Areas of Low Climatic Risk
To ensure coffee farming is viable in a given region, the scientific community has established metrics for judging whether a region will be an area of low climatic risk now and in the future. The following paragraph describes the climatic conditions suitable for arabica coffee production:
Annual average temperature between 18° C and 22° C, annual water deficit less than 100 mm [meaning evaporation rates only exceed precipitation rates by a maximum of 100 mm per annum] and frost probability (risk of lowest annual temperature less than 1° C) less than 25%.