Ok this is what I can get from the info provided..... Lighting is more then likely a double dome unit which will have a compact UVB bulb which is basically useless.
You have to get asap a T5 or T8 linear light fixture with a 5.O bulb.
Temp at basking? What is the actual temp at the highest branch and what is the temp in the bottom. How are you checking your temps. How far away from the light is she?
When spraying her cage are you spraying for at least 2 minutes 3 times a day? What is the humidity percentage?
Veileds like plants so they will eat them. A pothos live plant is really beneficial for them covering the top of the soil with at least 1 inch sized river rock so she cant eat the dirt.
BOWL is bad.... They do not drink from them. They drink from plants and the branches in their enclosure. They can also drown in bowls.
What are you doing for supplements?
What all are you feeding her?
How are you gutloading your feeders?
We need a lot more info and pics would be very very helpful. As I said if she is keeping her eyes closed then something is really wrong.
The weather outside will not affect her inside. It has to be something with the husbandry being provided.
I am going to give you resource links as well.
https://www.chameleonforums.com/care/caresheets/veiled/
https://www.chameleonforums.com/care/