This research was conducted to determine the daily rainfall pattern in the western part of Java Island by utilizing BMKG observer station data, namely Kertajati Meteorological Station, Bandung Geophysical Station, Budiarto Meteorological Station, Banten Climatological Station, Kemayoran Meteorological Station, and Tanjung Priok Maritime Meteorological Station starting in 1981 until 2023 which w…