it was 36-38 degrees in Madrid. We've book it for 2 days and we've managed to stay there for few hours after what we've moved to a Hotel as it was too hot in the apartment. We were melting there but apartment in general is ok. So if you want to come to Madrid during colder weather it might be ok to stay here as the only issue we had was the temperature in the apartment, but if you're coming during hot season I definitely will not recommend it unless you want to sweat all the time and feel yourself uncomfortable