This dataset contains over 72,000 event hyetographs associated with rainstorms that contain Annual Maximum rainfall (AMAX) values for durations between 5-min and 24-hr for a set of ~1,300 rain gauges in Great Britain. The record length and completeness varies on a gauge-by-gauge basis, the median record length is 19 years and the processed record ends in 06/2018. Note that a rainstorm may have a different duration to the associated AMAX value, e.g., a 24-hr AMAX total may be caused by an 18.25-hr event. Further note that multiple AMAX totals may be embedded within a single rainstorm, e.g., Storm Desmond can be associated with the 2-, 3-, 6-, 12- and 24-hr AMAX totals for 2009 recorded at Honister Pass. Each hyetograph is accompanied by summary statistics corresponding to the underlying rainstorm and associated AMAX totals. This dataset enables the study of the temporal characteristics of rainfall as well as more general studies regarding the climatology of AMAX-causing events in GB.