San Juan Weather and Climate: A Comprehensive Guide
San Juan maintains a fairly consistent warm average temperature.
It also has a relatively rainy climate with high levels of precipitation.
Let’s explore the climate details in depth to provide you with a complete overview.
Average maximum day and minimum night temperature
The climate in San Juan remains fairly constant, offering comfortable temperatures throughout the year. On average, daytime temperatures range from a very warm 30°C in September to a comfortable 28°C in January.
Nighttime temperatures can drop, with average lows reaching 24°C in January. Check out our detailed temperature page for more information.Temperature ranges by month
Precipitation and rainy days
San Juan is known for its substantial rainfall, with annual precipitation reaching 1164 mm. The seasons in San Juan, bring significant changes in precipitation. The wettest month, August, receives high rainfall, with an average of 156 mm of precipitation. This rainfall is distributed across 22 rainy days. In contrast, the driest month, March, experiences much less rainfall, totaling 32 mm over 9 rainy days. These distinct seasonal differences provide diverse experiences throughout the year. For more details, please visit our San Juan Precipitation page.The mean monthly precipitation over the year, including rain, hail and snow
The average number of days each month with precipitation
Sunshine over the year
San Juan enjoys sunny spells year-round. March sees up to 8.2 hours of daily sunshine, perfect for a sunny trip. June, the least sunny month, still offers a generous 6.2 hours of sun despite this cloudier time of the year. Visit our detailed sunshine hours page for more information.Monthly hours of sunshine
Daily hours of sunshine
Average water temperature
The mean water temperature over the year ranges from 26°C in February to 28°C in May.
Water temperature over the year
Average humidity
The city experiences its highest humidity in November, reaching 86%. In March, the humidity drops to its lowest level at 77%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
partly cloudy and no rain partly cloudy and chance of rain broken clouds and rainForecast for San Juan
4 m/s
3 m/s
3 m/s
Select a Month of Interest
Check the conditions for any month of the year.
The best time of year to visit San Juan in Trinidad & Tobago
The best time to visit is during the drier months: February, March and April.Other facts from our historical weather data:
September has an average maximum temperature of 30°C and is the hottest month of the year.
The coolest month is February with an average maximum temperature of 28°C.
August tops the wettest month list with 156 mm of rainfall.
March is the driest month with 32 mm of precipitation.
March is the sunniest month with an average of 247 hours of sunshine.
No idea where to travel to this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.
