July weather forecast
Cayo Guillermo, Cuba

As one of the peak summer months, July in Cayo Guillermo is characterized by intense humidity and scorching temperatures which reach up to 33°C (91.4°F), the highest of the year. Adding to this, a significant UV index of 12 leaves no room for complacency when it comes to sun protection. July carries forward the extended daylight hours, further intensifying the summer vibe. Despite the heat, rainfall reaches a comparatively moderate 90mm (3.54"), a relief from the previous heavy downpours. The transition from July to August does not imply dramatic weather changes.

Temperature

During July and August, Cayo Guillermo experiences its warmest period, with an average high-temperature of 33°C (91.4°F).

Rainfall

In Cayo Guillermo, in July, it is raining for 13 days, with typically 90mm (3.54") of accumulated precipitation. In Cayo Guillermo, during the entire year, the rain falls for 125 days and collects up to 1200mm (47.24") of precipitation.

Sea temperature

June through October, with an average sea temperature of 29°C (84.2°F), are months with the warmest seawater in Cayo Guillermo.
Note: Temperatures between 25°C (77°F) and 29°C (84.2°F) are excellent for swimming, diving, and other water activities, providing comfort and enjoyment for extended periods without discomfort.

Daylight

In July, the average length of the day is 13h and 22min.
On the first day of the month, sunrise is at 06:33 and sunset at 20:03. On the last day of July, in Cayo Guillermo, sunrise is at 06:46 and sunset at 19:56 CDT.

Sunshine

In July, the average sunshine is 8h.

UV index

The months with the highest UV index are April through August, with an average maximum UV index of 12. A UV Index estimate of 11, and higher, represents an ultimate health vulnerability from exposure to the Sun's UV radiation for the ordinary person.
Note: The UV index of 12 in July translates into these instructions:
Implement every essential safety step. Individuals with fair skin might receive burns in less than 5 minutes. Try to minimize direct Sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation. Also note that objects like parasols or canopies might not provide complete sun protection. Employ a hat with a wide brim for robust protection, cutting UV exposure by half. Even on cloudy days, a sunscreen with a minimum 30 sun protection factor should be generously applied and frequently re-applied, including after every swim or outdoor exercise. Take heed! Reflections of sand and water make the Sun's UV rays stronger.