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 Nauru.

Country Summary

This page presents high-level information for Nauru's climate zones and its seasonal cycle for mean temperature and precipitation for the latest climatology, 1991-2020. Climate zone classifications in the map below use observed, historical data (sourced from the Climate Research Unit [CRU]) and are derived by applying the Köppen-Geiger climate classification methodology. This classification divides climate into five primary climate groups, which are divided based on seasonal precipitation and temperature patterns. The five primary groups are A (tropical), B (dry), C (temperate), D (continental), and E (polar). All climates, except for those in the E group are assigned a seasonal precipitation sub-group (second letter). It is important to understand the different climate contexts that exist within a country as well as the surrounding region when analyzing current climates and projected change. Climate classifications are identified by hovering your mouse over the legend. A narrative overview of Nauru's country context and climate is provided following the visualizations.

Köppen-Geiger Climate Classification, 1991-2020
  • Af
  • Am
  • As/Aw
  • BWh
  • BWk
  • BSh
  • BSk
  • Csa
  • Csb
  • Csc
  • Cwa
  • Cwb
  • Cwc
  • Cfa
  • Cfb
  • Cfc
  • Dsa
  • Dsb
  • Dsc
  • Dsd
  • Dwa
  • Dwb
  • Dwc
  • Dwd
  • Dfa
  • Dfb
  • Dfc
  • Dfd
  • ET
  • EF

Nauru is located in the south-eastern Micronesia region. It is one of the world’s smallest countries with a total land area covering just 21 kilometers square (km2), and is extremely remote, surrounded by deep sea and coral reefs. Nauru’s climate is tropical, but variable rainfall can lead to extended periods of drought. Nauru has limited ground water and no rivers or streams; its land consists of mineral deposits largely rock phosphate. Phosphate mining over the past century has had a very significant impact on the landscape and economy of Nauru.

Nauru is considered a fragile Pacific island with acute development challenges linked to its unusual economic circumstances. In 2019, Nauru had a population of 12,500 residents.  

Nauru has very limited access to freshwater, and is almost entirely dependent on rainwater collection tanks. While it is not as low-lying as some of its Pacific neighbors, nor exposed to tropical cyclones, Nauru’s precarious socioeconomic system and isolated position make it highly vulnerable to climate change impacts.