The weather in San Juan in May is very hot. The average temperatures are between 75°F and 82°F, drinking water regularly is advisable.
You can expect rain for roughly half of the month of May in San Juan. We’re expecting roughly 8 to 15 days of rain, so your rubber boots and umbrella are going to see plenty of use this month if you’re keen on staying dry.
Our weather forecast can give you a great sense of what weather to expect in San Juan in May 2025.
If you’re planning to visit San Juan in the near future, we highly recommend that you review the 14 day weather forecast for San Juan before you arrive.
Temperatures
82° / 75°
Rainy Days
8
Snowy Days
0
Dry Days
23
Rainfall
5.98
in
Sun Hours
11.2
Hrs
