Heating and cooling degree days (HDDs/CDDs) method is commonly used to quantify the demand for energy needed for cooling and heating of buildings. Therefore, daily air temperature (minimum and maximum) from four stations in Iraq were analyzed to detect the annual and monthly heating and cooling degree-days trend over the period 1970–2014 using linear regression techniques. The results indicated that; Annual mean values of accumulated heating degree-days AHDDs recorded from 1048^oC in Basra station in the south to 2289^oC in Mosul station north of Iraq. The annual mean values of ACDDs registered from 2220^oC in Rutba to 2927^oC in Basra. The annual AHDDs trends analysis indicated significant decreasing trends for all stations with probability level ≥ 99 % except in Basra. The monthly AHDDs showed a general decreasing trend for all stations, and for most months about 91.6 % of monthly trends had negative values. However, the annual total accumulated cooling degree-days ACDDs indicated that all stations registered significant positive trends with probability level ≥ 99 %. The highest annual positive linear tendency rate was recorded in Basra (19.586 ^oC/year). Moreover, the monthly ACDDs showed in the winter months from December to February, there were no significant trend values recorded. Except for these three months, there were significantly increased ACDDs trends in all stations and for the majority of the months during the study period.

采暖和制冷天数（HDDs / CDDs）方法通常用于量化建筑物制冷和供暖所需的能源需求。因此，使用线性回归技术分析了伊拉克四个站点的每日气温（最低和最高），以检测1970-2014年期间的年度和每月供热和制冷度-天数趋势。结果表明：从南部的巴士拉站的1048 ^o C到伊拉克北部的摩苏尔站的2289 ^o C记录的累积加热天数AHDD的年平均值。从鲁特巴（Rutba）的2220 ^o C到2927 ^o所记录的ACDD的年平均值C在巴士拉。年度AHDD趋势分析表明，除巴士拉地区外，所有站点的概率均在≥99％的情况下呈显着下降趋势。所有电台的每月AHDD均显示总体下降趋势，并且在大多数月份中，约91.6％的每月趋势具有负值。但是，年度累计降温日数ACDDs表明，所有台站都呈现出显着的正趋势，概率水平≥99％。巴士拉（19.586 ^oC /年）。此外，在12月至2月的冬季月份，每月的ACDDs均没有记录到明显的趋势值。除这三个月外，在研究期间的所有月份以及大部分月份中，ACDDs趋势均显着增加。