Colonia del Sacramento vs Rosario: which is better, month by month

Colonia del Sacramento and Rosario split the year 3–3 — Colonia del Sacramento wins November to January, Rosario wins July to September, and they are within 3 points in the other 6 months.

Each place is scored under the lens that suits its type. Comfort is SeasonMap's 0–100 estimate from ERA5 climate normals, not a forecast.

Colonia del Sacramento

🇺🇾 Uruguay · mild climate

Best month: November 91/100
Months won: 3 of 12

Rosario

🇦🇷 Argentina · mild climate

Best month: September 91/100
Months won: 3 of 12

Colonia del Sacramento vs Rosario — all 12 months

Month	Colonia del Sacramento	Rosario	Winner	Gap
January	80Ahot, rainy, clean air	75Bsweltering, rainy, clean air	Colonia del Sacramento	5
February	80Ahot, rainy, clean air	77Bsweltering, rainy, clean air	Tie	3
March	83Awarm, rainy, clean air	81Ahot, rainy, clean air	Tie	2
April	85Anice, rainy, clean air	84Awarm, rainy, clean air	Tie	1
May	82Anice, a little rain, clean air	83Anice, a little rain, clean air	Tie	1
June	78Bcool, a little rain, clean air	81Anice, dry, clean air	Tie	3
July	75Bcool, a little rain, clean air	79Bnice, a little rain, clean air	Rosario	4
August	80Acool, a little rain, clean air	85Anice, a little rain, clean air	Rosario	5
September	85Anice, a little rain, clean air	91Snice, a little rain, clean air	Rosario	6
October	89Anice, a little rain, clean air	91Swarm, a little rain, clean air	Tie	2
November	91Swarm, a little rain, clean air	86Ahot, rainy, clean air	Colonia del Sacramento	5
December	85Ahot, rainy, clean air	81Ahot, a little rain, clean air	Colonia del Sacramento	4

A month is a tie when the two are within 3 points. The widest gap is September (85 vs 91). Tap a month for that month's temperature, rain, humidity and air quality side by side.