There were excess deaths in March, April, May that are clearly seen in the data...since then I am not so sure.
The data continues to show excess deaths every single week this year. The excess deaths in March and April are simply more striking because of the sudden spikes and the fact that everything leading up to March and April was normal baseline numbers. I posted the CDC’s excess deaths chart already (it’s the green and blue one). It comes from this page: https://www.cdc.gov/nchs/nvss/vsrr/covid19/excess_deaths.htm
It’s important to note that these are NOT CDC’s numbers. These are simply what each jurisdiction (mostly county or city health departments) are reporting up the chain to CDC. CDC just takes all the reporting jurisdictions and compiles those numbers into one handy location for reference. They can be broken down by state and they have CSV files for download with all the reported data for you to look at yourself. I’ve seen no evidence that CDC is doing anything to the numbers. They are (albeit preliminary at this point) what they are.