May weather forecast
Bissau, Guinea-Bissau

As May commences, one can observe Bissau transitioning from the hot, dry phase into the wet season. There is a considerable upswing in rainfall, with May registering 17mm (0.67"), indicating the arrival of the monsoon. Sea temperatures continue to rise, reaching a warming 26.8°C (80.2°F). The longer daylight hours, stretching up to 12.7 hours, allow for extended periods of outdoor exploration. The intensifying UV index necessitates extra precaution during outdoor excursions.

Temperature

The arrival of May marks a slight shift to an average high-temperature of a still tropical 32.8°C (91°F) from April's 33.3°C (91.9°F). Bissau encounters an average low-temperature of 22.2°C (72°F) during May nights.

Rainfall

In May, in Bissau, the rain falls for 3 days. Throughout May, 17mm (0.67") of precipitation is accumulated. In Bissau, during the entire year, the rain falls for 86 days and collects up to 2023mm (79.65") of precipitation.

Sea temperature

In Bissau, the average seawater temperature in May is 26.8°C (80.2°F).
Note: Between the temperatures of 25°C (77°F) and 29°C (84.2°F), water is considered very warm, providing pleasure in water activities without discomfort over lengthy periods.

Daylight

In May, the average length of the day in Bissau is 12h and 41min.
On the first day of May, sunrise is at 06:42 and sunset at 19:16. On the last day of the month, sunrise is at 06:36 and sunset at 19:23 GMT.

Sunshine

The average sunshine in May in Bissau, Guinea-Bissau, is 8h.

UV index

The months with the highest UV index are February through September, with an average maximum UV index of 12. A UV Index reading of 11, and higher, represents an extreme threat to health from exposure to the Sun's UV radiation for average individuals.
Note: In May, the maximum UV index of 12 suggests these recommendations:
Take all critical precautions, unprotected skin might burn swiftly. Limit direct sun exposure especially between 10 a.m. and 4 p.m., when UV radiation is at its peak. However, keep in mind that shade structures may not provide full sun protection. Experience reduced UV exposure by about half when donning a wide-brim hat. A broad-spectrum sunscreen of SPF 30+ should be used liberally and reapplied every two hours or post an outdoor workout or swim. Caution! The Sun's UV rays become stronger due to reflections from water and sand.