May 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

What is the average temperature in May in Cayenne?

The average high-temperature, in May, in Cayenne, French Guiana, is 29.9°C (85.8°F), while the average low-temperature is 23.5°C (74.3°F).
Average temperature in May - Cayenne, French Guiana
  • Average high temperature in May: 29.9°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 May: 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 May - Cayenne, French Guiana
  • Average rainfall in May: 579.4mm

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 May - Cayenne, French Guiana
  • Average rainfall days in May: 26.4 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 May - Cayenne, French Guiana
  • Average sea temperature in May: 28.3°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 May / Average sunshine in May - Cayenne, French Guiana
  • Average daylight in May: 12.3h

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

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