May weather forecast
Guinea-Bissau

May in Guinea-Bissau marks the transition from the dry season to the wet season. Temperatures continue to rise, averaging between 25°C (77°F) during the cooler morning hours and 39°C (102.2°F) at the peak of the day, making it one of the hottest months of the year.

In the coastal regions, including the capital city, Bissau, temperatures are somewhat tempered by the Atlantic Ocean, ranging from 25°C (77°F) to 37°C (98.6°F). However, the city begins to experience higher levels of humidity in preparation for the upcoming monsoon season.

May sees a significant increase in rainfall compared to the preceding dry months, with precipitation levels reaching up to 120mm (4.72"). This increase in rainfall, although not yet at the level of the intense rains of the full wet season, signifies the beginning of the country's transition to its rainy phase.

When compared to April, May is both hotter and wetter, signaling the end of the dry season. Despite the rising heat, humidity, and rainfall, May still offers opportunities for visitors to explore Guinea-Bissau, especially early in the month before the rains become more regular. The beginning of the wet season also leads to a burst of growth in the country's flora, transforming the landscape into a lush, green spectacle.

---

• Bissau - May »
  In Bissau during May, the rain falls for 3 days and regularly aggregates up to 17mm (0.67") of precipitation. In Bissau, during the entire year, the rain falls for 86 days and collects up to 2023mm (79.65") of precipitation.
• Gabu - May »
  On the last day of the month, in Gabu, sunrise is at 06:30 and sunset at 19:18 GMT. Throughout the year, in Gabu there are 80 rainfall days, and 1426mm (56.14") of precipitation is accumulated.
• Canchungo - May »
  In Canchungo in May, it is raining for 4 days, with typically 11mm (0.43") of accumulated precipitation. January through June, September through December, with an average maximum UV index of 7, are months with the highest UV index in Canchungo.
• Bissora - May »
  In Bissora in May, during 3.8 rainfall days, 6mm (0.24") of precipitation is typically accumulated. The month of May signals a distinct change in weather patterns in Bissora, as the dry spell of the previous months is replaced with rainfall.
• Bolama - May »
  The months with the highest UV index in Bolama are January through December, with an average maximum UV index of 7. The months with the highest UV index in Bolama are January through December, with an average maximum UV index of 7.
• Cacheu - May »
  January through June, September through December, with an average maximum UV index of 7, are months with the highest UV index in Cacheu, Guinea-Bissau. On the last day of the month, in Cacheu, sunrise is at 06:38 and sunset at 19:26 GMT.
• Buba - May »
  January through July, September through December, with an average maximum UV index of 7, are months with the highest UV index in Buba, Guinea-Bissau. A surge in relative humidity can disrupt the body's normal cooling function by slowing evaporation, hence reducing the rate at which the body cools and intensifying the perception of heat.
• Catió - May »
  In Catió, in May, during 4.4 rainfall days, 16mm (0.63") of precipitation is typically accumulated. In Catió, in May, it is raining for 4.4 days, with typically 16mm (0.63") of accumulated precipitation.
• Quebo - May »
  On the last day of the month, in Quebo sunrise is at 06:35 and sunset at 19:19 GMT. In Quebo in May, during 4.4 rainfall days, 16mm (0.63") of precipitation is typically accumulated.
• Fulacunda - May »
  As the second month of Fulacunda's wet season, May sees a substantial increase in rainfall, humidity, and cloud cover. In Fulacunda, in May, during 4.4 rainfall days, 16mm (0.63") of precipitation is typically accumulated.
• Farim - May »
  Augmented relative humidity impedes typical body cooling mechanisms by lowering the evaporation rate, resulting in decreased body cooling and an amplified perception of heat. From the heights of the May heat, Farim records a mean nighttime low of 23.8°C (74.8°F).