f85447f3-c03c-476e-b30c-3e1147fac81920241128091831518wseas:wseasmdt@crossref.orgMDT DepositWSEAS TRANSACTIONS ON ENVIRONMENT AND DEVELOPMENT2224-34961790-507910.37394/232015http://wseas.org/wseas/cms.action?id=40311220241220242010.37394/232015.2024.20https://wseas.com/journals/ead/2024.phpMarioLefebvreDepartment of Mathematics and Industrial Engineering, Polytechnique Montréal, 2500, chemin de Polytechnique, Montréal (Québec) H3T 1J4, CANADAThe variations from year to year of the monthly average temperatures are modelled as a discrete-time Markov chain. By computing the limiting probabilities of the Markov chain, we can see the impact of climate change on these temperatures. The same type of model is proposed for the variations of the monthly amounts of precipitation. 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