Low season in Rio de Janeiro started on 1st of April and will last until 1st of December.
If you want to visit Rio de Janeiro it is from now until then that is the optimal timeframe.
Everything will be cheaper and it will be much more relaxing to visit the tourist spots.
In my opinion the climate will be quite comfortable during the entire period.
Of course, if you like very warm weather you should check the temperature forecasts.
My general web site - MBergo
