Weather in Cayo Guillermo: July
 |
Average day temperature: | 86.5°F |
| Average night temperature: | 80.7°F | |
 |
Sea water temperature: | 85.2°F |
 |
Number of sunny days: | 11 days |
| Day length: | 13.2 - 13.5 hours | |
 |
Number of rainy days: | 4 days |
| Precipitation totals: | 2.4 in. | |
| more information | ||
forecast
| Cayo Guillermo |
temperature
| Cayo Guillermo |
Air temperature in July, °F
The highest day temperature during July of 2025 was 85°F. At the same time the lowest night temperature was 80°F. Daily and nightly averages during July were 83.6°F and 81.9°F.
Sea water temperature in Cayo Guillermo in July, °F
The average sea water temperature in July of 2025 was 85.3°F. The highest and lowest sea temperatures during the month were 86.2°F and 83.8°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 Cayo Guillermo in July is 2.7 in. Other months of the year show relatively similar values.
The average wind speed value in July is 13.9 mph
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: 7.0.
Best time for vacation in Cayo Guillermo
Cayo Guillermo on a weather map
16 mph
16 mph
15 mph
16 mph
14 mph
13 mph
14 mph
12 mph
