Here are the cities that have good weather in a specific month:
January
February
March
April
May
June
July
August
September
October
November
December
Cities with great weather in September
San Carlos de Bariloche in January Good
San Carlos de Bariloche in February Good
San Carlos de Bariloche in March Good
Rio De Janeiro in September Good
Belo Horizonte in September Good
Buenos Aires in September Good
Campo Grande in September Good
Belo Horizonte in October Good
San Carlos de Bariloche in November Good
San Carlos de Bariloche in December Good