French Guiana climate guide

Temperature in French Guiana (°C)

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Max temperature (daytime)
29°C maximum daytime temperature in January in French Guiana (Cayenne)29
29°C maximum daytime temperature in February in French Guiana (Cayenne)29
29°C maximum daytime temperature in March in French Guiana (Cayenne)29
30°C maximum daytime temperature in April in French Guiana (Cayenne)30
29°C maximum daytime temperature in May in French Guiana (Cayenne)29
30°C maximum daytime temperature in June in French Guiana (Cayenne)30
31°C maximum daytime temperature in July in French Guiana (Cayenne)31
32°C maximum daytime temperature in August in French Guiana (Cayenne)32
32°C maximum daytime temperature in September in French Guiana (Cayenne)32
32°C maximum daytime temperature in October in French Guiana (Cayenne)32
31°C maximum daytime temperature in November in French Guiana (Cayenne)31
30°C maximum daytime temperature in December in French Guiana (Cayenne)30
Min temperature (night-time)
23°C minimum night-time temperature in January in French Guiana (Cayenne)23
23°C minimum night-time temperature in February in French Guiana (Cayenne)23
23°C minimum night-time temperature in March in French Guiana (Cayenne)23
24°C minimum night-time temperature in April in French Guiana (Cayenne)24
23°C minimum night-time temperature in May in French Guiana (Cayenne)23
23°C minimum night-time temperature in June in French Guiana (Cayenne)23
23°C minimum night-time temperature in July in French Guiana (Cayenne)23
22°C minimum night-time temperature in August in French Guiana (Cayenne)22
23°C minimum night-time temperature in September in French Guiana (Cayenne)23
23°C minimum night-time temperature in October in French Guiana (Cayenne)23
23°C minimum night-time temperature in November in French Guiana (Cayenne)23
23°C minimum night-time temperature in December in French Guiana (Cayenne)23
Sea temperature
27°C sea temperature in January in French Guiana (Cayenne)27
27°C sea temperature in February in French Guiana (Cayenne)27
27°C sea temperature in March in French Guiana (Cayenne)27
27°C sea temperature in April in French Guiana (Cayenne)27
27°C sea temperature in May in French Guiana (Cayenne)27
28°C sea temperature in June in French Guiana (Cayenne)28
28°C sea temperature in July in French Guiana (Cayenne)28
28°C sea temperature in August in French Guiana (Cayenne)28
28°C sea temperature in September in French Guiana (Cayenne)28
28°C sea temperature in October in French Guiana (Cayenne)28
28°C sea temperature in November in French Guiana (Cayenne)28
27°C sea temperature in December in French Guiana (Cayenne)27

Sunshine & Daylight in French Guiana

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Daily hours of sunshine
Daily hours of daylight
12 hours of daylight per day in January in French Guiana (Cayenne)12
12 hours of daylight per day in February in French Guiana (Cayenne)12
12 hours of daylight per day in March in French Guiana (Cayenne)12
12 hours of daylight per day in April in French Guiana (Cayenne)12
12 hours of daylight per day in May in French Guiana (Cayenne)12
12 hours of daylight per day in June in French Guiana (Cayenne)12
12 hours of daylight per day in July in French Guiana (Cayenne)12
12 hours of daylight per day in August in French Guiana (Cayenne)12
12 hours of daylight per day in September in French Guiana (Cayenne)12
12 hours of daylight per day in October in French Guiana (Cayenne)12
12 hours of daylight per day in November in French Guiana (Cayenne)12
12 hours of daylight per day in December in French Guiana (Cayenne)12

Rainfall in French Guiana

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Number of days with some rain
20 days with some rainfall in January in French Guiana (Cayenne)20
16 days with some rainfall in February in French Guiana (Cayenne)16
22 days with some rainfall in March in French Guiana (Cayenne)22
21 days with some rainfall in April in French Guiana (Cayenne)21
26 days with some rainfall in May in French Guiana (Cayenne)26
23 days with some rainfall in June in French Guiana (Cayenne)23
18 days with some rainfall in July in French Guiana (Cayenne)18
9 days with some rainfall in August in French Guiana (Cayenne)9
4 days with some rainfall in September in French Guiana (Cayenne)4
4 days with some rainfall in October in French Guiana (Cayenne)4
11 days with some rainfall in November in French Guiana (Cayenne)11
18 days with some rainfall in December in French Guiana (Cayenne)18
Average monthly rainfall (mm)
367 mm monthly rainfall in January in French Guiana (Cayenne)367
306 mm monthly rainfall in February in French Guiana (Cayenne)306
374 mm monthly rainfall in March in French Guiana (Cayenne)374
439 mm monthly rainfall in April in French Guiana (Cayenne)439
544 mm monthly rainfall in May in French Guiana (Cayenne)544
412 mm monthly rainfall in June in French Guiana (Cayenne)412
200 mm monthly rainfall in July in French Guiana (Cayenne)200
96 mm monthly rainfall in August in French Guiana (Cayenne)96
40 mm monthly rainfall in September in French Guiana (Cayenne)40
46 mm monthly rainfall in October in French Guiana (Cayenne)46
124 mm monthly rainfall in November in French Guiana (Cayenne)124
294 mm monthly rainfall in December in French Guiana (Cayenne)294

More climate for French Guiana

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
UV Index (Maximum)
UV (maximum) index 11+ (Extreme) in January in French Guiana (Cayenne)11
UV (maximum) index 11+ (Extreme) in February in French Guiana (Cayenne)11
UV (maximum) index 11+ (Extreme) in March in French Guiana (Cayenne)11
UV (maximum) index 11+ (Extreme) in April in French Guiana (Cayenne)11
UV (maximum) index 11+ (Extreme) in May in French Guiana (Cayenne)11
UV (maximum) index 11+ (Extreme) in June in French Guiana (Cayenne)11
UV (maximum) index 11 (Extreme) in July in French Guiana (Cayenne)11
UV (maximum) index 11+ (Extreme) in August in French Guiana (Cayenne)11
UV (maximum) index 11+ (Extreme) in September in French Guiana (Cayenne)11
UV (maximum) index 11+ (Extreme) in October in French Guiana (Cayenne)11
UV (maximum) index 11+ (Extreme) in November in French Guiana (Cayenne)11
UV (maximum) index 11 (Extreme) in December in French Guiana (Cayenne)11
Heat & Humidity
High heat & humidity in January in French Guiana (Cayenne)H
High heat & humidity in February in French Guiana (Cayenne)H
High heat & humidity in March in French Guiana (Cayenne)H
High heat & humidity in April in French Guiana (Cayenne)H
High heat & humidity in May in French Guiana (Cayenne)H
Very high heat & humidity in June in French Guiana (Cayenne)VH
Very high heat & humidity in July in French Guiana (Cayenne)VH
Very high heat & humidity in August in French Guiana (Cayenne)VH
Very high heat & humidity in September in French Guiana (Cayenne)VH
Very high heat & humidity in October in French Guiana (Cayenne)VH
Very high heat & humidity in November in French Guiana (Cayenne)VH
High heat & humidity in December in French Guiana (Cayenne)H

Note: 0 = None, L = Low, M = Moderate, H = High, VH = Very high, E = Extreme

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The climate guide for French Guiana shows long term monthly weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

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