Weather in Cayo Guillermo: January
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Average day temperature: | 76.6°F |
| Average night temperature: | 72.1°F | |
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Sea water temperature: | 77.8°F |
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Number of sunny days: | 10 days |
| Day length: | 10.8 - 11.1 hours | |
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Number of rainy days: | 2 days |
| Precipitation totals: | 1.2 in. | |
| more information | ||
forecast
| Cayo Guillermo |
temperature
| Cayo Guillermo |
Air temperature in January, °F
The highest day temperature during January of 2026 was 78°F. At the same time the lowest night temperature was 68°F. Daily and nightly averages during January were 75.5°F and 73.6°F.
Sea water temperature in Cayo Guillermo in January, °F
The average sea water temperature in January of 2026 was 77.8°F. The highest and lowest sea temperatures during the month were 80.2°F and 75.4°F.
Mostly all days in January are partly cloudy but sunny or cloudy days are also possible.
Precipitation total in January, in.
Precipitation total value in Cayo Guillermo in January is 1.4 in. Other months of the year show relatively similar values.
The average wind speed value in January is 14.0 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 January is: 6.3.
Best time for vacation in Cayo Guillermo
Cayo Guillermo on a weather map
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