matters to you
This comparison shows how Buenos Aires and San Juan stack up on the data. But your climate preferences, budget, career needs, and lifestyle priorities can shift the picture entirely. A personalized diagnostic finds what fits your life.
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