Compared to the average of 1995-2014 ^[Note] (23.4℃, at the reference station Hong Kong Observatory (HKO)), the annual mean temperature in Hong Kong in 2081-2100 is projected to increase by about 2.0℃ and 3.6℃ respectively under the intermediate (SSP2-4.5) and very high (SSP5-8.5) greenhouse gas emissions scenarios.

Projected change in annual mean temperature of Hong Kong relative to the average of 1995-2014 under the intermediate (SSP2-4.5) and very high (SSP5-8.5) greenhouse gas emissions scenarios. (Data source: IPCC AR6)

» Annual mean temperature projection data (updated)

» Observed temperature change

Note: AR6 adopted the 20-year period 1995-2014 in the recent past as a common reference period for climate projections of temperature, rainfall and mean sea level. Compared to the average of 1885-1904 (22.1℃, the earliest 20-year average instrumental temperature data available at HKO), the annual mean temperature in Hong Kong in 2081-2100 is projected to increase by about 3.3℃ and 4.9℃ respectively under the intermediate (SSP2-4.5) and very high (SSP5-8.5) greenhouse gas emissions scenarios.

Data source:

Gutiérrez, J.M., R.G. Jones, G.T. Narisma, L.M. Alves, M. Amjad, I.V. Gorodetskaya, M. Grose, N.A.B. Klutse, S. Krakovska, J. Li, D. Martínez-Castro, L.O. Mearns, S.H. Mernild, T. Ngo-Duc, B. van den Hurk, and J.-H. Yoon, 2021: Atlas. In Climate Change 2021: The Physical Science Basis. Contribution of Working Group I to the Sixth Assessment Report of the Intergovernmental Panel on Climate Change [Masson-Delmotte, V., P. Zhai, A. Pirani, S.L. Connors, C. Péan, S. Berger, N. Caud, Y. Chen, L.Goldfarb, M.I. Gomis, M. Huang, K. Leitzell, E. Lonnoy, J.B.R. Matthews, T.K.Maycock, T. Waterfield, O. Yelekçi, R. Yu, and B. Zhou (eds.)]. Cambridge University Press. In Press. Interactive Atlas available from http://interactive-atlas.ipcc.ch/
The projections were based on limited digital data available at the website of Interactive Atlas as at December 2021.