Weather and Climate in French Guiana

French Guiana has a tropical climate and is not hit by tropical cyclones. Temperatures average around 28 ° C and are relatively stable all year round in both the rainy and dry seasons.

There is a comparatively high humidity of more than 80%. The coastal regions benefit from the Atlantic trade winds during the day.

The dry season is between July and December. The other months, with the exception of March, are the rainy season. The wettest month is May.

The best time to travel is in the dry season between July and December. Then the temperatures are a little higher than in the rest of the year, but the probability of rain drops significantly. In the rainy season, the most precipitation falls in May.

Average daytime temperature

Region

Jan

Feb

March

Apr

May

June

July

Aug

Sep

Oct

Nov

Dec

Cayenne- Rochambeau

28 ° C

28 ° C

29 ° C

29 ° C

29 ° C

29 ° C

30 ° C

31 ° C

31 ° C

31 ° C

30 ° C

29 ° C

Average night temperature

Region

Jan

Feb

March

Apr

May

June

July

Aug

Sep

Oct

Nov

Dec

Cayenne-Rochambeau

22 ° C

22 ° C

23 ° C

23 ° C

23 ° C

22 ° C

22 ° C

21 ° C

21 ° C

21 ° C

22 ° C

22 ° C

Average water temperature

Region

Jan

Feb

March

Apr

May

June

July

Aug

Sep

Oct

Nov

Dec

Kourou

27 ° C

27 ° C

27 ° C

28 ° C

28 ° C

28 ° C

28 ° C

28 ° C

28 ° C

28 ° C

28 ° C

28 ° C

Average hours of sunshine / day

Region	Jan	Feb	March	Apr	May	June	July	Aug	Sep	Oct	Nov	Dec
Cayenne-Rochambeau	4	4	4	5	4	5	6	7	8	8	7	5

Average rainy days / month

Region	Jan	Feb	March	Apr	May	June	July	Aug	Sep	Oct	Nov	Dec
Cayenne-Rochambeau	24	21	21	23	26	26	20	15	9	10	14	23