Guinea-Bissau Climate – June 2026 Update
Top 5 Cities: Bissau, Bafatá, Gabu, Bissorã, and Bolama
This month in numbers
Guinea-Bissau experienced a significantly warmer June, with an average temperature of 28.72°C, marking an anomaly of +1°C compared to the 1961–1990 baseline. This ranks as the 14th warmest June in 86 years of records. Globally, June 2026 was the 3rd warmest June for land temperatures on record, with an anomaly of +1°C.
What changed
The period from April to June 2026 saw an average temperature of 29.5°C, an anomaly of +0.8°C, making it the 10th warmest such period on record for Guinea-Bissau. This warming trend in Guinea-Bissau aligns with the broader global picture, as global land temperatures for the same three-month period ranked as the 2nd warmest on record, with an anomaly of +1°C.
What’s driving change?
Guinea-Bissau's tropical monsoon climate typically brings a rainy season from June to October, influenced by the Intertropical Convergence Zone. However, the region has been experiencing a gradual rise in temperature and diminishing rainfall over time. A heatwave affected Guinea-Bissau and many other West African nations from April 25 to June 18, 2026, with a mean temperature anomaly of 2.9°C across the affected area. Additionally, a major wildfire was reported near Bissau on June 3, 2026. The El Niño–Southern Oscillation (ENSO) is a significant climate driver that can influence both temperature and precipitation patterns in the region.
Looking ahead
The ongoing rainy season, which typically lasts until November, is expected to bring heavy precipitation, particularly from July to September.
Sources:
Generated by Gemini from climate data and web sources
At a Glance
Temperature – Average
Year-on-Year Trends
The 4byo Climate Helix – Guinea-Bissau
Data: Our World in Data / NOAA (rainfall: World Bank CCKP / CRU TS 4.08). Baseline: first 30 yrs on record. Recent: last 10 yrs on record.
Guinea-Bissau – Monthly Temperature – All Years
Data: Our World in Data / NOAA (rainfall: World Bank CCKP / CRU TS 4.08). Baseline: first 30 yrs on record. Recent: last 10 yrs on record.
Records – Guinea-Bissau
Our World in Data / NOAA - Anomalies vs 1901-2000 mean
Shifting Seasons
Wet / dry seasonsKöppen Aw · TropicalGuinea-Bissau doesn't have a warm/cold cycle - its monthly temperature range is only 4.2°C across the year - but it does have a strong wet/dry cycle (the wettest month gets 608× as much rain as the driest). So we track how the wet season has shifted instead.
Monthly rainfall climatology. A “wet month” exceeds the baseline monthly mean (dashed gold line). Biggest month-to-month shift: Aug (-47 mm, -8%).
Data: Our World in Data / NOAA (rainfall: World Bank CCKP / CRU TS 4.08). Baseline: first 30 yrs on record. Recent: last 10 yrs on record.
Rainfall & Precipitation
Rainfall & Rain Days – Totals
Headline: anomaly vs the 1961–1990 mean. Small figure: the actual value. Rank: position in the full record (1st = highest ever). Record: highest (or lowest) value on record with its year.
Emissions & Energy
Explore
Explore Climate Data
Data Sources
Data Sources for Guinea-Bissau
Every figure on this page is sourced from official, openly published climate datasets. Anomalies are calculated against the 1961–1990 baseline (temperature) and 1991–2020 (rainfall, sunshine, frost) - see the Methodology & Sources page for the complete dataset list and update calendar.
FAQs
FAQs
How is the climate in Guinea-Bissau changing?
Guinea-Bissau is warming in line with the rest of the world. The page above shows the latest monthly temperature anomaly versus the 1961-1990 baseline, the long-term annual trend, and the region's rank in the historical record. The headline panel also shows the long-term trend rate per decade and the warmest and coolest years on file.
Where does the climate data for Guinea-Bissau come from?
Climate data for Guinea-Bissau comes from Our World in Data, sourcing Copernicus ERA5 and HadCRUT5 (national temperature anomaly) and the Global Carbon Project via Our World in Data (CO₂ emissions), refreshed every month, when the upstream temperature and rainfall data are refreshed.
What is the climate baseline used on this page?
Anomalies on this page are calculated against the 1961-1990 climatological baseline, which is the standard reference period used by the Met Office, NOAA, IPCC and most national climate services. Some panels also show the source-native 1901-2000 (NOAA) or 1991-2020 (WMO) baselines for verification. See Methodology & Sources for the full reference.
Which areas does the Guinea-Bissau climate data cover?
The Guinea-Bissau climate profile covers Bissau, Bafatá, Gabu, Bissorã and surrounding areas. Temperature, rainfall and emissions data for Guinea-Bissau
How often is the Guinea-Bissau climate update refreshed?
The Guinea-Bissau climate update is refreshed monthly, typically a few days after the previous month closes and the upstream provider (Met Office HadUK-Grid, NOAA Climate at a Glance, Copernicus ERA5 or the Global Carbon Project) publishes its update. See the Climate Rankings for cross-region comparisons.