Weather in San Juan in October 2025
Average weather
Average temperature in San Juan in October
Going from a maximum of +93°F during the day to a minimum of +75°F during the night, the temperature in October averages around +90°F.
The average maximum temperature goes up 10% by the end of the month, compared with the beginning of the month, from +88°F to +90°F.
Is San Juan warm or cold in October?
San Juan is typically warm in October.
Maximum temperatures go down compared to the previous month from +88°F to +86°F. The minimum temperature also goes down from +79°F to +77°F.
It’s generally warm, but pack a long-sleeve shirt for evenings.
Take a look at how October is compared to other months in San Juan:
Water temperature in San Juan in October
Water in San Juan in October is Very warm. It varies from +83°F to +86°F, with an average of +84°F. This is almost similar to the air temperature, which averages +86°F.
The water temperature in October is one of the warmest of the entire year:
Can you swim in San Juan in October?
Climate in San Juan in October
| September | October | November | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +88°F | +86°F | +84°F | ||||
| Min. temperature | ||||||
| +73°F | +73°F | +70°F | ||||
| Max. temperature | ||||||
| +95°F | +97°F | +93°F | ||||
| Rainfall | ||||||
| 148 mm | 151 mm | 106 mm | ||||
| Wind | ||||||
| 2 m/s | 2 m/s | 2 m/s | ||||
| Avg. water temperature | ||||||
| +85°F | +84°F | +83°F | ||||
| Humidity | ||||||
| 78% | 78% | 79% | ||||
| Air pressure | ||||||
| 1013 HPa | 1012 HPa | 1013 HPa | ||||
| Sunny days | ||||||
| 1 | 1 | 1 | ||||
| Cloudy days | ||||||
| 2 | 3 | 4 | ||||
| Rainy days | ||||||
| 20 | 21 | 23 | ||||
| Snowy days | ||||||
| 0 | 0 | 0 | ||||
October weather is still as ok as in September. It’s getting colder in October. From +88°F in the day, the average maximum temperature lowers to +86°F. Prepare for more rain. Average rainfall goes from 148 mm to 151 mm. Humidity levels don’t change as the month goes on, averaging around 78%. The average wind speed doesn’t change much during October, staying around 2 m/s. The amount of sunny days stay about the same, averaging 1 sunny days during the month.
November brings much the same weather, it remains ok.
Wind
The average wind speed is 3 m/s getting up to 4 m/s which is a light breeze; barely moving the tree leaves.
The average wind speed in San Juan is gradually increasing during October, going from 3 m/s to 3 m/s over the course of the month.
Rain
How was the weather last October in San Juan?
Climate Change Over the Years
The climate in San Juan in October has not changed that much over the last 43 years.
The average temperature was the lowest in 2008 (+84°F) and the highest in 2013 (+87°F). The driest year was 1994 with only 675 mm of rainfall, and the wettest year was 2023 with 2338 mm.
FAQ
Is October a good time to visit San Juan?
Can you sunbathe in San Juan in October?
Can you swim in San Juan in October?
Is San Juan rainy in October?
Is it sunny in San Juan in October?
Monthly weather in San Juan
Source of the data
For this page, we’ve looked at the typical weather in San Juan, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.