Weather in San Juan in July 2025
Average weather
Average temperature in San Juan in July
The temperature in July is +31°C on average, with a range between a maximum of +34°C during the day and a minimum of +24°C at night.
The average maximum temperature goes down 20% by the end of the month, compared with the beginning of the month, from +33°C to +31°C.
Is San Juan warm or cold in July?
San Juan is typically hot in July.
Maximum temperatures go up compared to the previous month from +31°C to +31°C. The minimum temperature also goes up from +25°C to +26°C.
Make sure that you pack your summer linen and swimming costumes; it’s probably going to be hot.
July is one of the warmest months in San Juan, here is the comparison with other months:
Water temperature in San Juan in July
Water in San Juan in July is Very warm. It varies from +27°C to +30°C, with an average of +29°C. This is almost similar to the air temperature, which averages +31°C.
In July, water temperatures are average relative to the rest of the year:
Can you swim in San Juan in July?
Climate in San Juan in July
| June | July | August | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +31°C | +31°C | +31°C | ||||
| Min. temperature | ||||||
| +22°C | +23°C | +23°C | ||||
| Max. temperature | ||||||
| +35°C | +35°C | +35°C | ||||
| Rainfall | ||||||
| 79 mm | 84 mm | 106 mm | ||||
| Wind | ||||||
| 3 m/s | 3 m/s | 3 m/s | ||||
| Avg. water temperature | ||||||
| +28°C | +29°C | +29°C | ||||
| Humidity | ||||||
| 77% | 78% | 78% | ||||
| Air pressure | ||||||
| 1016 HPa | 1016 HPa | 1015 HPa | ||||
| Sunny days | ||||||
| 2 | 1 | 1 | ||||
| Cloudy days | ||||||
| 5 | 5 | 3 | ||||
| Rainy days | ||||||
| 20 | 21 | 22 | ||||
| Snowy days | ||||||
| 0 | 0 | 0 | ||||
July weather is still as ok as in June. The temperature levels stay the same in the area of +31°C for average maximum temperature during the day. Prepare for more rain. Average rainfall goes from 79 mm to 84 mm. Humidity rises from 77% to 78%. The average wind speed doesn’t change much during July, staying around 3 m/s. The days becoming less sunny, going from 2 sunny days in June to 1 in July.
August brings much the same weather, it remains ok.
Wind
The average wind speed is 5 m/s getting up to 6 m/s which is a medium breeze. You can feel it, especially getting out of the water.
The average wind speed in San Juan is gradually increasing during July, going from 4 m/s to 5 m/s over the course of the month.
Rain
How was the weather last July in San Juan?
Climate Change over Years
The climate in San Juan in July has not changed much over the last 43 years.
The average temperature was the lowest in 2008 (+29°C) and the highest in 2013 (+31°C). The driest year was 1994 with only 675 mm of rainfall, and the wettest year was 2023 with 2338 mm.
FAQ
Is July a good time to visit San Juan?
Can you sunbathe in San Juan in July?
Can you swim in San Juan in July?
Is San Juan rainy in July?
Is it sunny in San Juan in July?
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.