Cayenne Temperature by Month
Cayenne, French Guiana has a consistently very warm climate year-round, with daytime highs averaging 30°C (86°F). Below you'll find a full monthly breakdown and a comparison with cities worldwide.
Cayenne Monthly Temperatures
With minimal seasonal shifts, Cayenne experiences a constant climate year-round. Maximum daytime temperatures range from a very warm 32°C (90°F) in October to a comfortable 29°C (84°F) in July. At night, temperatures range from 24°C (75°F) in October to 24°C (75°F) in July.
The chart below illustrates the average maximum day and minimum night temperatures in Cayenne by month:
The coolest part of the day is typically between 4 AM and 6 AM, while 3 PM is usually the warmest, when solar heating is at its peak. October, the city's warmest month, averages 251 hours of sunshine.
The chart below shows the average temperature throughout the year:
Temperature: Cayenne vs French Guiana
The map below shows the annual temperature across French Guiana. You can also select individual months if you want to compare a specific time of year.
very warm
warm
pleasant
moderate
cold
very cold
Cayenne vs World: Temperature Compared
Cayenne's average annual maximum temperature is 30°C (86°F). To put that in context, here's how it compares to a few well-known destinations:
Barcelona, Spain has an annual average of around 21°C (70°F), with warm summers and mild, fairly short winters.
Reykjavík, Iceland averages 9°C (48°F) a year — mild summers by Icelandic standards, but cold winters and frequent wind.
New York City, USA averages 17°C (63°F) a year, with hot humid summers and cold winters that bring regular snowfall.
Tokyo, Japan averages 21°C (70°F) a year, with hot summers, cool winters, and a well-defined cherry blossom spring.
Climate temperature data is typically calculated as a 30-year average. This smooths out year-to-year variability and gives a more reliable picture of what a place is actually like, rather than what happened in any single unusual year.
The readings come from a range of sources — land-based weather stations, ocean buoys, ships, and satellites. That data is collected by weather services around the world, then pooled, quality-checked, and averaged to produce the climate records you see here.
Seasonal temperature shifts influence more than just how warm it feels — they also drive changes in rainfall, cloud cover, and wind patterns throughout the year.
Warmer air holds more moisture, which tends to mean heavier or more frequent rain during the warmer months. When temperatures drop in winter, any precipitation that does fall is more likely to come as snow or sleet, though in Cayenne this rarely lasts long on the ground.
For more on Cayenne's weather — including monthly rainfall, sunshine hours, and humidity — visit our Cayenne climate page.
