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White sand and turquoise water on a sunny day in Cancún's Hotel ZoneAerial view of Castillo San Felipe del Morro on the tip of Old San Juan, Puerto Rico

Cancún vs San Juan in July

San Juan edges it in July. Cancún averages 25–34°C with moderate–high crowds; San Juan 25–32°C with moderate crowds.

By Daan · Last reviewed October 2026

Cancún and San Juan

The verdict for July

  • WeatherVery similar6.5/10 vs 6.5/10
  • CrowdsSan Juan is quieterModerate–High vs Moderate
  • PricesSan Juan is cheaper$$$ vs $$$
  • OverallSan Juan comes out ahead5.5/10 vs 6/10
White sand and turquoise water on a sunny day in Cancún's Hotel Zone

Cancún in July

Summer holiday busy

Temperature
25–34°C
Crowds
Moderate–High
Prices
$$$

+Warm sea and long days.

–Hot, humid and storm risk.

July is hot and humid, with summer holiday crowds from the US and Mexico.

Aerial view of Castillo San Felipe del Morro on the tip of Old San Juan, Puerto Rico

San Juan in July

Hot summer holidays

Temperature
25–32°C
Crowds
Moderate
Prices
$$$

+Long sunny spells between showers.

–Hot and humid.

July is hot and humid, with summer holiday visitors.

Scores and crowd levels are my own judgement; temperatures are monthly averages. Higher scores are better: quieter, cheaper and more pleasant.