Another way is to put it in the oven, turned off, with a bowl of boiling water on the base of the oven. That works for me. If you have an unreliable oven, it can get too hot and kill the yeast, the above way is safest.
If you have a car and its outside, you can put the covered bowl in the car. I used to do that, but now we don't have a car
It was the greatest place to rise bread though!!!
Room temperature, even cold room temperature, will be fine to raise you bread, you might just need to wait a little longer. You can even rise dough in the refrigerator overnight.