Warm
Average highs sit around 32°C, giving warm days by monthly-average standards.
Weather Guide
Cayenne, French Guiana Average Monthly Weather
Weather score58Good annual avg
Best months: September, October, August
Across the year, average daytime temperatures are around 30°C, sunshine averages 5.9h per day, and rainfall totals about 3242mm. Sea temperatures average 28°C across the year.
Annual weather
Annual averages
Temp
30°C
Rain
3242mm
Annual total
Sun
5.9h
Sea
28°C
Weather score
58
Good avg
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Showers
Rainfall averages 96mm, so some wet days are possible.
Some sun
Sunshine averages 7.7h per day, enough for a balanced month.
Warm sea
Sea temperatures average 28°C, so swimming is usually comfortable by monthly-average standards.
Map
Weather map
Compare Cayenne, French Guiana with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
August32°C average high
August sits in the warmer part of the year, so midday sightseeing can feel heavier than in cooler months.
Warmest monthsJuly to November
This stretch sets the upper range for average daytime heat.
Rain
August96mm average rain
August sits on the drier side of Cayenne's year, which helps with sightseeing and transfers.
Driest monthsJuly to November
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
August7.7 hours average sun
August is brighter than Cayenne's yearly average, though the strongest sunshine usually sits closer to the peak months.
Brightest monthsAugust to November
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
August28°C average sea
August is part of a consistently warm sea-temperature pattern, so swimming comfort changes little through the year.
Warmest seaAll year
Sea temperatures stay warm enough for easy swimming through the year.
Weather score
August72 weather score
August scores above Cayenne's yearly average, so the overall weather mix is stronger than most months.
Best weather monthsAugust to October
These months have the strongest weather score in the monthly averages.