Warm
Average highs sit around 30°C, giving warm days by monthly-average standards.
December verdict
French Guiana in December
Weather score52Mixed
Mixed for holiday weather
Average highs sit around 30°C, giving warm days by monthly-average standards. Sunshine averages 5.4h per day, enough for a balanced month. Rainfall averages 248mm, so showers are a real planning factor.
December weather
Monthly averages
Temp
30°C
Rain
248mm
Sun
5.4h
Sea
18°C
Weather score
52
Mixed
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Wet
Rainfall averages 248mm, so showers are a real planning factor.
Some sun
Sunshine averages 5.4h per day, enough for a balanced month.
Cool sea
Sea temperatures average 18°C, so the water can feel cool.
Map
Weather map
Compare 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 French Guiana's year, useful if you prefer less intense daytime heat.
Warmest monthsAugust to November
This stretch sets the upper range for average daytime heat.
Rain
December248mm average rain
December sits near French Guiana's yearly rainfall average, so rain is a normal planning factor rather than an outlier.
Driest monthsAugust to November
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
December5.4 hours average sun
December is below French Guiana'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
December18°C average sea
December is close to French Guiana's usual sea temperature, with limited seasonal change in the water.
Warmest seaAll year
Sea temperatures stay warm enough for easy swimming through the year.
Weather score
December52 weather score
December scores below French Guiana's yearly average, so the weather trade-offs are more noticeable.
Best weather monthsAugust to October
These months have the strongest weather score in the monthly averages.