San Juan Temperatures: Monthly Averages and Year-Round Insights
On this page, we’ll explore San Juan’s temperature statistics in detail, including day and night variations and monthly averages. We’ll also compare the annual temperature to other cities in Trinidad & Tobago.
Monthly Temperature Averages
In San Juan temperatures are generally consistent throughout the year. Average maximum daytime temperatures range from a very warm 30°C in September, the warmest time of the year, to a comfortable 28°C during cooler months like January. At night, minimum temperatures typically average around 24°C during these months.
The chart below illustrates the average maximum day and minimum night temperatures in San Juan by month:
The minimum temperature is commonly observed between 4 AM and 6 AM, with the maximum occurring around 3 PM, when the sun’s strength is at its peak. September, the city’s warmest month, sees 197 hours of sunshine.
The chart below shows the average temperature throughout the year:
January, the city’s coldest month, receives about 59 mm of rainfall spread over roughly 14 days. For more information, please visit our San Juan Precipitation page.
Annual Temperatures in Trinidad & Tobago Compared
The map below shows the annual temperature across Trinidad & Tobago. You can also select the different months in case you are interested in a specific month.
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warm
pleasant
moderate
cold
very cold
San Juan Temperatures Compared World Wide
San Juan’s average annual maximum temperature is 29°C. Let’s compare this with some popular tourist destinations:
In Barcelona, Spain, the average annual temperature is around 21°C, resulting in warm summers and mild winters throughout the year.
Interlaken, Switzerland, the average annual temperature is significantly lower at 8°C, with mild summers and very cold winters.
Osaka, Japan, offers a similar climate to Tokyo, with an average annual temperature of 22°C.
Perth, Australia, experiences a Mediterranean climate, with a pleasant average temperature of 25°C.
How does the temperature feel?
Humidity is an essential factor in how you experience temperature. When a warm period is accompanied by high humidity, it results in a higher perceived temperature. This is especially true when temperatures exceed 25°C, as it can cause greater discomfort.
In San Juan, during the coolest month, January, you will experience 81% humidity, which is considered very high. This is accompanied by an average maximum temperature of 28°C. In the warmest month, September, the humidity is 84% combined with an average maximum temperature of 30°C, which creates a very high-feel temperature. Explore our detailed page on humidity levels for further details.
How are these Temperatures Measured?
Generally, temperature data depicting climate is usually given over a 30-year average in order to reduce short-term fluctuations and reveal better long-term trends in climate conditions.
This temperature data is taken from land-based thermometers, ocean buoys, ships, and satellites. These measurements are transmitted to weather stations and climate centers around the globe where they are processed, averaged, and analyzed in order to monitor the trends and create climate models.
Temperatures in the Mountains
Although not all regions have mountains, elevated areas exhibit distinct temperature variations.
- Sun Exposure: Sunlit slopes tend to be warmer, while shaded areas remain cooler.
- Altitude Effects: Temperatures drop by approximately 6°C for every 1,000 meters of elevation, creating distinct microclimates.
For more detailed information about San Juan’s weather, including monthly rainfall, sunshine hours, and humidity levels, visit our San Juan climate page.
Current temperature in San Juan
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