I'll break with form and actually try to be helpful here. The rules around legal subletting in NYC are pretty restrictive but that doesn't stop anyone. Airbnb is under attack here (for good reason, in my opinion, but I won't rant about it here), so I tend to recommend going elsewhere for rentals in NYC, especially while the heat's on. VRBO.com ("Vacation Rentals by Owner")has always been our other company for apartment rentals. We've done airbnb for a month in Florence and time in wine country, but have used VRBO for a month in Provence and now next month in Paris. VRBO is now owned by TripAdvisor (same as FlipKey and HomeAway) and seems to be on firmer business footing these days in major cities.
At any rate, I agree that all of Harlem is safe. In NYC, being in areas that are close to subways and buses that run regularly is key. For tourists, having good access crosstown as well as downtown is also important. I plugged in some August dates on VRBO and several interesting places popped up. Go on their website and take a look at property #4080557ha for example. Looks like the major August need for a/c is met, there's ample floor space (2 bedrooms), a modern looking bathroom (probably means good pressure & even hot water, and an ok kitchen. Best of all, location is good for getting to the FDR (quick cab or Uber rides to other boroughs or even uptown/downtown) as well as bus lines. And, as an apartment in East Harlem just around E110th St/2nd Ave, it keeps you above Central Park so that you can get crosstown and gets you close enough to subway or bus lines downtown as well. The reviews all laud the safety of the area. Its in a quiet residential neighborhood, but with basic services nearby. I know nothing of the specific place but would consider it and definitely use it as a benchmark for other hunting.
Good luck. Will we be seeing you in August?