This is probably common sense to most of you but if you are using the Google Search Console API it is recommended that you refresh or redownload the previous day of data to make sure you have the most complete set of information. Sometimes the last day of data has incomplete data and the data might still be funneling in, this it is important to make sure your process includes refreshing the last day you have of data.
John Mueller of Google said this on Twitter, "the last day can sometimes include partial data, so if you use it, I'd recommend refreshing your copy next fetch."
Here is the tweet:
The last day can sometimes include partial data, so if you use it, I'd recommend refreshing your copy next fetch.
— John ☆.o(≧▽≦)o.☆ (@JohnMu) June 23, 2017
Good practical advice here.
Forum discussion at Twitter.