Complex sentence: For example, 2003 was the wettest year ever in Kathmandu, totaling over 2,900 mm of recorded annual precipitation due to an exceptionally prevalent monsoon season, while 2001 recorded only 356 mm of precipitation due to an extraordinarily weak monsoon.
Split into simpler sentences: For example, 2003 was the wettest year ever in Kathmandu, totalling over 2,900 mm of precipitation due to an exceptionally strong monsoon season. In contrast, 2001 recorded only 356 mm of precipitation due to an extraordinarily weak monsoon.