The dry season (rouhghly from May-June to September-October) is the best time to visit Brasilia and the neighboouring areas. But humidity levels may fall below 15%, specially in August and September, which is almost a health threat. You will feel thirsty, but extra attention with hydration is necessary, since dehydration is a risk. Always carry a bottle of water, and never skip a sip. When drinking alcoholic drinks, even at night, when temperatures are more pleasant, always drink some water - you may wake up feeling extra terrible (that happened to me with two innocent bottles of wine recently!).;
If the drought is making it difficult for you to sleep, soak a towel and place it near your bed. This will help you keep humidity levels acceptable. When you wake up, you'll see it will be completely dry!
Don't come. Or if you do, don't drive. Many drivers are horrible, driving like complete selfish idiots, as if the roads are their own personal playground. I hate this place.
But what do you expect of a country where people think it's normal to have a baby via major abdominal surgery? I fear for the U.S. as the c-section rate there continues to climb, too. People born via violence are going to think violence is normal.
Brasilia is a safe city if compared to other places.
However, avoid isolated and dark places late at night.
If you are driving at night and must stop at a traffic light, close your car windows and pay attention to the surroundings. Only anware people are victims of robbery.
Although you are supposed to stop at the Pedestrian Passage when someone is about to cross, this rule can be ignored if it's late at night. (Please, try not to run over the pedestrian!)
I NEVER knew anyone who got robbed at the traffic light or anything, and I don't want you to be the first one, so please, be careful.
A bit of a advise from me:
If you do not like low temperatures, like me, better take a sweater or some other warm clothing with you when you go to a cinema otherwise you risk to freeze to death :)))
I went to see a movie and I had troubles concentrating on what was hapenning on the screen because I was too busy with the thought that it is way too cold.
Actually, outside the temperature was about 30 degrees C and I think it was not more than 16 degrees C in the cinema.
This is Palacio da Alvorada, where Fernando Henrique Cardoso, our crappy heartless president lives. Hide your wallets and valuable goods when pasing by!