August weather forecast
Cayenne, French Guiana

In August, Cayenne, French Guiana, steps further into the realm of the dry season. The usually rainfall-rich climate observes exceptional changes. Clear skies, reduced thunderstorms, and increased sunshine hours bring more cheerful outdoors experiences. However, the sea temperature stays consistent, keeping water activities enjoyable. A continued diminution of rainfall to a mere 144mm (5.67") in August affirmatively declares the dominance of the dry season.

Temperature

August in Cayenne begins with an average high-temperature of a still hot 31.6°C (88.9°F), reflecting close similarity to the preceding month. In the month of August, the nighttime temperature dips to a steady average of 22.4°C (72.3°F).

Rainfall

In August, the rain falls for 14.2 days. Throughout August, 144mm (5.67") of precipitation is accumulated. Throughout the year, there are 221.1 rainfall days, and 3516mm (138.43") of precipitation is accumulated.

Sea temperature

August is the month with the warmest seawater, with an average sea temperature of 28.7°C (83.7°F).
Note: For swimming, diving, or other water activities, temperatures from 25°C (77°F) to 29°C (84.2°F) provide the most enjoyable experience for extended periods without discomfort.

Daylight

In Cayenne, the average length of the day in August is 12h and 16min.
On the first day of the month, sunrise is at 06:25 and sunset at 18:45. On the last day of August, in Cayenne, French Guiana, sunrise is at 06:23 and sunset at 18:35 -03.

Sunshine

In August, the average sunshine in Cayenne is 7.4h.

UV index

January through June, August through November, with an average maximum UV index of 12, are months with the highest UV index in Cayenne. A UV Index of 11, and more, symbolizes an ultimate health vulnerability from exposure to the Sun's UV rays for the ordinary person.
Note: The maximum UV index of 12 during August translates into these guidelines:
Carry out all important precautions, unprotected skin could get burns in no time. Seek shade and limit direct Sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its peak, but be aware that not all shade structures provide complete sun protection. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades. Frequent application of a broad-spectrum SPF 30+ sunscreen is crucial, reapply it every two hours or immediately post swimming or outdoor exercise. Stay vigilant! UV rays get a boost in intensity due to sand and water reflections.