Hot
Average highs reach 32°C, so days can feel very hot.
September verdict
Cayenne, French Guiana in September
Weather score78Very good
Very good for holiday weather
Average highs reach 32°C, so days can feel very hot. Sunshine averages 8.3h per day, so bright days are a strong part of the month. Rainfall averages 41mm, which is relatively low for holiday planning.
September weather
Monthly averages
Temp
32°C
Rain
41mm
Sun
8.3h
Sea
28°C
Weather score
78
Very good
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Drier
Rainfall averages 41mm, which is relatively low for holiday planning.
Bright
Sunshine averages 8.3h per day, so bright days are a strong part of the 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
September32°C average high
September is one of Cayenne's warmest months, with daytime heat above the yearly average.
Warmest monthsJuly to November
This stretch sets the upper range for average daytime heat.
Rain
September41mm average rain
September is one of Cayenne's driest months, making outdoor days easier to plan than in wetter parts of the year.
Driest monthsJuly to November
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
September8.3 hours average sun
September is one of Cayenne's sunniest months, with some of the strongest bright-day conditions in the yearly averages.
Brightest monthsAugust to November
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
September28°C average sea
September 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
September78 weather score
September is one of Cayenne's best weather-score months, combining the strongest overall balance in the yearly averages.
Best weather monthsAugust to October
These months have the strongest weather score in the monthly averages.