My highest number of hits in a day this month for my biggest site was 1,624, not all my sites get near that many tho
On weekdays 2500+, during the weekend less than 1500 (niche site) and that constantly for five years now. Very strange that difference. Puzzling even.
It totally depends upon your site views. I have visits around 5,000 per month and it calculates around 160-170 visits daily. Might be the number varies it shows the only average values.
Since you're asking about the highest visits in a day, I'll go ahead and answer that question. According to Google Analytics, the most visits that I had during a single day was 20,748. That was because of a spike, though. I wished I came close to averaging that.
My was Finance website which gives highest hits 65000 hits in a day. That was a day when we run a campaign. Else normally we get 10000+ unique views daily.
81 is the highest in one day for this month, doesnt sound like much but its a significant improvement over the previous 2 months.