Warm
Average highs sit around 30°C, giving warm days by monthly-average standards.
December verdict
Cayenne, French Guiana in December
Weather score50Mixed
Mixed for holiday weather
Average highs sit around 30°C, giving warm days by monthly-average standards. Sunshine averages 5.3h per day, enough for a balanced month. Rainfall averages 294mm, so showers are a real planning factor.
December weather
Monthly averages
Temp
30°C
Rain
294mm
Sun
5.3h
Sea
28°C
Weather score
50
Mixed
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Wet
Rainfall averages 294mm, so showers are a real planning factor.
Some sun
Sunshine averages 5.3h 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
December30°C average high
December is on the cooler side of Cayenne's year, useful if you prefer less intense daytime heat.
Warmest monthsJuly to November
This stretch sets the upper range for average daytime heat.
Rain
December294mm average rain
December sits near Cayenne's yearly rainfall average, so rain is a normal planning factor rather than an outlier.
Driest monthsJuly to November
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
December5.3 hours average sun
December is below Cayenne's yearly sunshine average, so bright-day planning is less reliable than in peak months.
Brightest monthsAugust to November
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
December28°C average sea
December 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
December50 weather score
December is one of the weakest weather-score months, when the overall mix is less favourable than the rest of the year.
Best weather monthsAugust to October
These months have the strongest weather score in the monthly averages.