Abstract
The findings of the study indicate that the highest temperature was recorded at the Basra station, reaching 29.35°C, while the lowest mean temperature was observed at the Mosul station, at 21.71°C, followed by Rutba at 22.25°C, Regarding total rainfall, the Mosul station recorded the highest cumulative precipitation during the study period, amounting to 2946.2 mm, whereas the lowest rainfall total was recorded at Rutba station, with 722 mm, followed by Diwaniyah station at 783.1 mm, After applying the COVDA index, the results revealed that Mosul station exhibited consistently high humidity conditions (wet) across all years. The highest value was recorded in 2013, reaching 2.60, while the lowest drought index value at the same station was observed in 2009, at 1.14, In contrast, Baghdad station showed variability in drought conditions, ranging from highly dry to dry, semi-arid, and semi-humid. The lowest value was recorded in 2011 at 0.01, whereas in 2010 the index reached 0.58, corresponding to a semi-humid classification, At Khanaqin station, drought conditions ranged from wet to semi-humid and humid. The years 2012, 2013, 2014, 2015, 2016, and 2018 recorded wet conditions, with index values of 1.68, 1.35, 1.65, 1.16, 1.74, and 1.29, respectively, At Rutba station, the results of the index application ranged between dry and semi-arid conditions. The highest semi-arid values were recorded in 2010 and 2013, both reaching 0.44, while the highest dry condition was observed in 2009, with a value of 0.10, Finally, the stations of Al-Hayy, Najaf, Diwaniyah, Samawah, and Basra—due to their location within the desert climatic region—generally recorded dry to semi-arid conditions. However, exceptions were noted in 2013 and 2018 at Samawah station, where semi-humid conditions were recorded, with values of 0.60 and 0.68, respectively.