The climate science community sources a suite of global climate models to help decision makers understand the projections of future climate change and related impacts, among the most widely used are the Coupled Model Intercomparison Project, Phase 5 (CMIP5) models included in the IPCC's Fifth Assessment Report (AR5). Key projected climate trends summarized from the country's Second National Communication (2014) includes:
- More warming is projected over the Western side of the country, whereby a warming of up to 3.4ºC is projected by 2100.
- A warming of less than 1.76ºC for 2050 and 3.28ºC for 2100 is projected over parts of the northern coast regions and north-eastern highlands.
- A warming in excess of 1.77ºC for 2050 and 3.3ºC for 2100 is projected over the Lake Victoria zone.
- A warming in excess of 1.39ºC for 2050 is projected in central Tanzania zone.
- And a warming of 3.18ºC for 2100 is projected for the southern coast including Mtwara and Lindi regions.
- Rainfall projections indicate that some parts of the country may experience an increase in mean annual rainfall of up to 18-28% by 2100, particularly over the Lake Victoria Basin and North-Eastern Highland.
- The South Western Highlands and Western Zones of the country are projected to experience an increase in annual rainfall by up to 9.9% in 2050 and by up to 17.7% in 2100.
- The North Coast Zone is projected to have an 66 increase of about 1.8% in 2050 and 5.8% in 2100 while the Central Zone is projected to have an increase of up to 9.9% in 2050 and up to 18.4% in 2100.
- The Southern Coast Zone is projected to have a decrease of up to 7% in 2050 and an increase of annual rainfall of about 9.5% in 2100.
This section allows the visualization of climate variables and indices derived from scientifically vetted CMIP5 projections for different timeframes, statistics, emission scenarios, and climate models.