Abstract :
The objective of this study was to assess the changing trend of annual and monthly rainfall pattern due to climate change in Bangladesh. The updated yearly rainfall data of last 10 years (2002-2011) and monthly rainfall data of five years (2007-2011) for seven selected divisional district weather stations of Bangladesh used in this study. The yearly and monthly total amount of rainfall widely varies over the time and place of the country. Highest yearly rainfall occurred in Sylhet station in 2002, 2003, 2004, 2005, 2006, 2008, 2010 & 2011 but Chittagong station in 2007, 2009 & 2011. Maximum amount of yearly total rainfall (4939 mm) was recorded at Sylhet station in 2010 and lowest at Rajshahi station in all the years during 2002 to 2011. The highest average monthly rainfall occurs in July followed by June, August & September. Lowest amount of monthly rainfall occurs in January followed by December and February. The highest rainfall occurred in monsoon season (June-September) and lowest rainfall in winter season (December-February). Rainfall widely varied over different parts of the country.
