Report Data Availability
Currently, you can report on 30 days of data at a time based on the past 90 days only. The date fields on the RUM reporting interface show you which dates are available for you to select.
For Summary and Dimension report types, you can use the export feature to save report data for future analysis. Available formats are CSV and JSON. For details on exporting RUM report data, see Exporting Your RUM Report Data.