Climate zone: tropics
High humidity in French Guiana and high temperatures are causing a pleasant weather at times, but also and partly tropical hot and humid. It is yearlong warm or hot. Dued to the lesser rain the best time for traveling is from August to November. Most precipitation decrease from January to June.
› Duration of daylight and sunshine in French Guiana
hours of sunshine per day rainy days per month Precipitation in mm/day Relative humidity in % Absolute humidity in g/m³ (approx.)
Long-term development of temperatures from 1996 - 2018
In the years 1996 to 2018 there were only 2 weather stations in the whole country, which reported continuous temperature values (St Georges De L'oyapock, Cayenne Matoury). From these weather reports we have created a long-term development that shows the monthly average temperatures. The hottest month in this entire period was September 2017 with 27.7 °C. Januar 2000 was the coldest month with an average temperature of 24.8 °C.
The average annual temperature was about 26.1 °C in the years after 1996 and about 26.4 °C in the last years before 2018. So over the past 23 years it has only increased by a minimal 0.3 °C. This trend only applies to the selected 2 weather stations in French Guiana. A considerably more comprehensive evaluation of the global warming
has been provided separately.