Cacheu, Guinea-Bissau climate

Aw Tropical savanna (dry winter)

Cacheu has a remarkably steady tropical climate (Tropical savanna (dry winter), Köppen Aw). The hottest month is June with an average daily high near 36°C, while the coldest is January averaging around 18°C at night. Precipitation totals about 1271 mm a year and is strongly seasonal — August alone averages 402 mm while March barely receives 0 mm.

☀️ All year

Very hot

Daytime highs near 36°C most of the year.

🌙 Nights

Stays warm

Even the coolest nights stay near 18°C.

🌧️ Rain

Wet

About 1271 mm of rain a year.

Wettest in August

⛅ Sky & trend

Fairly sunny

More sun than cloud through the year.

Temperature & precipitation

Daily high–low temperature range with the monthly average, plus monthly precipitation · 1991–2020 normals · hover a month for the exact figures

Hours of sunshine per day

Estimated sunny hours each month — daylight length × clear-sky fraction · 1991–2020 monthly cloud cover (NASA POWER)

Cacheu climate normals (1991–2020)

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°C)	34	36	38	38	37	36	33	32	33	34	34	33
Avg temp (°C)	26	28	29	30	30	30	29	28	28	29	28	26
Avg low (°C)	18	19	20	21	22	24	24	24	24	24	22	19
Precipitation (mm)	0	2	0	0	3	90	290	402	352	123	5	2

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Avg high (°C)	34	36	38	38	37	36
Avg temp (°C)	26	28	29	30	30	30
Avg low (°C)	18	19	20	21	22	24
Precipitation (mm)	0	2	0	0	3	90

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°C)	33	32	33	34	34	33
Avg temp (°C)	29	28	28	29	28	26
Avg low (°C)	24	24	24	24	22	19
Precipitation (mm)	290	402	352	123	5	2

Sky & atmosphere

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	37	32	25	28	37	53	71	77	71	49	41	41
Relative humidity (%)	49	42	43	48	53	70	85	90	90	87	76	63
Wind speed (m/s)	1.3	1.3	1.3	1.4	1.5	1.3	1.2	1.2	1.0	0.8	0.9	1.2

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Cloud cover (%)	37	32	25	28	37	53
Relative humidity (%)	49	42	43	48	53	70
Wind speed (m/s)	1.3	1.3	1.3	1.4	1.5	1.3

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	71	77	71	49	41	41
Relative humidity (%)	85	90	90	87	76	63
Wind speed (m/s)	1.2	1.2	1.0	0.8	0.9	1.2

Methodology & sources

Temperature & precipitation — 1991–2020 normals computed from 29 years of daily observations at Ziguinchor, a weather station, about 34 km from the city centre. The underlying daily records come from NOAA's global station network.

Cloud, humidity, wind & sunshine — modelled estimates from NASA POWER, NASA's satellite-and-reanalysis climatology. This is the standard global source for atmospheric variables, which are not measured at most weather stations.

How we build these numbers →