French Guiana Climatic Classifications

Code Description Group Number of states/regions States/regions
Af Tropical rainforest Tropical 2 Cayenne Saint-Laurent-du-Maroni

Summary: Most regions (2) in French Guiana lie in the Tropical rainforest climate zone (Köppen: Af). The mean average of annual temperatures range from a high of 27.51°C (81.52°F) in Saint-Laurent-du-Maroni to a low of 27.39°C (81.3°F) in Cayenne.

Climate French Guiana: Weather By Month

Month Jan Feb Mar Apr May Jun Jul Aug Sep Nov Oct Dec Year
Record high °C (°F) 29.65(85.37) 29.14(84.45) 29.67(85.41) 29.86(85.75) 29.71(85.48) 29.83(85.69) 30.78(87.4) 32.07(89.73) 33.06(91.51) 33.49(92.28) 32.3(90.14) 30.38(86.68) 33.49(92.28)
Average high °C (°F) 28.86(83.95) 28.41(83.14) 28.96(84.13) 29.16(84.49) 29.15(84.47) 29.52(85.14) 30.32(86.58) 31.48(88.66) 32.29(90.12) 32.55(90.59) 31.53(88.75) 29.71(85.48) 30.16(86.29)
Daily mean °C (°F) 26.62(79.92) 26.31(79.36) 26.81(80.26) 27.05(80.69) 27.06(80.71) 27.03(80.65) 27.33(81.19) 28.05(82.49) 28.7(83.66) 28.96(84.13) 28.36(83.05) 27.14(80.85) 27.45(81.41)
Average low °C (°F) 23.16(73.69) 23.27(73.89) 23.55(74.39) 23.83(74.89) 23.94(75.09) 23.34(74.01) 22.98(73.36) 23.15(73.67) 23.53(74.35) 23.79(74.82) 23.84(74.91) 23.52(74.34) 23.49(74.28)
Record low °C (°F) 22.33(72.19) 22.58(72.64) 22.84(73.11) 23.15(73.67) 23.31(73.96) 22.6(72.68) 22.26(72.07) 22.31(72.16) 22.6(72.68) 22.86(73.15) 22.95(73.31) 22.7(72.86) 22.26(72.07)
Average precipitation mm (inches) 99.25(3.91) 106.37(4.19) 83.73(3.3) 153.39(6.04) 217.23(8.55) 181.83(7.16) 120.83(4.76) 73.0(2.87) 33.17(1.31) 24.21(0.95) 73.4(2.89) 145.89(5.74) 109.36(4.31)
Average precipitation days (≥ 1.0 mm) 16.37 17.55 15.81 19.18 23.18 21.45 20.73 13.78 7.86 6.27 10.37 16.95 15.79
Average relative humidity (%) 81.92 83.36 81.76 83.07 85.41 85.2 83.13 80.09 77.95 76.75 79.13 82.5 81.69
Mean monthly sunshine hours 9.54 8.49 8.77 8.95 9.29 9.99 10.39 10.72 11.0 10.92 10.52 9.85 9.87

French Guiana Climate Graph

French Guiana’s Cities by Temperature

French Guiana’s states/regions ranking by average yearly temperature:

Saint-Laurent-du-Maroni
27.51°C | 81.52°F
Cayenne
27.39°C | 81.3°F

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