Weather in San Juan: July
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Average day temperature: | 86.5°F |
| Average night temperature: | 78.8°F | |
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Sea water temperature: | 83.1°F |
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Number of sunny days: | 6 days |
| Day length: | 13.0 - 13.2 hours | |
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Number of rainy days: | 3 days |
| Precipitation totals: | 2.3 in. | |
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forecast
| San Juan |
temperature
| San Juan |
Air temperature in July, °F
The highest day temperature during July of 2025 was 87°F. At the same time the lowest night temperature was 77°F. Daily and nightly averages during July were 84.8°F and 80.0°F.
Sea water temperature in San Juan in July, °F
The average sea water temperature in July of 2025 was 83.5°F. The highest and lowest sea temperatures during the month were 84.6°F and 82.6°F.
Mostly all days in July are partly cloudy but sunny or cloudy days are also possible.
Precipitation total in July, in.
Precipitation total value in San Juan in July is 2.5 in. Other months of the year show relatively similar values.
The average wind speed value in July is 12.4 mph It makes July most windy month of the year.
This chart shows average number of hours during the day when sunlight can reach the ground. It depends on day length and cloudiness during the day. The average number of sunny hours in July is: 5.9.
Best time for vacation in San Juan
San Juan on a weather map
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