July weather forecast
Cayenne, French Guiana

July utters the first whispers of the dry season in Cayenne, French Guiana. The weather context subtly changes with slightly cooler nights and lengthening daylight hours. Even though episodes of rain persist, their frequency decreases compared to previous months. Sunshine hours visibly escalate, slowly shifting the city's climate. A further marked decrease in rainfall to 246mm (9.69") in July corroborates this ongoing transition.

Temperature

At the start of July, Cayenne's average high-temperature reaches a still tropical 30.8°C (87.4°F), subtly different from the preceding month. The nights of July in Cayenne, French Guiana, anticipate an average low-temperature of 22.4°C (72.3°F).

Rainfall

In Cayenne, French Guiana, in July, it is raining for 20.6 days, with typically 246mm (9.69") of accumulated precipitation. Throughout the year, in Cayenne, there are 221.1 rainfall days, and 3516mm (138.43") of precipitation is accumulated.

Sea temperature

In July, the average sea temperature in Cayenne, French Guiana, is 28.6°C (83.5°F).
Note: Surface water temperatures between 25°C (77°F) and 29°C (84.2°F) are perceived as excellent and extremely agreeable for enduring enjoyment in water activities.

Daylight

In July, the average length of the day in Cayenne is 12h and 23min.
On the first day of the month, sunrise is at 06:21 and sunset at 18:45. On the last day of July, sunrise is at 06:25 and sunset at 18:45 -03.

Sunshine

The average sunshine in July is 6.3h.

UV index

The months with the lowest UV index are July and December, with an average maximum UV index of 11. A UV Index value of 11, and more, symbolizes an ultimate health vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: A daily maximum UV index of 11 in July translates into the following instructions:
Implement all key precautions. Warding off sun damage is critical. Minimize exposure to direct sunlight and seek shade from 10 a.m. to 4 p.m., when UV radiation is most intense, but remember that shade structures may not offer complete protection. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. After a swim or an outdoor workout, generously apply and regularly reapply a sunscreen with at least SPF 30, even if the day is cloudy. Watch out! Sand and water enhance the UV exposure you receive.