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

San Juan beats Reykjavík in 7 of 12 months — its lead peaks in January (77 vs 31) — while Reykjavík wins June to September; they are within 3 points in May.

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.

Reykjavík

🇮🇸 Iceland · mild climate

Best month
July 85/100
Months won
4 of 12

San Juan

🇵🇷 Puerto Rico · tropical climate

Best month
January 77/100
Months won
7 of 12

Reykjavík vs San Juan — all 12 months

MonthReykjavíkSan JuanWinnerGap
January31Ffreezing, rainy, clean air77Bhot, a little rain, clean airSan Juan46
February40Ffreezing, rainy, clean air75Bhot, a little rain, clean airSan Juan35
March50Dcold, rainy, clean air77Bhot, a little rain, clean airSan Juan27
April64Ccold, rainy, clean air72Bhot, rainy, clean airSan Juan8
May72Bcold, rainy, clean air70Bsweltering, rainy, clean airTie2
June78Bcool, rainy, clean air70Bsweltering, a little rain, clean airReykjavík8
July85Acool, a little rain, clean air66Csweltering, rainy, clean airReykjavík19
August81Acool, rainy, clean air64Csweltering, rainy, clean airReykjavík17
September68Ccold, rainy, clean air61Csweltering, rainy, clean airReykjavík7
October56Dcold, rainy, clean air63Csweltering, rainy, clean airSan Juan7
November43Fcold, rainy, clean air64Csweltering, soaked, clean airSan Juan21
December33Ffreezing, rainy, clean air73Bhot, a little rain, clean airSan Juan40

A month is a tie when the two are within 3 points. The widest gap is January (31 vs 77). Tap a month for that month's temperature, rain, humidity and air quality side by side.