Oslo vs San Juan: which is better, month by month

Oslo and San Juan split the year 6–6 — Oslo wins April to September, San Juan wins October to March.

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.

Oslo

🇳🇴 Norway · mild climate

Best month
July 94/100
Months won
6 of 12

San Juan

🇵🇷 Puerto Rico · tropical climate

Best month
January 77/100
Months won
6 of 12

Oslo vs San Juan — all 12 months

MonthOsloSan JuanWinnerGap
January33Ffreezing, a little rain, clean air77Bhot, a little rain, clean airSan Juan44
February43Ffreezing, a little rain, clean air75Bhot, a little rain, clean airSan Juan32
March61Ccold, a little rain, clean air77Bhot, a little rain, clean airSan Juan16
April76Bcold, a little rain, clean air72Bhot, rainy, clean airOslo4
May83Anice, a little rain, clean air70Bsweltering, rainy, clean airOslo13
June90Snice, rainy, clean air70Bsweltering, a little rain, clean airOslo20
July94Swarm, rainy, clean air66Csweltering, rainy, clean airOslo28
August86Anice, rainy, clean air64Csweltering, rainy, clean airOslo22
September74Bnice, rainy, clean air61Csweltering, rainy, clean airOslo13
October59Dcold, rainy, clean air63Csweltering, rainy, clean airSan Juan4
November47Fcold, a little rain, clean air64Csweltering, soaked, clean airSan Juan17
December36Ffreezing, a little rain, clean air73Bhot, a little rain, clean airSan Juan37

A month is a tie when the two are within 3 points. The widest gap is January (33 vs 77). Tap a month for that month's temperature, rain, humidity and air quality side by side.