Coldest temps Aloe Vera can survive- want to put them outside

10 celsius, 30 fahrenheit. Perhaps just a bit lower if it's very dry. This is standard for most succulents. They get quite large in tropical zones. Good luck.

Some can survive cool temps with protection, but not all, so you would need to know which plant you have. They are a tropical plant, so unless you live where it doesn't go below 32 degrees, you will need to keep it in a pot and bring it in when it cools off at night. I found an article about growing them outdoors that may help you.

https://www.gardeningknowhow.com/houseplants/aloe-vera/growing-aloe-outdoors.htm

No colder than 40° at night. Here is a site.

http://homeguides.sfgate.com/environment-needed-aloe-vera-plants-survive-67448.html

If you live in a milder climate, they will live in ground and take short spurts of colder weather if protected. A friend of mine has quite a few and covers them with cut in half Sparklets (5 gallon) water bottles or plastic with air holes for ventilation. You might lose a few arms, but they will live.

http://homeguides.sfgate.com/can-plant-aloe-vera-plant-outside-67996.html