On average across the year, no, Malta is not hotter than Brazil . Malta has an average temperature of 19°C/66°F and Brazil has an average temperature of 25°C/77°F.
Malta's hottest month is August, with an average maximum temperature of 32°C/90°F, which is not hotter than Brazil's hottest month (December, with an average maximum temperature of 33°C/91°F).
On average across the year, yes, Malta is colder than Brazil . Malta has an average minimum temperature of 16°C/61°F and Brazil has an average minimum temperature of 19°C/66°F.
Malta's coldest month is January, with an average minimum temperature of 9°C/48°F, which is colder than Brazil's coldest month (July, with an average minimum temperature of 15°C/59°F).
On average across the year, no, Malta has less rain than Brazil. Malta has an average annual rainfall of 406mm and Brazil has an average annual rainfall of 548mm.
Malta's wettest month is November, with an average monthly rainfall of 86mm, which is wetter than Brazil's wettest month (January, with an average monthly rainfall of 83mm).