Climate in Bissau
(Guinea-Bissau)
Average daytime and nighttime temperatures
All climatic diagrams on this site result from the collected data from 2 measuring stations in Bissau.
All data correspond to the average monthly values of the last 20 years.
Back to overview: Guinea-Bissau
Bissau is the coldest region in Guinea-Bissau with an average high temperature of only 33°C. The climate is very warm with an annual average of 33 degrees, but has few truly tropical and sultry months. It is warm to hot all year round and invites to bathe at average water temperatures of 26 degrees. Dued to the lesser rain the best time for traveling is from November to May. The most rain days occur from from July to October.
› Overview: Climate in Guinea-Bissau
› Daylengths and sun positions in Guinea-Bissau
› Compare climate with other regions or countries
› Daylengths and sun positions in Guinea-Bissau
› Compare climate with other regions or countries
Hours of sunshine per day

The number of hours of sunshine refers to the time when the sun is actually visible. That is, without any obstruction of visibility by clouds, fog or mountains. With 10 hours per day, April is the sunniest month in country part Bissau. In August the sun shines the shortest.
Rainy days per month

A rainy day is a day on which at least an amount of 0.1 mm precipitation (=0.1 liter) per square meter falls. This can be rain, snow, hail or even dew. So it does not have to rain the whole day. With 24 rainy days, August offers the most number of rainy days, and in December the least.
Precipitation in mm/day

The amount of precipitation is measured in millimeters per square meter. Thus, at 2 mm/day, 2 liters of water fall on one square meter within 24 hours. With only 0 mm, the least rain falls in December. August, on the other hand, has the most rain.
Water temperature

Water temperature depends not only on solar radiation within the same region, but also on ocean currents. For example, depending on the season, cold or warm water masses are moved from other areas. The warmest temperatures in Bissau are in August, when the water is 29 °C.
Relative humidity in %

Warm air can absorb more moisture than cold air. The relative humidity indicates how much moisture of the physically possible is actually contained in the air. At high humidity, the person feels uncomfortable and perceives this as oppressive. In general, a relative humidity of 40-60% gives as pleasant. With humidity averaging 87%, August is the most uncomfortable. In January, on the other hand, it is easier to endure.
Absolute humidity in g/m³

In warm months, there is also a higher absolute humidity almost everywhere. At a temperature of 25°C, air can absorb up to 23 grams of water per cubic meter. At 20°C, it is only 17.3 grams. A relative humidity of 40% at 25°C thus corresponds to an absolute humidity of 9.2 grams of water. From a proportion of approx. 13.5 grams, humans perceive the air as muggy. This limit is reached in 11 months in Bissau, although these are average values, and a month is rarely completely or not at all considered humid.
Humidex in °C

The "Humidex" (humidity index) is an index of well-being in warmer areas, calculated from the air temperature, relative humidity and dew point. The index corresponds approximately to the temperature felt. At high temperatures, the body transports heat away by sweating. At high humidity the ambient air can only absorb a small amount of sweat and thus one feels uncomfortable. An index of 20-29 is considered comfortable. Up to 39, people perceive the air as slightly uncomfortable, and above 40, as very uncomfortable. Values above 45 are dangerous in the long run and often lead to heat stroke.
Climate charts for other country parts in Guinea-Bissau

Most important cities in the country part »Bissau«
As the capital region, it is arguably the most important part of Guinea-Bissau.City | Population | Geo-Position | |
---|---|---|---|
Bissau | 395,954 | 11° 51' 49"N | 15° 35' 52"W |
Data basis: German Weather Service, individual values averaged and supplemented by own elements. Data on cities and inhabitants: geonames.org, United Nations Statistics Division and own research.