Bissau Temperature by Month

Bissau in Guinea-Bissau enjoys a stable climate, with daytime temperatures staying close to 33°C (91°F) throughout the year. Explore the full monthly breakdown below.

The temperature in Bissau changes very little across the seasons, maintaining a similar climate throughout the year. Maximum daytime temperatures range from a very warm 30°C (86°F) in August to a very hot 35°C (95°F) in March. Nighttime lows range from 23°C (73°F) in March to 21°C (70°F) in August.

The chart below illustrates the average maximum day and minimum night temperatures in Bissau by month:

The coolest part of the day is typically between 4 AM and 6 AM, while 3 PM is usually the warmest, when solar heating is at its peak. March, the city's warmest month, averages 280 hours of sunshine.

The chart below shows the average temperature throughout the year:

Bissau's average annual maximum temperature is 33°C (91°F). To put that in context, here's how it compares to a few well-known destinations:

Rome, Italy averages 20°C (68°F) annually, with reliably warm summers and comfortable winters.

Toronto, Canada averages 13°C (55°F) annually, with cold snowy winters balanced by genuinely warm summers.

San Francisco, USA averages 19°C (66°F) annually, but with little seasonal variation, summers are often cool and foggy, winters mild.

Perth, Australia averages 25°C (77°F) annually, with a classic Mediterranean climate, hot dry summers and mild wet winters.

Climate temperature data is typically calculated as a 30-year average. This smooths out year-to-year variability and gives a more reliable picture of what a place is actually like, rather than what happened in any single unusual year.

The readings come from a range of sources, land-based weather stations, ocean buoys, ships, and satellites. That data is collected by weather services around the world, then pooled, quality-checked, and averaged to produce the climate records you see here.

Seasonal temperature shifts influence more than just how warm it feels, they also drive changes in rainfall, cloud cover, and wind patterns throughout the year.

Warmer air holds more moisture, which tends to mean heavier or more frequent rain during the warmer months. When temperatures drop in winter, any precipitation that does fall is more likely to come as snow or sleet, though in Bissau this rarely lasts long on the ground.

For more on Bissau's weather, including monthly rainfall, sunshine hours, and humidity, visit our Bissau climate page.