Country

Tuvalu

Explore historical and projected climate data, climate data by sector, impacts, key vulnerabilities and what adaptation measures are being taken. Explore the overview for a general context of how climate change is affecting Tuvalu.

Current Climate Climatology

This page presents Tuvalu's climate context for the current climatology, 1991-2020, derived from observed, historical data. Information should be used to build a strong understanding of current climate conditions in order to appreciate future climate scenarios and projected change. You can visualize data for the current climatology through spatial variation, the seasonal cycle, or as a time series. Analysis is available for both annual and seasonal data. Data presentation defaults to national-scale aggregation, however sub-national data aggregations can be accessed by clicking within a country, on a sub-national unit.  Other historical climatologies can be selected from the Time Period dropdown list. Data for  specific coordinates can be downloaded for in the Data Download page.

Observed, historical data is produced by the Climatic Research Unit (CRU) of University of East Anglia. Data is presented at a 0.5º x 0.5º (50km x 50km) resolution.

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Climate Data Historical

Tuvalu has a tropical climate and it is characterized by two distinct seasons, a wet season from November to April and a dry season from May to October. This seasonal cycle is strongly influenced by the South Pacific Convergence. The mean annual rainfall in the southern islands of Tuvalu is 3,400 mm while in the north it is 2,900 mm. Temperature ranges from 25°C to 30°C all year around. The tropical cyclone season is from November to April. 

Temperature

  • Minimum air temperatures have risen 0.24°C per decade and maximums by 0.21°C per decade since 1950, while sea surface temperatures have risen 0.13°C per decade since 1970.

Precipitation

  • No statistically significant changes in annual and seasonal precipitation rates have been observed.
    Mean annual precipitation rates have tended to be around 500-600mm lower in Tuvalu’s northern-most atoll, Nanumea, than in the capital Funafuti. Nanumea also experiences greater interannual variability with annual rates ranging from 1,000-4,000mm between 2000-2010.

 

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