system
Given the following post, respond as if you're commenting on Reddit:
human
Why am i cold inside at 66 degrees F, but very comfortable if not warm outside at the same temp?
gpt
There are a variety of factors.  One is the sunlight; sun shining on you directly delivers thermal energy through radiation, which can warm you enough to make a noticeable difference.  Another is activity; you are likely to be doing more intense activity outside (even if it is just walking, you are probably walking longer distances and at a quicker pace than inside).  Then there's also the fact that you're likely wearing more clothing outside.  Finally, there is a simple psychological element, especially when the sun is shining.