Warm
Average highs sit around 30°C, giving warm days by monthly-average standards.
May verdict
French Guiana in May
Weather score46Mixed
Mixed for holiday weather
Average highs sit around 30°C, giving warm days by monthly-average standards. Sunshine averages 4.5h per day, so this is not one of the brighter months. Rainfall averages 463mm, so showers are a real planning factor.
May weather
Monthly averages
Temp
30°C
Rain
463mm
Sun
4.5h
Sea
18°C
Weather score
46
Mixed
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Wet
Rainfall averages 463mm, so showers are a real planning factor.
Limited sun
Sunshine averages 4.5h per day, so this is not one of the brighter months.
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
May30°C average high
May 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
May463mm average rain
May is one of French Guiana's wettest months, so rain is likely to be a major planning factor.
Driest monthsAugust to November
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
May4.5 hours average sun
May is one of French Guiana's cloudier months, so sunshine-led plans are less reliable.
Brightest monthsAugust to November
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
May18°C average sea
May 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
May46 weather score
May 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.