The southwestern region is one of the vulnerable areas of Bangladesh of drought. This study was conducted to determine the frequency and intensity of meteorological droughts in the southwestern region of Bangladesh using rainfall, temperature and groundwater data covering a period of 1994–2018. The Combined Drought Index (CDI) value is used for drought assessment and a Microsoft Excel-based CDI software package is deployed in calculating that. This software requires minimum two climatic variables among the rainfall, temperature and soil moisture data while rainfall data is mandatory. Here, rainfall and temperature data are used for soil moisture data are unavailable. Moreover, groundwater level data are analyzed to assess the impacts of drought on it. Spatio-temporal distribution of drought is shown using the ArcGIS tools. The result shows that drought is a common and recurrent feature for the southwestern region of Bangladesh. The monthly CDI analysis result shows that entire study period is experienced approximately 1%, 7%, 14% and 35% of extremely severe, severe, moderate and mild droughts, respectively. The yearly CDI index reveals that almost 60% of study period are affected by drought considering at least 6 months of the year are suffering from any form of drought. This phenomenon is high for last 10 years. Spatial and trend analysis shows that groundwater depth is getting lower and steeper in this region. So, all these indicate that south western region of Bangladesh is vulnerable to extreme drought, which is mostly appearing during the pre-monsoon (February–May) period of the twelvemonth.

西南地区是孟加拉国干旱的脆弱地区之一。这项研究的目的是使用1994-2018年期间的降雨，温度和地下水数据确定孟加拉国西南地区的气象干旱的频率和强度。组合干旱指数（CDI）值用于干旱评估，并使用基于Microsoft Excel的CDI软件包进行计算。该软件在降雨，温度和土壤湿度数据中至少需要两个气候变量，而降雨数据是必填项。在这里，降雨和温度数据用于土壤水分数据不可用。此外，分析了地下水位数据以评估干旱对其的影响。使用ArcGIS工具可以显示干旱的时空分布。结果表明，干旱是孟加拉国西南地区的常见和经常性特征。每月的CDI分析结果表明，整个研究期间分别经历了极端严重，严重，中度和轻度干旱的大约1％，7％，14％和35％。年度CDI指数显示，考虑到一年中至少有6个月遭受任何形式的干旱，几乎60％的研究期都受到干旱的影响。最近十年来这种现象很严重。空间和趋势分析表明，该地区的地下水深度越来越低。因此，所有这些表明孟加拉国西南部地区易受极端干旱的影响，这主要出现在十二个月的季风前（二月至五月）期间。