Parakeets are very sensitive and delicate birds and, if you want them to live a long and healthy life, you will need to learn how to keep a parakeet warm in your home, especially during the winter season. 

Parakeets do best in temperatures between 70 and 75 degrees so, if you live in colder areas, it is best to keep your parakeet inside so they are not hindered by the temperature. You can also take measures in winter months to ensure that your parakeet  is warm enough.