Some countries, like Dominican Republic, has a good weather conditions to grow bananas in a garden. When we are talking about ideal temperatures for growing bananas, than the night temperature would be about 20 C (67 F) and the day temperature would be about (27 C) 80 F. High humidity of 50% and higher is required too. If you are not in luck for such weather conditions, you can grow banana in your house. Do not forget to give it a lot of sun all day long and a big container. Usually a living room is the best place because this location is mostly heated. And if you take care about your banana, your banana tree will thank you with a banana fruit. Probably not so big, but taste great.