San Juan Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit San Juan.
Climate overview of San Juan
With consistently stable weather, San Juan, Trinidad, Trinidad & Tobago, sees little seasonal temperature change. Daytime highs average 29°C (84°F), ranging from 30°C (86°F) in September to 28°C (82°F) in January.
The city has a wet climate, receiving around 1164 mm (46 in) of rainfall per year. Despite the high annual total, it has a distinct dry season from February to April. August is the wettest month. Sunshine peaks in March, when the city sees around 8.2 hours of sunshine per day.
San Juan Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in San Juan - and find the best time to visit.
Monthly Temperature in San Juan
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 (86°F) in September to a comfortable 28°C (82°F) in January.
Nighttime temperatures range from 26°C (79°F) in September to 24°C (75°F) in January.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in San Juan
San Juan is known for its substantial rainfall, with annual precipitation reaching 1164 mm (46 in). The seasons in San Juan bring significant changes in precipitation. The wettest month, August, receives high rainfall, with an average of 156 mm (6.1 in) of precipitation. This rainfall is distributed across 22 rainy days.
In contrast, the driest month, March, experiences much less rainfall, totaling 32 mm (1.3 in) 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 Hours in San Juan
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
Water Temperature in San Juan
The mean water temperature over the year ranges from 26°C (79°F) in February to 28°C (82°F) in May.
Water temperature over the year
Humidity in San Juan by Month
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
Best Time to Visit San Juan
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: January, February and March
- Warmest weather: March, April, May, June, July, August, September, October, November and December
- Most sunshine: January, March and April
- Fewest rainy days: April
- Best for swimming: Any time of year. The sea stays pleasantly warm year-round.
- Seasonal pattern: A distinct dry season from February to April
Frequently asked questions about the climate in San Juan
What is the best time to visit San Juan?
January, February and March typically offer the most optimal weather in San Juan. In contrast, August, September and October tend to have less optimal conditions. San Juan has a distinct dry season from February to April.
What temperatures can I expect in San Juan?
Daytime highs range from 28°C (82°F) in January to 30°C (86°F) in September. Nighttime lows range from 24°C (75°F) to 26°C (79°F). Temperatures stay relatively stable year-round.
How much rain does San Juan get?
Annual rainfall is around 1164 mm (46 in). August is the wettest month with 156 mm (6.1 in), while March is the driest with 32 mm (1.3 in).
How sunny is San Juan?
San Juan receives around 2,610 hours of sunshine per year. March is the sunniest month with 247 hours, while June is the cloudiest with just 186 hours. Overall, San Juan enjoys abundant sunshine.
San Juan 3-Day Forecast
San Juan on the map
San Juan is highlighted - select any city to see its climate.
Popular this month
Where to go in September - average daytime high across popular destinations.
San Juan
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