Cayenne
French Guiana
Long-term weather forecast
Long-term weather forecast

October weather forecast and climate
Cayenne, French Guiana

Palm trees in a botanical garden in Cayenne, French Guiana, overlooking green fields under clear skies
Palm trees in a botanical garden in Cayenne, French Guiana, overlooking green fields under clear skies
October, like September, is another hot autumn month in Cayenne, French Guiana, with average temperature varying between 22.3°C (72.1°F) and 32.2°C (90°F).

Temperature

With an average high-temperature of 32.2°C (90°F) and an average low-temperature of 22.3°C (72.1°F), October is the warmest month.

Rainfall

In Cayenne, in October, it is raining for 7.6 days, with typically 63.3mm (2.5") of accumulated precipitation. In Cayenne, French Guiana, during the entire year, the rain falls for 221.1 days and collects up to 3516.3mm (138.4") of precipitation.

Sea temperature

In Cayenne, the average water temperature is 28.5°C (83.3°F). For swimming, diving, and other water activities, temperatures between 25°C (77°F) and 29°C (84.2°F) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable.

Daylight

In Cayenne, French Guiana, the average length of the day is 12h.

Sunshine

In October, the average sunshine is 8.1h.

UV index

January through June, August through November, with an average maximum UV index of 12, are months with the highest UV index. A UV Index estimate of 11, and higher, represents an extreme health hazard from unsafe exposure to the UV radiation for the average person.
In October, the average maximum UV index of 12 translate into the following recommendations:
Take all required precautions, as unprotected skin and eyes can burn in minutes. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. 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. Beware! The reflection of water and sand dramatically increases exposure to the UV rays.

What is the warmest month in Cayenne?

October is the warmest month in Cayenne, French Guiana, with an average high-temperature of 32.2°C (90°F) and an average low-temperature of 22.3°C (72.1°F).

What is the temperature in October in Cayenne?

In October, in Cayenne, French Guiana, the average high-temperature is 32.2°C (90°F), and the average low-temperature is 22.3°C (72.1°F).

How much does it rain in Cayenne in October?

In Cayenne, during October, the rain falls for 7.6 days and regularly aggregates up to 63.3mm (2.5") of precipitation.

What is the sea water temperature in October in Cayenne?

In Cayenne, French Guiana, the average seawater temperature in October is 28.5°C (83.3°F). For any water activity, surface water temperatures between 25°C (77°F) and 29°C (84.2°F) are considered as excellent and extremely pleasant for lengthened periods.

What is the average length of the day in October in Cayenne?

The average length of the day in October is 12h.

How long on average sun shines in October in Cayenne?

The average sunshine in October in Cayenne, French Guiana, is 8.1h.

What is the month with the highest UV index in Cayenne?

January through June, August through November, with an average maximum UV index of 12, are months with the highest UV index in Cayenne, French Guiana.

What is the UV index reading in October in Cayenne?

In Cayenne, French Guiana, the average daily maximum UV index in October is 12. A UV Index value of 11, and more, symbolizes an extreme health threat from unsafe exposure to the Sun's UV rays.
Average temperature in October - Cayenne, French Guiana
  • Average high temperature in October: 32.2°C

The warmest month (with the highest average high temperature) is October (32.2°C).
The month with the lowest average high temperature is January (29.1°C).

  • Average low temperature in October: 22.3°C

The month with the highest average low temperature is April (23.7°C).
The coldest month (with the lowest average low temperature) is September (22.2°C).

Average rainfall in October - Cayenne, French Guiana
  • Average rainfall in October: 63.3mm

The wettest month (with the highest rainfall) is May (579.4mm).
The driest month (with the lowest rainfall) is September (55.7mm).

Average rainfall days in October - Cayenne, French Guiana
  • Average rainfall days in October: 7.6 days

The month with the highest number of rainy days is May (26.4 days).
The month with the lowest number of rainy days is September (7.1 days).

Average sea temperature in October - Cayenne, French Guiana
  • Average sea temperature in October: 28.5°C

The best month for swimming (with the highest average sea temperature) is August (28.7°C).
The coldest month (with the lowest average sea temperature) is February (27.3°C).

Average daylight in October / Average sunshine in October - Cayenne, French Guiana
  • Average daylight in October: 12h

Months with the longest days are June and July (Average daylight: 12.4h).
The month with shortest days is December (Average daylight: 11.8h).

  • Average sunshine in October: 8.1h

The month with most sunshine is September (Average sunshine: 8.5h).
The month with least sunshine is January (Average sunshine: 3h).

Average UV index in October - Cayenne, French Guiana
  • Average UV index in October: 12

Months with the highest UV index are January, February, March, April, May, June, August, September, October and November (UV index 12).
Months with the lowest UV index are July and December (UV index 11).