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Monthly climate in Cacheu, Guinea-Bissau

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Cacheu features a tropical savanna climate (Aw). Temperatures typically range between 26 °C (79 °F) and 29 °C (84 °F) through the year, but rarely can drop to 17 °C (62 °F) or can rise to as high as 42 °C (108 °F). The average annual precipitation amounts to about 1305 mm (51.4 inches) and receives 101 rainy days on the 1 mm (0.04 inches) threshold annually. Cacheu enjoys an average of 3625 hours of sunshine throughout the year, and daylight varies from 11 hours 24 minutes to 12 hours 49 minutes per day.

Monthly average temperatures in Cacheu, Guinea-Bissau

The warmest months in Cacheu are June, October and November, with daily mean temperatures ranging from 28 to 29 °C (83 - 84 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 26 to 27 °C (79 - 80 °F) throughout the day. On average each year, Cacheu experiences 329 days above 25 °C (77.0 °F) and 0 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Cacheu. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum39°C
(102°F)		40°C
(105°F)		41°C
(107°F)		42°C
(108°F)		40°C
(104°F)		36°C
(98°F)		33°C
(91°F)		33°C
(92°F)		35°C
(96°F)		35°C
(96°F)		38°C
(100°F)		38°C
(100°F)
Mean maximum37°C
(99°F)		39°C
(102°F)		40°C
(103°F)		40°C
(105°F)		37°C
(100°F)		34°C
(94°F)		32°C
(90°F)		32°C
(90°F)		33°C
(92°F)		34°C
(94°F)		36°C
(97°F)		37°C
(99°F)
Average high34°C
(94°F)		35°C
(96°F)		36°C
(97°F)		35°C
(96°F)		34°C
(93°F)		32°C
(90°F)		30°C
(86°F)		30°C
(85°F)		30°C
(87°F)		32°C
(90°F)		33°C
(93°F)		34°C
(94°F)
Daily mean26°C
(79°F)		27°C
(80°F)		27°C
(81°F)		27°C
(82°F)		27°C
(81°F)		28°C
(83°F)		27°C
(82°F)		27°C
(81°F)		27°C
(82°F)		29°C
(84°F)		28°C
(83°F)		26°C
(80°F)
Average low20°C
(68°F)		21°C
(69°F)		22°C
(71°F)		22°C
(72°F)		23°C
(74°F)		25°C
(78°F)		25°C
(78°F)		25°C
(77°F)		25°C
(77°F)		26°C
(79°F)		24°C
(76°F)		21°C
(69°F)
Mean minimum17°C
(63°F)		18°C
(65°F)		20°C
(68°F)		21°C
(69°F)		21°C
(70°F)		24°C
(75°F)		24°C
(75°F)		23°C
(74°F)		23°C
(74°F)		24°C
(75°F)		21°C
(71°F)		18°C
(65°F)
Minimum17°C
(62°F)		18°C
(64°F)		19°C
(66°F)		19°C
(67°F)		20°C
(68°F)		22°C
(72°F)		23°C
(74°F)		23°C
(73°F)		23°C
(74°F)		23°C
(73°F)		19°C
(66°F)		18°C
(64°F)

Compare climate in Cacheu with other places

Compare temperature, precipitation, sunshine, UV index in Cacheu, Guinea-Bissau with other places around the world.

Monthly average precipitation in Cacheu, Guinea-Bissau

Cacheu usually has the most precipitation in July, August and September, with an average of 25 rainy days and 372 mm (14.7 inches) of precipitation per month. The driest months in Cacheu are January, February and March. On average, 0 mm (0.0 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Cacheu. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)0 (0.0)0 (0.0)0 (0.0)0 (0.0)1 (0.0)47 (1.9)348 (13.7)451 (17.8)318 (12.5)123 (4.8)17 (0.7)0 (0.0)
Average precipitation days (≥ 1 mm)0000062426251730

Monthly sunshine hours in Cacheu, Guinea-Bissau

The sunniest months in Cacheu are March, April and May, when the sun shines an average of 11 hours 1 minutes a day. Least sunny months in Cacheu: January, August and September receive an average of 8 hours 32 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Cacheu. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours255285335333345318287256274308307317
Mean daily daylight hours11h 28m11h 43m12h 3m12h 23m12h 40m12h 49m12h 44m12h 29m12h 10m11h 49m11h 32m11h 24m

Solar UV radiation in Cacheu, Guinea-Bissau

Cacheu experiences the highest level of ultraviolet (UV) radiation in July, August and September, when the maximum UV index can reach values of 13 - 14, which corresponds to the Extreme category of sun exposure. January, November and December are in the Very High exposure category. In these months, the maximum values of the UV index do not exceed 9. For more detailed information, check out our hourly Cacheu UV Index data.

Average daily maximum UV levels by month for Cacheu. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)910121212131314141299