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

March 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
The first month of the spring, March, is still a warm month in Cayenne, French Guiana, with average temperature varying between 23.5°C (74.3°F) and 29.6°C (85.3°F).

Temperature

In March, the average high-temperature is relatively the same as in February - a still warm 29.6°C (85.3°F). In March, the average low-temperature is 23.5°C (74.3°F).

Rainfall

In Cayenne, during March, the rain falls for 20.7 days and regularly aggregates up to 334.3mm (13.2") of 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 March, the average sea temperature is 27.7°C (81.9°F).
Note: Water temperature between 25°C (77°F) and 29°C (84.2°F) is regarded as very warm and enjoyable by all. With these temperatures, water activities are pleasurable, without feeling uncomfortable for prolonged periods.

Daylight

The average length of the day in Cayenne is 12.1h.

Sunshine

In March, the average sunshine is 3.8h.

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, French Guiana. A UV Index estimate of 11, and higher, represents an extreme health hazard from unsafe exposure to the UV radiation for average individuals.
Note: In March, the average maximum UV index of 12 translate into the following recommendations:
Practice all-important precautions. Light skin people may get burned in less than 5 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. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. A broad-spectrum sunscreen of SPF 30+ should be liberally applied and re-applied every two hours, and immediately after an outdoor workout or a swim. Beware! The reflection of water and sand dramatically increases exposure to the UV rays.

What is the temperature in March in Cayenne?

In March, in Cayenne, the average high-temperature is 29.6°C (85.3°F), and the average low-temperature is 23.5°C (74.3°F).

How much does it rain in Cayenne in March?

In Cayenne, in March, it is raining for 20.7 days, with typically 334.3mm (13.2") of accumulated precipitation.

What is the water temperature in March in Cayenne?

In March, the average sea temperature is 27.7°C (81.9°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 March in Cayenne?

In March, the average length of the day in Cayenne is 12.1h.

How long on average sun shines in March in Cayenne?

In March, the average sunshine in Cayenne, French Guiana, is 3.8h.

What are the months 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.

What is the UV index intensity in March in Cayenne?

The average daily maximum UV index in March in Cayenne is 12. A UV Index of 11, and more, symbolizes an ultimate hazard to health from unprotected exposure to the UV radiation.
Average temperature in March - Cayenne, French Guiana
  • Average high temperature in March: 29.6°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 March: 23.5°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 March - Cayenne, French Guiana
  • Average rainfall in March: 334.3mm

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 March - Cayenne, French Guiana
  • Average rainfall days in March: 20.7 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 March - Cayenne, French Guiana
  • Average sea temperature in March: 27.7°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 March / Average sunshine in March - Cayenne, French Guiana
  • Average daylight in March: 12.1h

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 March: 3.8h

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 March - Cayenne, French Guiana
  • Average UV index in March: 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).