March weather forecast
Cayenne, French Guiana

The weather in March sustains the city’s tropical atmosphere with minimal temperature shifts from February. Although thunderstorms are common, conditions gradually transition away from the earlier high rainfall of the year. Sunbathing becomes more pleasurable as daylight duration expands and the sea’s warm temperature remains steady. On land, flora flourishes in the bright, moisture-rich climate. The rate of rainfall progressively escalates, registering 334mm (13.15") in March in Cayenne, French Guiana.

Temperature

Cayenne's weather in March displays an average high-temperature of a still moderately hot 29.6°C (85.3°F), showing minor disparity from February's 29.2°C (84.6°F). An average temperature of 23.5°C (74.3°F) marks the nights in March.

Rainfall

In Cayenne, in March, it is raining for 20.7 days, with typically 334mm (13.15") 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 Cayenne, French Guiana, the average seawater temperature in March is 27.7°C (81.9°F).
Note: Water temperatures between 25°C (77°F) and 29°C (84.2°F) are regarded as highly pleasant, making all water activities enjoyable without any discomfort over long durations.

Daylight

In March, the average length of the day is 12h and 6min.
On the first day of March in Cayenne, sunrise is at 06:40 and sunset at 18:42. On the last day of the month, sunrise is at 06:28 and sunset at 18:38 -03.

Sunshine

In Cayenne, the average sunshine in March 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. A UV Index of 11, and more, symbolizes an extreme threat to health from unprotected exposure to Sun's UV rays for the average person.
Note: A typical high UV index of 12 in March suggests 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. Employ a hat with a wide brim for robust protection, cutting UV exposure by half. Despite the cloudy weather, sunscreen with a sun protection factor of at least 30 should be liberally applied and reapplied, including after a swim or outdoor activity. Stay vigilant! UV rays get a boost in intensity due to sand and water reflections.